Journal Papers

Cover Features

2020

Substrate integrated Bragg waveguide: an octave-bandwidth single-mode hybrid transmission-line for millimeter-wave and terahertz applications, B. Hong, N. Feng, J. Chen, G. P. Wang, V. Doychinov, R. Clarke, J. Cunningham, I. Robertson and N. Somjit, Optics Express, 28, 919, 27903 (2020). https://doi.org/10.1364/OE.399160

Determination of Permittivity of Dielectric Analytes in the Terahertz Frequency Range Using Split Ring Resonator Elements Integrated with On-Chip Waveguide, S. Park, and J. Cunningham, Sensors, 20, 4264 (2020). https://doi.org/10.3390/s20154264

Effect of Substrate Etching on Terahertz Metamaterial Resonances and Liquid Sensing Applications, S. Park and J. Cunningham, Sensors 20, 11, 3133 (2020). https://doi.org/10.3390/s20113133

Ultra-high-resolution software-defined photonic terahertz spectroscopy, R. Hermans, J. Seddon, H. Shams, L. Ponnampalam, A. Seeds, and G. Aeppli, Optica  7, 1445-1455 (2020). https://doi.org/10.1364/OPTICA.397506

Activated and metallic conduction in p-type modulation doped GeSn devices, Y. Gul, M. Myronov, S. N. Holmes and M. Pepper, Physical Review Applied, 14, 5, 054064 (2020). https://doi.org/10.1103/PhysRevApplied.14.054064

Perfect Absorption in GaAs Metasurfaces near the Bandgap Edge, L. L Hale, P. P. Vabischevich, T. Siday, C. T. Harris, T. S. Luk, S. J. Addamane, J. L. Reno, I. Brener, and O. Mitrofanov Optics Express, 28, 23 (2020). https://doi.org/10.1364/OE.404249

Noninvasive Near-Field Spectroscopy of Single Subwavelength Complementary Resonators, L. L Hale, J. Keller, T. Siday, R.I. Hermans, J. Haase, J.L. Reno, I. Brener, G. Scalari, J.Faist, O. Mitrofanov, Laser and Photonic Reviews, 14, 4 (2020). https://doi.org/10.1002/lpor.201900254

Perfectly absorbing dielectric metasurfaces for photodetection, O. Mitrofanov, L.L Hale P.P Vabishchevich, T.S Luk, S.J Addamane, J.L Reno, I. Brener, ACS Photonics 5, 10, (2020).  https://doi.org/10.1063/5.0019883

Resonance-enhanced terahertz nanoscopy probes, T. Siday, L. L. Hale, R.I. Hermans, O. Mitrofanov. ACS Photonics, 7, 3 (2020). https://doi.org/10.1021/acsphotonics.9b01766

All-dielectric photoconductive metasurfaces for terahertz applications, O. Mitrofanov and I. Brener, Photoniques, 101, 47 (2020). https://doi.org/10.1051/photon/202010147

High temperature metamaterial terahertz quantum detector.  M Jeannin, T Bonazzi, D Gacemi, A Vasanelli, S Suffit, L Li, A G Davies, E Linfield, C Sirtori, and Y Todorov.  Applied Physics Letters, 117, 251102 (2020).  https://doi.org/10.1063/5.0033367

Ultrafast terahertz saturable absorbers using tailored intersubband polaritons.  J Raab, F P Mezzapesa, L Viti, N Dessmann, L K Diebel, L Li, A G Davies, E H Linfield, C Lange, R Huber, and M S Vitiello.  Nature Communications, 11, 4290 (2020). https://doi.org/10.1038/s41467-020-18004-8

Exact frequency and phase control of a terahertz laser.  R A Mohandas, L Ponnampalam, L Li, P Dean, A J Seeds, E H Linfield, A G Davies, and J R Freeman. Optica, 7, 1143–1149 (2020).  https://doi.org/10.1364/OPTICA.395941

Nanospectroscopy of a single patch antenna strongly coupled to a mid infra-red intersubband transition in a quantum well.  R Gillibert, M Malerba, D Spirito, V Giliberti, L Li, A G Davies, E H Linfield, L Baldassarre, R Colombelli, and M Ortolani. Applied Physics Letters, 117, 101104 (2020).  https://doi.org/10.1063/5.0018865

Programmable, transform-limited pulses from a quantum cascade laser.  I Kundu, D R Bacon, P Dean, L Li, E H Linfield, A G Davies, and J R Freeman.  ACS Photonics, 7, 1143–1149 (2020).  https://doi.org/10.1021/acsphotonics.0c00458

External cavity terahertz quantum cascade laser with a metamaterial/graphene optoelectronic mirror.  N W Almond, X Qi, R Degl’Innocenti, S J Kindness, W Michailow, B Wei, P Braeuninger-Weimer, S Hofmann, P Dean, E H Linfield, A G Davies, A D Rakić, H E Beere, and D A Ritchie.  Applied Physics Letters, 117, 041105 (2020).  https://doi.org/10.1063/5.0014251

Modeling and improving the output power of terahertz master-oscillator power-amplifier quantum cascade lasers.  H Zhu, H Zhu, C Yu, G Chang, F Wang, J Chen, L Li, A G Davies, E H Linfield, Z Tang, P Chen, W Lu, G Xu, and L He.  Optics Express, 28, 23239–23250 (2020).  https://doi.org/10.1364/OE.395227

Terahertz master-oscillator power-amplifier quantum cascade laser with controllable polarization.  H Zhu, H Zhu, K Wang, C Yu, G Chang, F Wang, J Chen, L Li, A G Davies, E Linfield, G Xu, and L He.  Applied Physics Letters, 117, 021103 (2020).  https://doi.org/10.1063/5.0013505

Absorption engineering in an ultra-subwavelength quantum system.  M Jeannin, T Bonazzi, D Gacemi, A Vasanelli, L Li, A G Davies, E Linfield, C Sirtori, and Y Todorov.  Nano Letters, 20, 4430–4436 (2020).  https://doi.org/10.1021/acs.nanolett.0c01217

Photoconductive arrays on insulating substrates for high-field terahertz generation.  D R Bacon, T Gill, M Rosamond, A D Burnett, A Dunn, L Li, E H Linfield, A G Davies, P Dean, and J R Freeman.  Optics Express, 28, 17219–17231 (2020).  https://doi.org/10.1364/OE.391656

Quasi-static and propagating modes in three-dimensional THz circuits.  M Jeannin, D Gacemi, A Vasanelli, L Li, A G Davies, E H Linfield, G Biasol, C Sirtori, and Y Todorov.  Optics Express, 28, 16982–16995 (2020).  https://doi.org/10.1364/OE.391073

Quantum cascade laser based hybrid dual comb spectrometer.  L Consolino, M Nafa, M De Regis, F Cappelli, K Garrasi, F Mezzapesa, L Li, A G Davies, E H Linfield, M Vitiello, S Bartalini, and P De Natale.  Communications Physics, 3, 69 (2020).  https://doi.org/10.1038/s42005-020-0344-0

Quantum transmission line modelling and experimental investigation of the output characteristics of a terahertz quantum cascade laser.  M Xia, P Rubino, L Li, I Kundu, A Valavanis, A G Davies, E H Linfield, and P Dean.  IEEE Transactions on Terahertz Science and Technology, 10, 333–342 (2020).  https://doi.org/10.1109/TTHZ.2020.2970341

Long-wavelength photovoltaic heterodyne receivers using patch-antenna quantum cascade detectors.  A Bigioli, G Armaroli, A Vasanelli, D Gacemi, Y Todorov, D Palaferri, L Lianhe, A G Davies, E H Linfield, and C Sirtori.  Applied Physics Letters, 116, 161101 (2020).  https://doi.org/10.1063/5.0004591

Highly efficient surface-emitting semiconductor lasers exploiting quasi-crystalline distributed feedback photonic patterns.  S Biasco, A Ciavatti, L Li, A G Davies, E H Linfield, H Beere, D Ritchie, and M S Vitiello.  Light: Science and Applications, 9, 54 (2020).  https://doi.org/10.1038/s41377-020-0294-z

Wideband electrically-controlled Vernier frequency tuneable terahertz quantum cascade laser.  I Kundu, J Freeman, P Dean, L Li, E H Linfield, and A G Davies.  ACS Photonics, 7, 765–773 (2020).  https://dx.doi.org/10.1021/acsphotonics.9b01616

Mixing properties of room temperature patch-antenna receivers in a mid-infrared (9 µm) heterodyne system.  A Bigioli, D Gacemi, D Palaferri, Y Todorov, A Vasanelli, S Suffit, L Li, A G Davies, E H Linfield, F Kapsalidis, M Beck, J Faist, and C Sirtori.  Laser & Photonics Reviews, 14, 1900207 (2020).  https://doi.org/10.1002/lpor.201900207

High-speed modulation of a terahertz quantum cascade laser by coherent acoustic phonon pulses.  A Dunn, C Poyser, P Dean, A Demić, A Valavanis, D Indjin, M Salih, I Kundu, L Li, A Akimov, A G Davies, E Linfield, J Cunningham, and A Kent.  Nature Communications, 11, 835 (2020).  https://doi.org/10.1038/s41467-020-14662-w

Electrically pumped topological laser with valley edge modes.  Y Zeng, U Chattopadhyay, Bo Zhu, B Qiang, J Li, Y Jin, L Li, A G Davies, E H Linfield, B Zhang, Y Chong, and Q J Wang.  Nature, 578, 246–250 (2020).  http://doi.org/10.1038/s41586-020-1981-x

Terahertz photonic integrated circuit for frequency tuning and power modulation.  I Kundu, J R Freeman, P Dean, L H Li, E H Linfield, and A G Davies.  Optics Express, 48, 4374–4386 (2020).  https://doi.org/10.1364/OE.380656

2019

Line-defect photonic crystal terahertz quantum cascade laser, Klimont, A., Ottomaniello, A., Degl’Innocenti, R., Masini, L., Bianco, F., Wu, Y., …, Ritchie, D. A. Journal of Applied Physics, 126, 15 (2019).  https://doi.org/10.1063/1.5120025

Molecular Beam Epitaxial Growth of Terahertz Quantum Cascade Lasers. Beere, H. E., & Ritchie, D. A. (n.d.). In Molecular Beam Epitaxy (pp. 175-190). John Wiley & Sons Ltd.  doi:10.1002/9781119354987.ch11

High performance waveguide uni-travelling carrier photodiode grown by solid source molecular beam epitaxy, Xiaoli Lin, Michele Natrella, James Seddon, Chris Graham, Cyril C. Renaud, Mingchu Tang, Jiang Wu, Huiyun Liu, and Alwyn J. Seeds, Optics Express, 27, 25, 37065-37086 (2019).  https://doi.org/10.1364/OE.27.037065

Terahertz Detection with Perfectly-Absorbing Photoconductive Metasurface, Thomas Siday, Polina P Vabishchevich, Lucy Hale, Charles Thomas Harris, Ting Shan Luk, John L Reno, Igal Brener, Oleg Mitrofanov, Nano Letters, 19, 2888-2896 (2019). https://doi.org/10.1021/acs.nanolett.8b05118

Observation of Intersubband Polaritons in a Single Nanoantenna using Nano-FTIR Spectroscopy, Chih-Feng Wang, Terefe G Habteyes, Ting S Luk, John Klem, Igal Brener, Hou-Tong Chen, Oleg Mitrofanov, Nano Letters, 19, 7, 4620-4626 (2019). https://doi.org/10.1021/acs.nanolett.9b01623

Compact and sensitive heterodyne receiver at 2.7 THz exploiting a quasi-optical HEB-QCL coupling scheme, F Joint, G Gay, P-B Vigneron, T Vacelet, S Pirotta, R Lefevre, Y Jin, L Li, A G Davies, E Linfield, Y Delorme, and R Colombelli, Applied Physics Letters 115, 231104 (2019).  https://doi.org/10.1063/1.5116351

Optomechanical response with nanometer resolution in the self-mixing signal of a terahertz quantum cascade laser, A Ottomaniello, J Keeley, P Rubino, L Li, M Cecchini, E H Linfield, A G Davies, P Dean, A Pitanti, and A Tredicucci, Optics Letters 44, 5663–5666 (2019).  https://doi.org/10.1364/OL.44.005663 

Tunable broadband terahertz polarizer using graphene-metal hybrid metasurface, K Meng, S J Park, L H Li, D R Bacon, L Chen, K Chae, J Y Park, A D Burnett, E H Linfield, A G Davies, and J E Cunningham, Optics Express 27, 33768–33778 (2019).  https://doi.org/10.1364/OE.27.033768

Giant optical nonlinearity interferences in quantum structures, S Houver, A Lebreton, T A S Pereira, G Xu, R Colombelli, I Kundu, L Li, E H Linfield, A G Davies, J Mangeney, J Tignon, R Ferreira, and S S Dhillon, Science Advances 5, eaaw7554 (2019).  https://doi.org/10.1126/sciadv.aaw7554

Graphene integrated metamaterial device for all-electrical polarization control of terahertz quantum cascade lasers, S J Kindness, N Almond, W Michailow, B Wei, L Jakob, K Delfanazari, P Braeuninger-Weimer, S. Hofmann, H E Beere, D A Ritchie, R Degl’Innocenti, ACS Photonics 6,1547–1555 (2019). https://doi.org/10.1021/acsphotonics.9b00411

Increasing the sensitivity of terahertz split ring resonator metamaterials for dielectric sensing by localized substrate etching. K Meng, S J Park, A D Burnett, T Gill, C D Wood, M Rosamond, L H Li, L Chen, D R Bacon, J R Freeman, P Dean, Y H Ahn, E H Linfield, A G Davies, and J E Cunningham, Optics Express 27, 23164-23172 (2019). https://doi.org/10.1364/OE.27.023164

Sensing and imaging using laser feedback interferometry with quantum cascade lasers, A D Rakic, T Timre, K Bertling, Y L Lim, P Dean, A Valavanis, and D Injin, Applied Physics Reviews 6, 021320 (2019). https://doi.org/10.1063/1.5094674

Tunable and compact dispersion compensation of broadband THz quantum cascade laser frequency combs, F P Mezzapesa, V Pistore, K Garrasi, L Li, A G Davies, E H Linfield, S Dhillon, and M S Vitiello, Optics Express 27, 20231–20240 (2019). https://doi.org/10.1364/OE.27.020231

Fully phase-stabilized quantum cascade laser frequency comb, L Consolino, M Nafa, F Cappelli, K Garrasi, F P Mezzapesa, L Li, A G Davies, E H Linfield, M S Vitiello, P De Natale, and S Bartalini. Nature Communications 10, 2938 (2019).  https://doi.org/10.1038/s41467-019-10913-7

Detection sensitivity of laser feedback interferometry using a terahertz quantum cascade laser, J Keeley, K Bertling, P L Rubino, Y L Lim, T Taimre, X Qi, I Kundu, L H Li, D Indjin, A D Rakić, E H Linfield, A G Davies, and P Dean. Optics Letters 44, 3314–3317 (2019). https://doi.org/10.1364/OL.44.003314

3.5 THz quantum-cascade laser emission from dual diagonal feedhorns, B N Ellison, A Valavanis, O Auriacombe, D Gerber, T Rawlings, N Brewster, M L Oldfield, Y Han, L Li, E Zafar, E H Linfield, A G Davies, G Savini, M Emes, B Winter, D Walker, and E Saenz, International Journal of Microwave and Wireless Technologies, 08 May 2019. https://doi.org/10.1017/S175907871900028X

Ultra-strong light-matter coupling in deeply subwavelength THz LC resonators, M Jeannin, G Mariotti Nesurini, S Suffit, D Gacemi, A Vasanelli, L Li, A G Davies, E H Linfield, C Sirtori, and Y Todorov, ACS Photonics 6 1207–1215 (2019). http://doi.org/10.1021/acsphotonics.8b01778

Frequency-tunable continuous-wave random lasers at terahertz frequencies, S Biasco, H E Beere, D A Ritchie, L Li, A G Davies, E H Linfield, and M S Vitiello, Light: Science & Applications 8, 43 (2019). https://doi.org/10.1038/s41377-019-0152-z

Full-wave modelling of terahertz frequency plasmons in two-dimensional electron systems, A Dawood, J B Wu, C D Wood, L Li, E Linfield, A G Davies, J Cunningham, O Sydoruk, Journal of Physics D: Applied Physics 52, 215101 (2019). https://doi.org/10.1088/1361-6463/ab0ab7

Coherent imaging using laser feedback interferometry in pulsed-mode terahertz quantum cascade lasers, Y L Lim, K Bertling, T Taimre, T Gillespie, C Glenn, A Robinson, D Indjin, Y Han, L Li, E H Linfield, A G Davies, P Dean, and A D Rakić, Optics Express 27, 10221–10233 (2019). https://doi.org/10.1364/OE.27.010221

Terahertz Detection with Perfectly-Absorbing Photoconductive Metasurface, T Siday, P P Vabishchevich, L Hale, C T Harris, T Shan Luk, J L Reno, I Brener, O Mitrofanov, Nano Letters 19, 2888–2896 (2019). https://doi.org/10.1021/acs.nanolett.8b05118

Terahertz plasmon resonances in two-dimensional electron systems: Modelling approaches, S Siaber, S Zonetti, J E Cunningham, and O Sydoruk, Phys. Rev. Applied 11, 064067 (2019). https://doi.org/10.1103/PhysRevApplied.11.064067002248

A Connected Array of Coherent Photoconductive Pulsed Sources to Generate mW Average Power in the Submillimeter Wavelength Band, A Garufo, P M Sberna, G Carluccio, J R Freeman, D R Bacon, L H Li, J Bueno, J J A Baselmans, E H Linfield, A G. Davies, N. Llombart, and A Neto, IEEE Transactions on Terahertz Science and Technology,  IEEE Transactions on Terahertz Science and Technology 9, 221–236 (2019).  http://doi.org/10.1109/TTHZ.2019.289679

Ultrafast two-dimensional field spectroscopy of terahertz intersubband saturable absorbers, J Raab, C Lange, J L Boland, I Laepple, M Furthmeier, E Dardanis, N Dessmann, L Li, E H Linfield, A G Davies, M S Vitiello, and R Huber, Optics Express 3, 2248–2257 (2019). http://doi.org/10.1364/OE.27.002248

High dynamic range, heterogeneous, terahertz quantum cascade lasers featuring thermally-tunable frequency comb operation over a broad current range, K Garrasi, F P Mezzapesa, L Salemi, L Li, L Consolino, S Bartalini, P De Natale, A G Davies, E H Linfield, and M S Vitiello, ACS Photonics 6, 73–78 (2019). https://doi.org/10.1021/acsphotonics.8b01483

Conductance quantisation in patterned gate In0.75Ga0.25As structures up to 6×(2e2/h), Yilmaz Gul, Graham Creeth, David English, Stuart N Holmes, Kalarikad Thomas, Ian Farrer, David JP Ellis, David A Ritchie, Michael Pepper, Journal of Physics: Condensed Matter, 31(10), 104002, 2019. https://doi.org/10.1088/1361-648X/aafd05

2018

Efficient photoconductive terahertz detector with all-dielectric optical metasurface, Oleg Mitrofanov, Thomas Siday, Robert J Thompson, Ting Shan Luk, Igal Brener, John L Reno, APL Photonics, vol. 3 (5), pp. 051703, 2018. https://doi.org/10.1063/1.5011420

Norton Equivalent Circuit for Pulsed Photoconductive Antennas – Part II: Experimental Validation, Garufo, A., Carluccio, G., Freeman, J. R., Bacon, D. R., Llombart, N., Linfield, E. H., Davies, A. G. and Neto, A, IEEE Transactions on Antennas and Propagation, 66(4), 1646-1659 (2018). https://doi.org/10.1109/TAP.2018.2800704

Gas spectroscopy through multimode self-mixing in a double-metal terahertz quantum cascade laser, Y J Han, J Partington, R Chhantyal-Pun, M Henry, O Auriacombe, T Rawlings, L H Li, J Keeley, M Oldfield, N Brewster, R Dong, P Dean, A G Davies,
B N Ellison, E H Linfield, and A Valavanis, Optics Letters 43, 5933–5936 (2018). https://doi.org/10.1364/OL.43.005933

Noise characterization of patch antenna THz quantum detectors, D Palaferri, Y Todorov, D Gacemi, S Barbieri, L H Li, E H Linfield, A G Davies, and C Sirtori, Applied Physics Letters 113, 161105 (2018). https://doi.org/10.1063/1.5051580

Phase-sensitive terahertz imaging using room-temperature near-field nanodetectors, M Giordano, L Viti, O Mitrofanov, and MS Vitiello, Optica, Vol. 5, Issue 5, pp. 651-657 (2018) https://doi.org/10.1364/OPTICA.5.000651

A high electron mobility phonotransistor. C Poyser, L Li, RP Campion, AV Akimov, EH Linfield, AG Davies, JE Cunningham, and AJ Kent, Communications Physics (Nature group), 1 59 (2018). https://doi.org/10.1038/s42005-018-0059-7

Optical comb for generation of a continuously tunable coherent THz signal from 122.5 GHz to > 2.7 THz, L Ponnampalam, M J Fice, H Shams, C C Renaud and A J Seeds, Optics Letters, 43(11), 2507 – 2510 (2018). https://doi.org/10.1364/OL.43.002507

Optical phase lock loop as high-quality tuneable filter for optical frequency comb line selection (invited), K Balakier, H Shams, M Fice, L, Ponampalam, C Graham, C Renaud, A J Seeds, Journal of Lightwave Technology 36(19), pp. 4646 – 4654 (2018), https://doi.org/10.1109/JLT.2018.2848961

Optical Frequency Tuning for Coherent THz Wireless Signals (invited), H Shams, K Balakier, L Gonzales-Guerrero, M Fice, L Ponnampalam, C Graham, C Renaud, A Seeds, Journal of Lightwave Technology 36(19), 4664 – 4670 (2018 ), http://https//doi.org/10.1109/JLT.2018.2846031

Active control of electromagnetically induced transparency in a terahertz metamaterial array with graphene for continuous resonance frequency tuning, S. J. Kindness, N. W. Almond, B. Wei, R. Wallis, V. S. Kamboj, P. Braeuninger-Weimer, S. Hofmann, H. E. Beere, D. A. Ritchie, R. Degl’lnnocenti, Adv Opt. Mater. 2018, 1800570, http://https//doi.org/ 10.1002/adom.201800570

Amplitude stabilization and active control of a terahertz quantum cascade laser with a graphene loaded split-ring-resonator array, B. Wei, S. J. Kindness, N. W. Almond, R. Wallis, Y. Wu, Y. Ren, P. Braeuninger-Weimer, S. Hofmann, H. E. Beere, D. A. Ritchie and R. Degl’lnnocenti, Applied Physics Letters 112, 201102 (2018). https://doi.org/10.1063/1.5027687

Broadband heterogeneous terahertz frequency quantum cascade laser, L H Li, K Garrasi, I Kundu, Y J Han, M Salih, M S Vitiello, A G Davies, and E H Linfield, Electronics Letters, in the press, http://doi.org/10.1049/el.2018.6062

Determining ethanol content of liquid solutions using laser feedback interferometry with a terahertz quantum cascade laser, K Bertling, S Han, T Wu, C Zhao, Y L Lim, P Dean, S P Khanna, D Indjin, E H Linfield, A G Davies, S J Wilson, T Taimre, and A D Rakić, IEEE Sensors Letters 2, 3501604 (2018), http://doi.org/10.1109/LSENS.2018.2858927

Two-dimensional multimode terahertz random lasing with metal pillars, Y Zeng, G Liang, B Qiang, K Wu, J Tao, X Hu, L Li, A G Davies, E H Linfield, H Liang, Y Zhang, Y Chong, and Q J Wang, ACS Photonics 5, 2928–2935 (2018), http://doi.org/10.1021/acsphotonics.8b00260

Phase-resolved detector-less terahertz near-field microscopy, M C Giordano, S Mastel, C Liewald, L L Columbo, M Brambilla, L Viti, A Politano, K Zhang, Y Zhang, L Li, A G Davies, E H Linfield, R Hillenbrand, F Keilmann, G Scamarcio, and M S Vitiello, Optics Express 26, 18423–18435 (2018), http://doi.org/10.1364/OE.26.018423

Ultrafast switch-on dynamics of frequency tuneable semiconductor lasers, I Kundu, F Wang, X Qi, H Nong, P Dean, J R Freeman, A Valavanis, G Agnew, A T Grier, T Taimre, L Li, D Indjin, J Mangeney, J Tignon, S S Dhillon, A D Rakić, J E Cunningham, E H Linfield, and A G Davies, Nature Communications 9, 3076 (2018), http://doi.org/10.1038/s41467-018-05601-x

Continuous frequency tuning with near constant output power in coupled Y-branched terahertz quantum cascade lasers with photonic lattice, I Kundu, P Dean, A Valavanis, J R Freeman, M C Rosamond, L Li, Y Han, E H Linfield, and A G Davies, ACS Photonics 5, 2912–2910 (2018), http://doi.org/10.1021/acsphotonics.8b00251

Confinement of picosecond timescale current pulses by tapered coplanar waveguides, N Peters, M Rosamond, L Li, E H Linfield, A G Davies, M Ali, B J Hickey, and J Cunningham, Applied Physics Letters 112, 181103 (2018), https://doi.org/10.1063/1.5027202

Gas spectroscopy with integrated frequency monitoring through self-mixing in a terahertz quantum-cascade laser, R Chhantyal-Pun, A Valavanis, J T Keeley, P Rubino, I Kundu, Y J Han, P Dean, L Li, A G Davies, and E H Linfield, Optics Letters 43, 2225–2228 (2018), https://doi.org/10.1364/OL.43.002225

Room-temperature nine-µm-wavelength photodetectors and GHz-frequency heterodyne receivers, D Palaferri, Y Todorov, A Bigioli, A Mottaghizadeh, D Gacemi, A Calabrese, A Vasanelli, L Li, A G Davies, E H Linfield, F Kapsalidis, M Beck, J Faist, and C Sirtori, Nature 556, 85–88, 5 April 2018, Cover article, https://doi.org/10.1038/nature25790

Continuous-wave highly-efficient low-divergence terahertz wire lasers, S Biasco, K Garrasi, F Castellano, L Li, H E Beere, D A Ritchie, E H Linfield, A G Davies, and M S Vitiello, Nature Communications 9, 1122 (2018), https://doi.org/10.1038/s41467-018-03440-4

Silver-based surface plasmon waveguide for terahertz quantum cascade lasers, Y J Han, L H Li, J Zhu, A Valavanis, J R Freeman, L. Chen, M. Rosamond, P Dean, A G Davies, and E H Linfield, Optics Express 26, 3814–3827 (2018), https://doi.org/10.1364/OE.26.003814

Near-field spectroscopy and tuning of sub-surface modes in plasmonic terahertz resonators, O. Mitrofanov, Y. Todorov, D. Gacemi, A. Mottaghizadeh, C. Sirtori, I. Brener, and J. L. Reno, Optics Express 26, 7437-7450 (2018). https://doi.org/10.1364/OE.26.007437

Phase-sensitive terahertz imaging using room- temperature near-field nanodetectors, M C Giordano, L Viti, O Mitrofanov, and M S Vitiello, Optica 5, 651–656 (2018). https://doi.org/10.1364/OPTICA.5.000651

Continuous-wave, highly-efficient, low-divergence terahertz wire lasers, S Biasco, K Garrasi, F Castellano, L Li, H Beere, D Ritchie, E H Linfield, A G Davies, and M S Vitiello, Nature Communications 9, 1122 (2018). https://doi.org/10.1038/s41467-018-03440-4

Low-Loss Single-Mode Terahertz Bragg Fiber Fabricated by Digital Light Processing Rapid Prototyping, B Hong, N Somjit, M Swithenbank, N Greenall, R Clarke, N Chudpooti, P Akkaraekthalin, J Cunningham, I Robertson, IEEE Transactions on THz Science and Technology 8, 90–99 (2018). https://dio.org/10.1109/TTHZ.2017.2778047

Integrated Semiconductor Laser Optical Phase Lock Loops, K. Balakier, L. Ponnampalam, M. J. Fice, C. C. Renaud, and A. J. Seeds, J. Sel. Top. Quantum Electron., vol. 24, no. 1, 1500112 (2018). https://doi.org/10.1109/JSTQE.2017.2711581

Antenna Integrated THz Uni-Traveling Carrier Photodiodes, Cyril C. Renaud, Michele Natrella, Chris Graham, James Seddon, Frederic Van Dijk, and Alwyn J. Seeds, IEEE Journal of Selected Topics in Quantum Electronics, 24(2), 1–11 (2018). https://doi.org/10.1109/JSTQE.2017.2725444

5 Gbps wireless transmission link with an optically pumped uni-traveling carrier photodiode mixer at the receiver, Ahmad W. Mohammad, Haymen Shams, Katarzyna Balakier, Chris Graham, Michele Natrella, Alwyn J. Seeds, and Cyril C. Renaud, Optics Express, 26 (3), 2884-2890 (2018). https://doi.org/10.1364/OE.26.002884

Terahertz emission from localized modes in one-dimensional disordered systems, Y Zeng, G Liang, B Qiang, B Meng, H K Liang, S Mansha, J Li, Z Li, L Li, A G Davies, E H Linfield, Y Zhang, Y Chong, and Q J Wang, Photonics Research 6, 117–122 (2018), http://doi.org/10.1364/PRJ.6.000117

Terahertz master-oscillator power-amplifier quantum cascade laser with a grating coupler of extremely low reflectivity, H Zhu, H Zhu, F Wang, G Chang, C Yu, Q Yan, J Chen, L Li, A G Davies, E H Linfield, Z Tang, P Chen, W Lu, G Xu, and Li He, Optics Express 26, 1942–1953 (2018), https://doi.org/10.1364/OE.26.001942

Silver-based surface plasmon waveguide for terahertz quantum cascade lasers, Y J Han, L H Li, J Zhu, A Valavanis, J R Freeman, L. Chen, M. Rosamond, P Dean, A G Davies, and E H Linfield, Optics Express 26, 3814–3827 (2018), https://doi.org/10.1364/OE.26.003814

2017

Resonant terahertz probes for near-field scattering microscopy. T Siday, M Natrella, J Wu, H Liu, O Mitrofanov et al. Opt. Express 25 (22), 27874-27885 (2017). https://doi.org/10.1364/OE.25.027874

Optical side-band generation in THz Fabry-Perot laser cavities, Folland, T. G., Hua, L., Marshall, O. P., Khairuzzaman, M., Beere, H. E., Ritchie, D. A., & Chakraborty, S., Applied Physics Letters, 111(23) (2017), doi:10.1063/1.5001334

Coherent detection of THz laser signals in optical fiber systems, Folland, T. G., Marshall, O. P., Beere, H. E., Ritchie, D. A., & Chakraborty, S., Opt Express, 25(21), 25566-25573 (2017) https://doi.org/10.1364/OE.25.025566

Probing the Topological Surface State in Bi2Se3 Thin Films Using Temperature-Dependent Terahertz Spectroscopy, Kamboj, V. S., Singh, A., Ferrus, T., Beere, H. E., Duffy, L. B., Hesjedal, T., Barnes, C. H. W., Ritchie, D. A., ACS Photonics 4(11), 2711-2718 (2017), doi:10.1021/acsphotonics.7b00492

Contactless graphene conductivity mapping on a wide range of substrates with terahertz time-domain reflection spectroscopy, Lin, H., Braeuninger-Weimer, P., Kamboj, V. S., Jessop, D. S., Degl’Innocenti, R., Beere, H. E., Zeitler, J. A., Hofmann, S., Sci Rep, 7(1), 10625 (2017), doi:10.1038/s41598-017-09809-7

External amplitude and frequency modulation of a terahertz quantum cascade laser using metamaterial/graphene devices, Kindness, S. J., Jessop, D. S., Wei, B., Wallis, R., Kamboj, V. S., Xiao, L., Ren, Y., Braeuninger-Weimer, P., Aria, A. I., Hofman, S,. Beere, H. E., Ritchie, D. A., Degl’Innocenti, R., Sci Rep, 7(1), 7657 (2017), doi:10.1038/s41598-017-07943-w

Two-dimensional coherent spectroscopy of a THz quantum cascade laser: observation of multiple harmonics, S Markmann, H Nong, S Pal, T Fobbe, N Hekmat, R A Mohandas, P Dean, L Li, E H Linfield, A G Davies, A D Wieck, and N Jukam, Optics Express 25, 21753–21761 (2017), http://doi.org/10.1364/OE.25.021753

Injection locking of a terahertz quantum cascade laser to a telecommunications wavelength frequency comb, J R Freeman, L Ponnampalam, H Shams, R A Mohandas, C C Renaud, P Dean, L Li, A G Davies, A J Seeds, and E H Linfield, Optica 4, 1059–1064 (2017), http://doi.org/10.1364/OPTICA.4.001059

THz nanoscopy of plasmonic resonances with a quantum cascade laser, R Degl’Innocenti, R Wallis, B Wei, L Xiao, S J Kindness, O Mitrofanov, P Braeuninger-Weimer, S Hofmann, H E Beere, and D A Ritchie, ACS Photonics 4 (9), pp 2150–2157 (2017) https://doi.org/10.1021/acsphotonics.7b00687

Other Outputs

Related Programme grant awarded in Non-Ergodic Quantum Manipulation (Pepper, Ritchie et al), £7M 2019-2023.

University seminar delivered: Lucy Hale: “Aperture-type collection mode near-field microscopy and spectroscopy of individual sub-wavelength THz resonators,” November 2018, ETH Zurich, Zurich, Switzerland. 2018.

Lecture at Summer School: Oleg Mitrofanov: “THz near-field microscopy technique and applications with focus on aperture-type near-field imaging.” PETER Summer School, Oct 3-5, 2018, Brno, Czech Rep.

New Investigator Award, PI Dr R Degl’Innoncenti: (EPSRC Reference: EP/S019383/1) “THz metamaterial/graphene optoelectronic modulators” 15/1/2019 to14/1/2021.

Aligned grant awarded: EPSRC grant EP/R00501X: “The Physics of plasmonic gain in low-dimensional electronic systems”, J Cunningham, C D Wood, E H Linfield, and A G Davies, £527,764, Dec 2017 for three years (part of a ~£1M consortium, collaborative with Imperial College).

Aligned iCASE award from NPL, start date Oct 2018 for four years, “Metrology for sub-mm-wave communications and electronics”, J Cunningham, N Ridler, and R Clarke.

THz QCL imaging instrument presented at KTN Emerging Technologies and Industries Showcase events: Emerging Imaging Technologies, 1st May, London.

Kasia Balakier awarded an EPSRC UKRI Innovation Fellowship (2018).

Video Production on THz applications for public engagement activity of HyperTHz programme grant.