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Electronics Letters, ISSN 0013-5194, 2/2014, Volume 50, Issue 4, pp. 309 - 311
...Terahertz quantum cascade lasers with >1 W output powers Lianhe Li, Li Chen, Jingxuan Zhu, J. Freeman, P. Dean, A. Valavanis, A.G. Davies and E.H. Linfi eld... 
Photonics | ENGINEERING, ELECTRICAL & ELECTRONIC
Journal Article
Journal of physics. D, Applied physics, ISSN 1361-6463, 2017, Volume 50, Issue 4, p. 043001
Science and technologies based on terahertz frequency electromagnetic radiation (100 GHz-30 THz) have developed rapidly over the last 30 years. For most of the... 
terahertz | semiconductors | time-domain spectroscopy | PHYSICS, APPLIED | PERFORMANCE | THZ | PHOTOCONDUCTIVE EMITTERS | QUANTUM-CASCADE LASERS | RADIATION | NEAR-FIELD | GENERATION | EX-VIVO | METAL WAVE-GUIDES | NUCLEAR PHYSICS AND RADIATION PHYSICS | INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY | ENGINEERING
Journal Article
Journal of physics. D, Applied physics, ISSN 1361-6463, 2014, Volume 47, Issue 37, pp. 374008 - 22
The terahertz (THz) frequency quantum cascade laser (QCL) is a compact source of THz radiation offering high power, high spectral purity and moderate... 
terahertz | imaging | quantum cascade lasers | LOCAL OSCILLATOR | EXPLOSIVES | PHYSICS, APPLIED | HIGH-TEMPERATURE | THZ | PHASE-LOCKING | IDENTIFICATION | SPECTROSCOPY | FREQUENCY | INTERFEROMETRY | EMISSION | Imaging | Cascades | Coherence | Reflection | Mapping | Spectra | Diffusion | Three dimensional
Journal Article
Nature (London), ISSN 1476-4687, 2009, Volume 457, Issue 7226, pp. 174 - 178
Semiconductor lasers based on two-dimensional photonic crystals(1,2) generally rely on an optically pumped central area, surrounded by un- pumped, and... 
SEMICONDUCTOR-LASERS | DESIGN | CAVITIES | RESONATORS | WAVE-GUIDES | MULTIDISCIPLINARY SCIENCES | QUANTUM-CASCADE LASERS | Usage | Structure | Quantum electrodynamics | Analysis | Terahertz radiation | Crystals | Design | Band structure | Technological change | Molecular beam epitaxy | Boundary conditions | Environmental monitoring | GAAS | Crystal structure
Journal Article
Electronics Letters, ISSN 0013-5194, 6/2017, Volume 53, Issue 12, pp. 799 - 800
...Multi-Watt high-power THz frequency quantum cascade lasers L.H. Li ✉ , L. Chen, J.R. Freeman, M. Salih, P. Dean, A.G. Davies and E.H. Linfi eld Multi-Watt high... 
Photonics | ENGINEERING, ELECTRICAL & ELECTRONIC
Journal Article
Applied Physics Letters, ISSN 0003-6951, 09/2004, Volume 85, Issue 10, pp. 1674 - 1676
We report the operation of a quantum cascade laser emitting at a 103 mum wavelength (2.9 THz). The active region is based on a bound-to-continuum design... 
PHYSICS, APPLIED | MECHANISMS | TEMPERATURE | MU-M
Journal Article
Nature (London), ISSN 1476-4687, 2002, Volume 417, Issue 6885, pp. 156 - 159
Semiconductor devices have become indispensable for generating electromagnetic radiation in everyday applications. Visible and infrared diode lasers are at the... 
INTERSUBBAND EMISSION | SUPERLATTICES | MULTIDISCIPLINARY SCIENCES | MU-M | QUANTUM-CASCADE LASERS | RADIATION | LAMBDA | CYCLE | Semiconductors | Lasers | Prototypes | Physics
Journal Article
Applied Physics Letters, ISSN 0003-6951, 04/2015, Volume 106, Issue 16, p. 161102
We report on the implementation of 5 THz quantum well photodetector exploiting a patch antenna cavity array. The benefit of our plasmonic architecture on the... 
PHYSICS, APPLIED | QUANTUM WELLS | CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS | PERFORMANCE | IMPLEMENTATION | ANTENNAS | COMPARATIVE EVALUATIONS | PLASMONS | BOLOMETERS | NANOSCIENCE AND NANOTECHNOLOGY | PHOTODETECTORS | THZ RANGE | ABSORPTION | POLARIZATION
Journal Article
Optics Express, ISSN 1094-4087, 11/2012, Volume 20, Issue 23, pp. 25654 - 25661
We report the measurement of the frequency noise power spectral density of a quantum cascade laser emitting at 2.5THz. The technique is based on heterodyning... 
SEMICONDUCTOR-LASERS | PHASE-LOCKING | OPTICAL FEEDBACK | OPTICS | Optics | Physics
Journal Article
Infrared physics & technology, ISSN 1350-4495, 2018, Volume 95, pp. 148 - 151
The III-V semiconductor heterostructure-based photodetectors have been studied extensively for infrared detection, from near-infrared (NIR) to far-infrared... 
Extended wavelength photoresponse | GaAs/AlGaAs heterostructure | Infrared photodetector | INSTRUMENTS & INSTRUMENTATION | PHYSICS, APPLIED | GaAs/AIGaAs heterostructure | OPTICS | Electrical engineering | Analysis | Detectors
Journal Article
Applied physics letters, ISSN 0003-6951, 2015, Volume 107, Issue 14, pp. 141109 - 1/5
We report the full energy control over a semiconductor cavity-emitter system, consisting of single Stark-tunable quantum dots embedded in mechanically... 
PHYSICS, APPLIED | DOTS | NANOCAVITY | SPONTANEOUS EMISSION | RESONANCE | PHOTONIC CRYSTAL CAVITIES | CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS | WAVELENGTHS | PHOTONS | MEMBRANES | QUANTUM DOTS | EQUIPMENT | SOLIDS | CRYSTALS | EMISSION | TUNING | SEMICONDUCTOR MATERIALS | CONTROL
Journal Article
Journal of applied physics, ISSN 1089-7550, 2017, Volume 122, Issue 2, p. 024501
The dark current and spectral photoresponse thresholds of a semiconductor photodetector are normally determined by the minimum energy gap (Δ) of the material,... 
HOT-CARRIER PHOTODETECTION | DETECTORS | PHYSICS, APPLIED | QUANTUM WIRES | ABSORPTION | DOPED-GAAS | Dark current | Photodetectors | Research | Gallium compounds | Electric properties
Journal Article
Applied physics letters, ISSN 1077-3118, 2018, Volume 112, Issue 18, p. 181103
Tapered coplanar waveguides with integrated photoconductors were designed, fabricated, and measured, with pulsed transmission results comparing well with High... 
PHYSICS, APPLIED
Journal Article
Optics express, ISSN 1094-4087, 2015, Volume 23, Issue 3, pp. 2720 - 2729
The technique of molecular beam epitaxy has recently been used to demonstrate the growth of terahertz frequency GaAs/AlGaAs quantum cascade lasers (QCL) with... 
OPTICAL-CONSTANTS | RECENT PROGRESS | OPTICS
Journal Article
Applied physics letters, ISSN 1077-3118, 2018, Volume 113, Issue 16, p. 161105
Current noise fluctuations have been investigated in terahertz (THz) quantum well photodetectors embedded in antenna-coupled photonic architectures and... 
FREQUENCY COMBS | DETECTORS | PHYSICS, APPLIED | PHOTOCONDUCTIVE GAIN | WELL INFRARED PHOTODETECTORS | QUANTUM CASCADE LASER | TERAHERTZ | RANGE | Photonic | Engineering Sciences | Optics
Journal Article
Optics express, ISSN 1094-4087, 2018, Volume 26, Issue 4, pp. 3814 - 3827
Terahertz-frequency quantum cascade lasers (THz QCLs) based on ridge waveguides incorporating silver waveguide layers have been investigated theoretically and... 
ELECTRICAL-RESISTIVITY | FILMS | OPTICAL-CONSTANTS | METALS | MODE | COPPER | OPTICS
Journal Article