Results 31 to 40 of about 3,452 (196)

Absolute frequency referencing for swept dual-comb spectroscopy with midinfrared quantum cascade lasers

Physical Review Research, 2023
Quantum cascade laser (QCL) frequency combs have revolutionized midinfrared (MIR) spectroscopy by their high brightness and fast temporal resolution, and are a promising technology for fully integrated and cost-effective sensors.
K. N. Komagata, V. J. Wittwer, T. Südmeyer, L. Emmenegger, M. Gianella   +4 more
doaj   +1 more source

Transient analysis of solar pyrolysis and hydrogen yield via interband cascade laser absorption spectroscopy of methane, acetylene, ethylene, and ethane

Applications in Energy and Combustion Science, 2023
A mid-infrared laser absorption sensing method has been developed to measure species concentrations of four hydrocarbons and gas temperature over a range of temperatures in mixture compositions relevant to the pyrolytic decomposition of natural gas.
Barathan Jeevaretanam, Mostafa Abuseada, Chuyu Wei, Nicolas Q. Minesi, Timothy S. Fisher, R. Mitchell Spearrin   +5 more
doaj   +1 more source

Fabrication methods for a quantum cascade photonic crystal surface emitting laser [PDF]

, 2003
Conventional quantum cascade (QC) lasers are intrinsically edge-emitting devices with mode confinement achieved via a standard mesa stripe configuration.
Capasso, F., Cho, A. Y., Colombelli, R., Gmachl, C., Painter, O., Sergent, A. M., Sivco, D. L., Srinivasan, K., Tennant, D. M., Troccoli, M.   +9 more
core   +1 more source

Self-consistent analysis of carrier-transport and carrier-capture dynamics in quantum cascade intersubband semiconductor lasers [PDF]

, 2000
A methodology for the self-consistent analysis of carrier transport and carrier capture aspects of the dynamics of quantum cascade intersubband semiconductor lasers is described in this paper. The approach is used to analyze two prototype quantum cascade
Cheung, C.Y.L., Kalna, K., Pierce, I., Shore, K.A.   +3 more
core   +1 more source

Gain and Losses and Room-Temperature Operation in Interband Cascade Lasers

IEEE Photonics Journal, 2012
Interband cascade laser structures with a different number of cascades and doping types and levels in the separate confinement and in the hole-injection regions were grown.
Geunmin Ryu, Athanasios N. Chryssis, Jeyran Amirloo, Simarjeet Saini, Fred J. Towner, Mario Dagenais   +5 more
doaj   +1 more source

Optical sideband generation up to room temperature with mid-infrared quantum cascade lasers [PDF]

, 2015
Room temperature sideband generation on an optical carrier is demonstrated using midinfrared quantum cascade lasers. This is achieved via an enhancement of the nonlinear susceptibility via resonant interband and intersubband excitations, compensating the
Amanti, M, Cavalié, P, Davies, AG, Dhillon, SS, Houver, S, Lebreton, A, Li, L, Linfield, EH, Pereira, TAS, Renaudat Saint Jean, M, Sirtori, C, Tignon, J   +11 more
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Electrical scanning probe microscopy of electronic and photonic devices: connecting internal mechanisms with external measures

Nanotechnology Reviews, 2016
The inner workings of semiconductor electronic and photonic devices, such as dopants, free charge carriers, electric potential, and electric field, are playing a crucial role in the function and performance of the devices.
Ban Dayan, Wen Boyu, Dhar Rudra Sankar, Razavipour Seyed Ghasem, Xu Chao, Wang Xueren, Wasilewski Zbig, Dixon-Warren Sinjin   +7 more
doaj   +1 more source

Optical gain calculation and structure optimization of type-II GaAsSb/InAs/InGaAs quantum well heterostructures

AIP Advances, 2023
This paper reports an optimization scheme of type-II GaAsSb/InAs/InGaAs quantum wells using the six bands k · p method. By calculating the optical gain, the optimal structures of the quantum wells are obtained. We observed that without an electric field,
Xin-Zhuo Zhou, Chao-Chao Du, Gang Bi
doaj   +1 more source

Detection of Ethanol Using a Tunable Interband Cascade Laser at 3.345 μm

Photonic Sensors, 2018
With the progress of the laser manufacturing technology, trace gas sensors based on tunable interband cascade lasers (ICLs) and quantum cascade lasers (QCLs) have been widely used to detect organic compounds with high sensitivity.
Hui Gao, Liang Xie, Ping Gong, Hui Wang
doaj   +1 more source

Optical Wireless Link Operated at the Wavelength of 4.0 µm with Commercially Available Interband Cascade Laser

Sensors, 2021
This paper evaluates the key factors influencing the design of optical wireless communication (OWC) systems operating in the mid-infrared range. The performed analysis has shown that working in this spectral “window”, compared to other wavelengths, is ...
Janusz Mikołajczyk, Robert Weih, Marcin Motyka   +2 more
doaj   +1 more source