Publications & Results

Journal Papers

2019

Giant optical nonlinearity cancellation in quantum wells, S Houver, A Lebreton, T A S Pereira, R Ferreira, G Xu, R Colombelli, I Kundu, L Li, E H Linfield, A G Davies, J Mangeney, J Tignon, S S Dhillon, Science Advances, In the press

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). DOI: 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). DOI: 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). DOI: 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) DOI: 10.1021/acsphotonics.7b00687

Conference Papers

2019

Conference abstract accepted: Oleg Mitrofanov et al.: “Efficient Terahertz Detection with Photoconductive Metasurfaces.” OTST2019.

Conference abstract accepted: Lucy Hale, et al.: “Aperture-type Collection Mode Near-Field Microscopy and Spectroscopy of Individual Sub-Wavelength THz Resonators” OTST2019.

Invited talk to the IEEE MTT-S International Wireless Symposium (IEEE IWS 2019) May 19-22, 2019 in Guangzhou, China. R Degl’Innocenti. Title: “Metamaterial/graphene active terahertz modulators”

Conference abstract accepted (poster): T. Siday and O. Mitrofanov: “Scattering Efficiency of Resonant Terahertz Near-field Probes” OTST2019.

Reshma Anamari Mohandas, Lalitha Ponnampalam, Lianhe H. Li, Cyril C. Renaud, Alwyn J. Seeds, Paul Dean, Edmund H. Linfield, Giles A. Davies, Joshua R. Freeman, “Phase control of a terahertz quantum cascade laser using an optical injection phase-lock loop,” Photonics West, 2019

2018

THz Over Fibre for High Capacity Wireless Transmission: Tutorial Paper, A Seeds, K Balakier, C Graham, X Lin, C Renaud, M Fice, H Shams, IEEE Photonics Conference (IPC), pp. 1 – 2, September 2018.

An efficient terahertz detector based on an optical hybrid cavity, Tom Siday, Robert J Thompson, Samuel Glass, Ting-Shan Luk, John L Reno, Igal Brener, Oleg Mitrofanov, Proceedings Volume 10531, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XI; 1053109 (2018) https://doi.org/10.1117/12.2290971

Quasi-optical injection locking of a terahertz quantum cascade laser to a fiber-based frequency comb, Joshua R. Freeman, Reshma Anamari Mohandas, Lalitha Ponnampalam, Lianhe H. Li, Cyril C. Renaud, Alwyn J. Seeds, Paul Dean, Edmund H. Linfield and Giles A. Davies, presented at EOS-TST2018 (Berlin) (invited).

Quasi-optical injection locking of terahertz quantum cascade lasers, Joshua R. Freeman, Reshma Anamari Mohandas, Lalitha Ponnampalam, Lianhe H. Li, Cyril C. Renaud, Alwyn J. Seeds, Paul Dean, Edmund H. Linfield and Giles A. Davies, presented at IQCLSW 2018 (Cassis, France) (invited).

Leaky Lens Antenna as Optically Pumped Pulsed THz Emitter, Garufo, A., Sberna, P., Carluccio, G., Bueno, J., Freeman, J. R., Llombart, N., Linfield, E. H., Davies, A. G. and Neto, A. (2018). In 2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). Nagoya, Japan: IEEE. doi:10.1109/IRMMW-THz.2018.8509897

UK THz Network Conference presentation (oral): T.Siday, M Natrella, J Wu, H Liu, O Mitrofanov, “Resonant scattering probes for terahertz near-field microscopy”, Dec 11, 2018, Warwick, UK.

Oleg Mitrofanov (invited): “Near-field probing of highly confined resonant THz fields.” At Frontiers of photonics, plasmonics and electronics with 2D nanosystems, July 16, 2018, Erice, Italy.

Monolithically integrated phase locked semiconductor lasers (invited), K Balakier, M. Fice, C Renaud, L Ponnampalam, F van Dijk, A Seeds, 2018 Asia Communications and Photonics Conference, October 2018.

A Photonics Enabled Millimetre Wave Frequency Domain Spectrometer for Glucose Concentration Sensing, J Seddon, K Balakier, X Lin, C Graham, A Seeds, C Renaud, IRMMW-THz, 2018. DOI: 10.1109/IRMMW-THz.2018.8510467

External cavity tuned terahertz quantum cascade laser with a metamaterial/graphene device, N. W. Almond, S. J. Kindness, B. Wei, R. Wallis, V. S. Kamboj, P. Braeuninger-Weimer, S. Hofmann, H. E. Beere, R. Degl’Innocenti, D. A. Ritchie, oral presentation at IQCLSW 2018 conference, Cassis, France 2–7 September 2018.

Tuneable Optical Frequency Comb Generator for THz Spectroscopy, Ponnampalam, L; Fice, MJ; Shams, H; Renaud, CC; Seeds, AJ, IRMMW-THz, Nagoya, Japan 2018. https://doi.org/10.1109/IRMMW-THz.2018.8510370.

Continuous frequency tuning of Y-branched terahertz quantum cascade lasers with photonic lattice, Iman Kundu, Paul Dean, Alexander Valavanis, Joshua R. Freeman, Mark C. Rosamond, Lianhe Li, Yingjun Han, Edmund H. Linfield, and A. Giles Davies, CLEO USA, San Jose, CA, USA, 13 – 18 May 2018.

Active optoelectronic frequency modulation of metamaterial/graphene device with coupled resonators, S. J. Kindness, N. W. Almond, R. Wallis, B. Wei, V. S. Kamboj, P. Braeuninger-Weimer, S. Hofmann, H. E. Beere, D. A. Ritchie, and R. Degl’lnnocenti, CLEO USA, San Jose, CA, USA, 13 – 18 May 2018.

Amplitude Stabilization of a Terahertz Quantum Cascade Laser with an External Metamaterial Amplitude Modulator, 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, CLEO USA, San Jose, CA, USA, 13 – 18 May 2018.

Metamaterial/graphene amplitude and frequency modulators for the active control of terahertz quantum cascade lasers. (invited) R. Degl’Innocenti, S. Kindness, B. Wei, N. Almond, R. Wallis, V. S. Kamboj, P. Braeuninger-Weimar, S. Hofmann, H. E. Beere, D. Ritchie, SPIE Optics+Photonics, San Diego, CA, USA, 19 – 23 August 2018.

Terahertz scattering based scanning near field microscopy (THz s-SNOM) based on self-mixing in quantum cascade laser (invited), H.E. Beere, EMN Meeting on Terahertz, April 16 – 20, Amsterdam, Netherlands.

Spectrally Efficient SSB signals for W-band Links Enabled by Kramers-Kronig Receiver, Luis Gonzalez-Guerrero, H. Shams, Irshaad Fatadin, M. J. Fice, Mira Naftaly, A. J. Seeds, and C. C. Renaud, OFC 2018. https://doi.org/10.1364/OFC.2018.Th2A.61

Digital Radio over Fiber Distribution using Millimetre Wave Bridging, H. Shams, T. Li, C. C. Renaud, A. J. Seeds, R. Penty, M. Fice, and I. White, 17856094, OFC/NFOEC 2018 (2018), pp. 2–4.

Resonant scattering probes for terahertz near-field microscopy (Invited), T Siday, M Natrella, J Wu, H Liu,and O Mitrofanov, 31 January 2018, SPIE Photonics West 2018, San Francisco, CA, USA. https://doi.org/10.1117/12.2290903

Near-field probing of modes excited in terahertz double-metal resonators (Invited), O Mitrofanov, Y Todorov, A Mottaghizadeh, D Gacemi, C Sirtori, I Brener, and J Reno, 31 January 2018, SPIE Photonics West, San Francisco, CA, USA.

Sub-wavelength near field imaging techniques at terahertz frequencies (Invited), M C Giordano, L Viti, O Mitrofanov, G Scamarcio, S Mastel, R Hillenbrand, D Ercolani, L Sorba, and M S Vitiello, 29 January 2018, SPIE Photonics West, San Francisco, CA, USA. https://doi.org/10.1117/12.2291518

Quasi-optical injection locking of a terahertz quantum cascade laser to a fiber-based frequency comb, J R Freeman, L Ponnampalam, H Shams, R A Mohandas, C Renaud, P Dean, L Li, A G Davies, A Seeds, and E H Linfield, 31 January 2018, SPIE OPTO, San Francisco, CA, USA.

Contactless graphene conductivity mapping and hybrid graphene/plasmonic optoelectronic devices, R. Degl’Innocenti and H. Lin, UK-China 2D Materials Conference, Manchester, 24-26 January, 2018.

2017

Characterization of the THz quasi-optical channel for the measurement of the power radiated by photoconductive antennas, Garufo, A., Carluccio, G., Freeman, J. R., Bacon, D. R., Llombart, N., Linfield, E. H., Davies, A. G. and Neto, A. (2017). In 42nd International Conference on Infrared, Millimeter, and Terahertz Waves. Cancun, Mexico: IEEE. doi:10.1109/IRMMW-THz.2017.8066944

Optical phase lock loop as high-Q filter for optical frequency comb line selection, K Balakier, H Shams, MJ Fice, L Ponnampalam, CS Graham, CC Renaud, AJ Seeds, 17398226, International Topical Meeting on Microwave Photonics (MWP) 2017. DOI: 10.1109/MWP.2017.8168727

Active photonic integrated filter for optical comb line selection (Post deadline), K Balakier, H Shams, MJ Fice, L Ponnampalam, C Graham, C Renaud, AJ Seeds, IEEE Photonics Conference, 30th Annual Conference of the IEEE Photonics Society, 2017.

Photonic integrated circuit optical phase lock loop tuneable active filter, K Balakier, H Shams, MJ Fice, L Ponnampalam, CS Graham, CC Renaud, AJ Seeds, 17545225, Photonics Conference (IPC) Part II, 2017. DOI: 10.1109/PC2.2017.8283409

Haymen Shams, Katarzyna Balakier, Martyn J Fice, L Ponnampalam, CS Graham, Cyril C Renaud, Alwyn J Seeds, Frédéric van Dijk, “Coherent frequency tuneable thz wireless signal generation using an optical phase lock loop system,” International Topical Meeting on Microwave Photonics (MWP), pp. 1 – 4, 2017. DOI: 10.1109/MWP.2017.8168638

Katarzyna Balakier, Martyn J Fice, Lalitha Ponnampalam, Chris S Graham, Alwyn J Seeds, Cyril C Renaud, “Monolithically integrated optical phase lock loop with 1 THz tuneability,” 42nd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), pp. 1-2, 2017 DOI: 10.1109/IRMMW-THz.2017.8067102

Oleg Mitrofanov, “Hybrid cavity for photo-conductive detectors with nanoantenna arrays and distributed Bragg reflectors,” Proceedings Volume 10353, Optical Sensing, Imaging, and Photon Counting: Nanostructured Devices and Applications 2017; 103530J (2017) https://doi.org/10.1117/12.2275566

Oleg Mitrofanov, “Terahertz near-field microscopy: Science, Technology, and Insights,” International Conference on Infrared, Millimeter and Terahertz Waves – IRMMW-THz 2017.

Thomas Siday, Robert J Thompson, Samuel Glass, Ting-Shan Luk, John L Reno, Igal Brener, Oleg Mitrofanov, “Designing an efficient hybrid optical cavity,” International Conference on Infrared, Millimeter and Terahertz Waves – IRMMW-THz 2017. DOI: 10.1109/IRMMW-THz.2017.8066961

Oleg Mitrofanov ; Leonardo Viti ; Maria Caterina Giordano ; Enrico Dardanis ; Daniele Ercolani ; Antonio Politano ; Lucia Sorba ; Miriam S. Vitiello, “Near-Field microscopy with phase sensitive coherent detection employing quantum cascade lasers,” 42nd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)-2017. DOI: 10.1109/IRMMW-THz.2017.8067244

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.