Items where authors include "Freeman, JR"
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Knox, CS orcid.org/0000-0002-4673-5649, Vaughan, MT orcid.org/0000-0002-8336-2183, Burnett, AD orcid.org/0000-0003-2175-1893 et al. (5 more authors) (2022) Effects of structural ordering on infrared active vibrations within Bi₂(Te₍₁—ₓ₎Seₓ)₃. Physical Review B, 106 (24). 245203. ISSN 2469-9950
Beckert, A, Grimm, M, Hermans, RI et al. (8 more authors) (2022) Precise determination of the low-energy electronuclear Hamiltonian of LiY1−x HoxF4. Physical Review B, 106 (11). 115119. ISSN 2469-9950
Riepl, J, Raab, J, Abajyan, P et al. (11 more authors) (2021) Field-resolved high-order sub-cycle nonlinearities in a terahertz semiconductor laser. Light: Science and Applications, 10. 246. ISSN 2047-7538
Chudpooti, N, Duangrit, N, Burnett, AD orcid.org/0000-0003-2175-1893 et al. (8 more authors) (2021) Wideband Dielectric Properties of Silicon and Glass Substrates for Terahertz Integrated Circuits and Microsystems. Materials Research Express, 8 (5). 056201. ISSN 2053-1591
Goulain, P, Koulouklidis, AD, Manceau, J-M et al. (9 more authors) (2021) Femtosecond Broadband Frequency Switch of Terahertz Three-Dimensional Meta-Atoms. ACS Photonics, 8 (4). pp. 1097-1102. ISSN 2330-4022
Mohandas, RA, Ponnampalam, L, Li, L orcid.org/0000-0003-4998-7259 et al. (5 more authors) (2020) Exact frequency and phase control of a terahertz laser. Optica, 7 (9). pp. 1143-1149. ISSN 2334-2536
Kundu, I orcid.org/0000-0002-3564-1903, Bacon, DR, Dean, P orcid.org/0000-0002-3950-4359 et al. (4 more authors) (2020) Programmable, Transform-Limited Pulses from a Terahertz Quantum Cascade Laser. ACS Photonics, 7 (9). pp. 2423-2428. ISSN 2330-4022
Bacon, DR, Gill, TB orcid.org/0000-0002-1191-6466, Rosamond, M et al. (7 more authors) (2020) Photoconductive Arrays on Insulating Substrates for High-Field Terahertz Generation. Optics Express, 28 (12). pp. 17219-17231. ISSN 1094-4087
Kundu, I orcid.org/0000-0002-3564-1903, Freeman, JR orcid.org/0000-0002-5493-6352, Dean, P orcid.org/0000-0002-3950-4359 et al. (3 more authors) (2020) Wideband Electrically Controlled Vernier Frequency Tunable Terahertz Quantum Cascade Laser. ACS Photonics, 7 (3). pp. 765-773. ISSN 2330-4022
Kundu, I, Freeman, JR orcid.org/0000-0002-5493-6352, Dean, P orcid.org/0000-0002-3950-4359 et al. (3 more authors) (2020) Terahertz photonic integrated circuit for frequency tuning and power modulation. Optics Express, 28 (4). pp. 4374-4386. ISSN 1094-4087
Meng, K, Park, SJ, Burnett, AD et al. (12 more authors) (2019) Increasing the sensitivity of terahertz split ring resonator metamaterials for dielectric sensing by localized substrate etching. Optics Express, 27 (16). pp. 23164-23172. ISSN 1094-4087
Garufo, A, Sberna, PM, Carluccio, G et al. (9 more authors) (2019) A Connected Array of Coherent Photoconductive Pulsed Sources to Generate mW Average Power in the Submillimeter Wavelength Band. IEEE Transactions on Terahertz Science and Technology, 9 (3). pp. 221-236. ISSN 2156-342X
Kundu, I orcid.org/0000-0002-3564-1903, Wang, F, Qi, X et al. (16 more authors) (2018) Author Correction: Ultrafast switch-on dynamics of frequency-tuneable semiconductor lasers. Nature Communications, 9 (1). 5181. ISSN 2041-1723
Kundu, I orcid.org/0000-0002-3564-1903, Dean, P, Valavanis, A orcid.org/0000-0001-5565-0463 et al. (6 more authors) (2018) Continuous frequency tuning with near constant output power in coupled Y-branched terahertz quantum cascade lasers with photonic lattice. ACS Photonics, 5 (7). pp. 2912-2920. ISSN 2330-4022
Garufo, A, Carluccio, G, Freeman, JR orcid.org/0000-0002-5493-6352 et al. (5 more authors) (2018) Norton Equivalent Circuit for Pulsed Photoconductive Antennas - Part II: Experimental Validation. IEEE Transactions on Antennas and Propagation, 66 (4). pp. 1646-1659. ISSN 0018-926X
Han, Y orcid.org/0000-0003-2141-3077, Li, LH orcid.org/0000-0003-4998-7259, Zhu, J et al. (7 more authors) (2018) Silver-based surface plasmon waveguide for terahertz quantum cascade lasers. Optics Express, 26 (4). pp. 3815-3827. ISSN 1094-4087
Freeman, JR orcid.org/0000-0002-5493-6352, Ponnampalam, L, Shams, H et al. (7 more authors) (2017) Injection locking of a terahertz quantum cascade laser to a telecommunications wavelength frequency comb. Optica, 4 (9). pp. 1059-1064.
Keeley, JT orcid.org/0000-0001-5251-6648, Freeman, JR, Bertling, K et al. (9 more authors) (2017) Measurement of the emission spectrum of a semiconductor laser using laser-feedback interferometry. Scientific Reports, 7. 7236. ISSN 2045-2322
Mohandas, RA, Freeman, JR orcid.org/0000-0002-5493-6352, Natrella, M et al. (10 more authors) (2017) Terahertz generation mechanism in nano-grating electrode photomixers on Fe-doped InGaAsP. Optics Express, 25 (9). pp. 10177-10188. ISSN 1094-4087
Han, YJ orcid.org/0000-0003-2141-3077, Li, LH orcid.org/0000-0003-4998-7259, Grier, A et al. (9 more authors) (2016) Extraction-controlled terahertz frequency quantum cascade lasers with a diagonal LO-phonon extraction and injection stage. Optics Express, 24 (25). pp. 28583-28593. ISSN 1094-4087
Bacon, DR, Burnett, AD orcid.org/0000-0003-2175-1893, Swithenbank, M orcid.org/0000-0002-6146-1818 et al. (8 more authors) (2016) Free-space terahertz radiation from a LT-GaAs-on-quartz large-area photoconductive emitter. Optics Express, 24 (23). pp. 26986-26997. ISSN 1094-4087
Hatem, O, Freeman, JR, Cunningham, JE et al. (5 more authors) (2016) Generation of Terahertz Radiation from Fe-doped InGaAsP Using 800 nm to 1550 nm Pulsed Laser Excitation. Journal of Infrared, Millimeter and Terahertz Waves, 37 (5). pp. 415-425. ISSN 1866-6892
Mohandas, RA, Freeman, JR, Rosamond, MC et al. (12 more authors) (2016) Generation of continuous wave terahertz frequency radiation from metal-organic chemical vapour deposition grown Fe-doped InGaAs and InGaAsP. Journal of Applied Physics, 119 (15). 153103. ISSN 1089-7550
Bacon, DR, Freeman, JR, Mohandas, RA et al. (4 more authors) (2016) Gain recovery time in a terahertz quantum cascade laser. Applied Physics Letters, 108 (8). 081104. ISSN 0003-6951
Mueckstein, R, Natrella, M, Hatem, O et al. (10 more authors) (2015) Near-field analysis of terahertz pulse generation from photo-excited charge density gradients. IEEE Transactions on Terahertz Science and Technology, 5 (2). 260 - 267. ISSN 2156-342X
Brewer, A, Freeman, JR, Cavalie, P et al. (5 more authors) (2014) Coherent detection of metal-metal terahertz quantum cascade lasers with improved emission characteristics. Applied Physics Letters, 104 (8). ARTN 081107. ISSN 0003-6951
Freeman, JR, Maysonnave, J, Beere, HE et al. (3 more authors) (2013) Electric field sampling of modelocked pulses from a quantum cascade laser. Optics Express, 21 (13). 13. 16162 - 16169. ISSN 1094-4087
Freeman, JR, Maysonnave, J, Khanna, S et al. (4 more authors) (2013) Laser-seeding dynamics with few-cycle pulses: Maxwell-Bloch finite-difference time-domain simulations of terahertz quantum cascade lasers. Physical Review A - Atomic, Molecular, and Optical Physics, 87 (6). 063817. ISSN 1050-2947
Conference or Workshop Item
Dunn, A orcid.org/0000-0002-7369-1469, Bacon, DR, Gill, TB et al. (6 more authors) (2020) Development of a Broadband Multidimensional THz Spectrometer. In: IRMMW-THZ 2020, 08-13 Nov 2020, Online/ Buffalo, NY, USA.
Freeman, JR orcid.org/0000-0002-5493-6352, Ponnampalam, L, Shams, H et al. (7 more authors) (2018) Quasi-optical injection locking of a terahertz quantum cascade laser to a fiber-based frequency comb. In: IQCLSW 2018, 02-07 Sep 2018, Cassis, France. (Unpublished)
Kundu, I orcid.org/0000-0002-3564-1903, Wang, F, Qi, X et al. (16 more authors) (2018) Dependence of switch-on time on Vernier comb alignment in frequency tunable lasers. In: 8th International Quantum Cascade Laser School and Workshop 2018, 02-07 Sep 2018, Cassis, France. (Unpublished)
Kundu, I orcid.org/0000-0002-3564-1903, Dean, P, Valavanis, A orcid.org/0000-0001-5565-0463 et al. (6 more authors) (2018) Continuous frequency tuning with near constant output power in coupled Y-branched terahertz quantum cascade lasers with photonic lattice. In: 8th International Quantum Cascade Laser School and Workshop 2018, 02-07 Sep 2018, Cassis, France. (Unpublished)
Chowdhury, S, Freeman, JR, Rosamond, MC et al. (6 more authors) (2015) Study of the effect of annealing temperature on low-temperature-grown-GaAs photomixers. In: UK Semiconductors 2015, 01-02 Jul 2015, Sheffield, UK.
Mueckstein, R, Natrella, M, Hatem, O et al. (10 more authors) (2015) THz pulse generation by charge density gradients investigated by near-field microscopy. In: Optical Terahertz Science & Technology Conference, 08-13 Mar 2015, San Diego, CA.
Han, YJ, Grier, A, Valavanis, A orcid.org/0000-0001-5565-0463 et al. (7 more authors) Modelling of three-well extraction-controlled terahertz frequency quantum cascade lasers using an extended density matrix approach. In: International Quantum Cascade Lasers School and Workshop, 04-09 Sep 2016, Cambridge, UK.
Hussein, M, Zhou, J, Huang, Y et al. (8 more authors) Second-Order Terahertz Bandpass Frequency Selective Surface with Stable Angular Responses. In: IET Colloquium on Millimetre-wave and Terahertz Engineering & Technology 2017, 30 Mar 2017, Glasgow, UK. (Unpublished)
Han, YJ, Li, LH, Chen, L et al. (9 more authors) Three-well terahertz frequency quantum cascade lasers with a common LO-phonon extraction and injection stage. In: Intersubband Transitions in Quantum Wells (ITQW) 2015, 06-11 Sep 2015, Vienna. (Unpublished)
Proceedings Paper
Kidd, C, Rosamond, MC, Chen, L et al. (5 more authors) (2022) Improving the Efficiency of LT-GaAs Photoconductive Arrays on Optically Transparent Substrates for High Field THz Generation. In: 2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz). 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 28 Aug - 02 Sep 2022, Delft, The Netherlands. IEEE .
Riepl, J, Raab, J, Abajyan, P et al. (11 more authors) (2022) Sub-cycle high-order nonlinearities in a terahertz quantum cascade laser. In: 2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz). 2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 28 Aug - 02 Sep 2022, Delft, Netherlands. IEEE , pp. 1-2. ISBN 978-1-7281-9428-8
Gill, TB orcid.org/0000-0002-1191-6466, Kidd, C, Dean, P et al. (8 more authors) (2022) Ultrafast Two-Dimensional Time-Domain Spectroscopy of Hydrogen-Like Impurity Centers in Germanium. In: Proceedings of the 2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz). 2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 28 Aug - 02 Jun 2022, Delft, The Netherlands. IEEE . ISBN 978-1-7281-9428-8
Riepl, J, Raab, J, Abajyan, P et al. (11 more authors) (2022) Field-resolved high-order nonlinearities in a free-running terahertz quantum cascade laser. In: Proceedings of the 2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings. 2022 Conference on Lasers and Electro-Optics (CLEO), 15-20 May 2022, San Jose, CA, USA. IEEE , pp. 1-2. ISBN 9781957171050
Riepl, J, Raab, J, Abajyan, P et al. (11 more authors) (2022) Field-resolved high-order nonlinearities in a free-running terahertz quantum cascade laser. In: Conference on Lasers and Electro-Optics, Technical Digest Series. CLEO: 2022, 15-20 May 2022, San Jose, California, United States. Optica Publishing Group . ISBN 978-1-957171-05-0
Gill, TB orcid.org/0000-0002-1191-6466, Bacon, DR, Dean, P orcid.org/0000-0002-3950-4359 et al. (5 more authors) (2021) Broadband Nonlinear Spectroscopy of Hydrogen-Like Levels in Ge:As. In: 2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). 2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 08-13 Nov 2020, Buffalo, NY, USA. IEEE .
Park, SJ orcid.org/0000-0001-8606-191X, Meng, K, Burnett, AD et al. (12 more authors) (2020) Increasing the sensitivity of terahertz metamaterials for dielectric sensing by substrate etching. In: 2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). 2020 45th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 08-13 Nov 2020, Buffalo, NY, USA. IEEE . ISBN 978-1-7281-6621-6
Garufo, A, Sberna, P, Carluccio, G et al. (10 more authors) (2019) Pulsed Photoconductive Connected Slot Array Operating at the Sub-mm Wavelength Band. In: 2019 49th European Microwave Conference (EuMC). 2019 49th European Microwave Conference (EuMC), 30 Sep - 01 Oct 2019, Paris, France. IEEE , pp. 820-823. ISBN 9782874870552
Ponnampalam, L, Fice, MJ, Renaud, C et al. (5 more authors) (2019) Continuously Tunable Coherent THz Synthesizer, Referenced to Primary Frequency Standards. In: 2019 IEEE International Topical Meeting on Microwave Photonics, MWP 2019. 2019 International Topical Meeting on Microwave Photonics, MWP 2019, 07-10 Oct 2019, Ottawa, ON, Canada. IEEE . ISBN 9781728136257
Mohandas, RA, Ponnampalam, L, Seeds, A et al. (4 more authors) (2019) High-resolution frequency and phase control of a terahertz laser. In: 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). 44th International Conference on Infrared, Millimeter, and Terahertz Waves, 01-06 Sep 2019, Paris, France. IEEE . ISBN 9781538682852
Bacon, DR, Rosamond, M, Gill, T orcid.org/0000-0002-1191-6466 et al. (7 more authors) (2019) Photoconductive Arrays for High-Field Terahertz Generation. In: 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). 44th International Conference on Infrared, Millimeter, and Terahertz Waves, 01-06 Sep 2019, Paris, France. IEEE .
Garufo, A, Sberna, P, Carluccio, G et al. (10 more authors) (2019) Pulsed Photoconductive Connected Slot Array Operating at the Sub-mm Wavelength Band. In: Proceedings of the 14th European Microwave Integrated Circuits Conference. 14th European Microwave Integrated Circuits Conference, 30 Sep - 01 Oct 2019, Paris, France. , pp. 266-269. ISBN 978-2-87487-056-9
Kundu, I orcid.org/0000-0002-3564-1903, Wang, F, Qi, X et al. (16 more authors) (2019) WC2.3 - Probing Ultrafast Switch-on Dynamics of Frequency Tuneable Semiconductor Lasers Using Terahertz Time-domain Spectroscopy (Invited). In: Proceedings of the 2019 IEEE Photonics Society Summer Topical Meeting Series (SUM). 2019 IEEE Photonics Society Summer Topical Meeting Series (SUM), 08-10 Jul 2019, Ft. Lauderdale, FL, USA. IEEE . ISBN 978-1-7281-0597-0
Garufo, A, Sberna, P, Carluccio, G et al. (6 more authors) (2018) Leaky Lens Antenna as Optically Pumped Pulsed THz Emitter. In: 2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). IRMMW-THz 2018, 09-14 Sep 2018, Nagoya, Japan. IEEE . ISBN 978-1-5386-3809-5
Kundu, I orcid.org/0000-0002-3564-1903, Dean, P, Valavanis, A orcid.org/0000-0001-5565-0463 et al. (6 more authors) (2018) Continuous frequency tuning of Y-branched terahertz quantum cascade lasers with photonic lattice. In: Conference on Lasers and Electro-Optics, OSA Technical Digest (online). CLEO:2018, 13-18 May 2018, San Jose, CA, USA. Optical Society of America . ISBN 978-1-943580-42-2
Garufo, A, Carluccio, G, Freeman, JR orcid.org/0000-0002-5493-6352 et al. (5 more authors) (2017) Characterization of the THz quasi-optical channel for the measurement of the power radiated by photoconductive antennas. In: 42nd International Conference on Infrared, Millimeter, and Terahertz Waves. IRMMW-THz 2017, 27 Aug - 01 Sep 2017, Cancun, Mexico. IEEE . ISBN 978-1-5090-6050-4
Bacon, DR, Burnett, AD, Swithenbank, M et al. (8 more authors) (2017) Investigation into free-space terahertz radiation from a LT-GaAs-on-quartz photoconductive emitter. In: International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz. IRMMW-THz 2017, 27 Aug - 01 Sep 2017, Cancun, Mexico. IEEE . ISBN 978-1-5090-6050-4
Bacon, DR, Freeman, JR, Mohandas, RA et al. (4 more authors) (2016) Pump-probe measurements of gain in a terahertz quantum cascade laser. In: 2016 41st International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz). 41st International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz) 2016, 25-30 Sep 2016, Copenhagen, Denmark. IEEE . ISBN 9781467384858
Nong, H, Wang, F, Maussang, K et al. (10 more authors) (2016) Short pulse generation and dispersion in THz quantum cascade lasers. In: 2016 41st International Conference on Infrared, Millimeter, and Terahertz waves. 41st International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz 2016), 25-30 Sep 2016, Copenhagen, Denmark. IEEE . ISBN 9781467384858
Mohandas, RA, Freeman, JR, Rosamond, MC et al. (8 more authors) (2016) Terahertz emission mechanism and laser excitation position dependence of nano-grating electrode photomixers. In: 2016 41st International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz). 41st International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 25-30 Sep 2016, Copenhagen, Denmark. IEEE . ISBN 9781467384858
Nong, H, Wang, FH, Maussang, K et al. (10 more authors) (2016) Short pulse generation from active mode-locked THz quantum cascade lasers. In: UNSPECIFIED International Quantum Cascade Lasers School and Workshop, 04-09 Sep 2016, Cambridge, UK. .
Kundu, I, Wang, F, Qi, X et al. (12 more authors) (2016) Time-resolved analysis of Vernier selection dynamics in coupled-cavity terahertz quantum-cascade lasers. In: UNSPECIFIED International Quantum Cascade Lasers School and Workshop, 04-09 Sep 2016, Cambridge, UK. .
Wang, F, Maussang, K, Moumdji, S et al. (9 more authors) (2016) Terahertz pulse generation from quantum cascade lasers. In: 2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz). International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 23-28 Aug 2015, Hong Kong. IEEE . ISBN 9781479982738
Wang, F, Maussang, K, Moumdji, S et al. (9 more authors) (2015) Terahertz pulse generation from quantum cascade lasers. In: 2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz). International Conference on Intersubband Transitions in Quantum Wells (ITQW), 06-11 Sep 2015, Vienna, Austria. IEEE . ISBN 978-1-4799-8272-1
Mohandas, RA, Freeman, JR orcid.org/0000-0002-5493-6352, Rosamond, MC et al. (10 more authors) (2015) Generation of continuous wave terahertz radiation from Fe-doped InGaAs and InGaAsP. In: IEEE 2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz). 40th International Conference on Infrared, Millimeter, and Terahertz Waves, 23-28 Aug 2015, Hong Kong. IEEE .
Maussang, K, Wang, F, Brewer, A et al. (11 more authors) (2014) Injection seeding of metal-metal terahertz quantum cascade lasers. In: International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz. International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz, 14-19 Sep 2014, Tucson, AZ, USA. IEEE Computer Society . ISBN 9781479938773
Mueckstein, R, Hatem, O, Natrella, M et al. (10 more authors) (2014) Mapping the distribution of photo-currents responsible for generation of terahertz pulses at semiconductor surfaces. In: International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz. 39th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 14-19 Sep 2014, Tucson, AZ, USA. IEEE Computer Society . ISBN 9781479938773
Valavanis, A, Dean, P, Li, LH et al. (16 more authors) (2014) High-power (> 1 Watt) terahertz frequency quantum cascade lasers for stand-off imaging. In: SET-210 Specialist Meeting on Novel infrared laser technology for modern battlefield requirements. SET-210 Specialist Meeting on Novel infrared laser technology for modern battlefield requirements, 24-25 Jul 2014, Salisbury, UK. NATO .
Han, YJ, Li, LH, Zhu, JX et al. (5 more authors) Silver-based surface plasmon waveguide for terahertz quantum cascade lasers. In: UNSPECIFIED IQCLSW2014 International Quantum Cascade Lasers School and Workshop, 07-12 Sep 2014, Policoro, Italy. . (Unpublished)
Li, LH, Chen, L, Zhu, JX et al. (5 more authors) THz quantum cascade lasers with output power over 1 W. In: UNSPECIFIED IQCLSW2014 International Quantum Cascade Lasers School and Workshop, 07-12 Sep 2014, Policoro, Italy. . (Unpublished)