Results 41 to 50 of about 52,939 (282)

Theoretical analysis of spectral gain in a THz quantum cascade laser: prospects for gain at 1 THz

, 2003
In a recent Letter [Appl. Phys. Lett. 82, 1015 (2003)], Williams et al. reported the development of a terahertz quantum cascade laser operating at 3.4 THz or 14.2 meV.
Lee, S. -C., Wacker, A.
core   +1 more source

Exceeding the Manley-Rowe quantum efficiency limit in an optically pumped THz amplifier [PDF]

, 2006
Using a microscopic theory based on the Maxwell-semiconductor Bloch equations, we investigate the possibility of an optically-assisted electrically-driven THz quantum cascade laser. Whereas in optical conversion schemes the power conversion efficiency is
Chow, Weng W., Waldmueller, Ines, Wanke, Michael C.   +2 more
core   +2 more sources

Plasmonic quantum cascade laser antenna [PDF]

2007 Quantum Electronics and Laser Science Conference, 2007
We demonstrate the plasmonic quantum cascade laser antenna, that can confine mid- infrared radiation beyond the diffraction limit, by integrating gold optical antennas on the laser facet.
Nanfang Yu, Ertugrul Cubukcu, Laurent Diehl, Kenneth B. Crozier, Federico Capasso   +4 more
openaire   +1 more source

Superlattice Structure of Quantum Cascade Lasers: Structural and Morphological Effects of AsH₃ Flow

Cumhuriyet Science Journal
The quantum cascade lasers (QCLs) have been widely used in mid-infrared applications due to their high power, efficiency, and design flexibility. The InP-based quantum cascade lasers, particularly those utilizing In 0.53 Ga 0.47 As/In0.52Al0.48As ...
Merve Nur Koçak, İlkay Demir
doaj   +1 more source

Design and simulation of InGaAs/AlAsSb quantum-cascade lasers for short wavelength emission [PDF]

, 2005
The design and simulation of an In-0.53Ga-0.47As/Al-0.56As-0.44Sb quantum-cascade laser emitting in the near infrared is presented. Designed using a self-consistent rate equation solver coupled with an energy balance rate equation, the proposed laser has
C. A. Evans, D. Indjin, Harrison P., P. Harrison, V. D. Jovanović, Z. Ikonić   +5 more
core   +1 more source

Robust, frequency-stable and accurate mid-IR laser spectrometer based on frequency comb metrology of quantum cascade lasers up-converted in orientation-patterned GaAs

, 2013
We demonstrate a robust and simple method for measurement, stabilization and tuning of the frequency of cw mid-infrared (MIR) lasers, in particular of quantum cascade lasers.
Ernsting, Ingo, Grisard, Arnaud, Gérard, Bruno, Hansen, Michael G., Lallier, Eric, Schiller, Stephan, Vasilyev, Sergey V.   +6 more
core   +1 more source

Deterministic Detection of Single Ion Implantation

Advanced Engineering Materials, EarlyView.
Focused ion beam implantation with high detection efficiencies will enable the rapid and scalable fabrication of advanced spin‐based technologies such as qubits. This work presents the detection efficiencies of a wide range of ions implanted into solid‐state hosts, with efficiencies of >90% recorded for ion species and substrate combinations of ...
Mason Adshead, Lok Kan Wan, Maddison Coke, Janet Jacobs, Nicholas F. L. Collins, Mark C. Rosamond, Richard J. Curry   +6 more
wiley   +1 more source

Demonstration of an All‐Optical AND Gate Mediated by Photochromic Molecules

Advanced Functional Materials, EarlyView.
A logic AND gate that runs on photons is demonstrated. It relies on two spatially separated photochromic molecules that work in tandem. Abstract The realization of a photonic logic AND gate, i.e. a logic AND gate that runs on photons rather than electrons, and where all steps are controlled by light, is demonstrated. In a proof‐of‐principle experiment,
Heyou Zhang, Max Gießübel, Pankaj Dharpure, Andrea Albert, Vira Niestierkina, Paul Mulvaney, Mukundan Thelakkat, Jürgen Köhler   +7 more
wiley   +1 more source

Engineering Multi-Section Quantum Cascade Lasers for Broadband Tuning

Photonics, 2016
In an effort to overcome current limitations to electrical tuning of quantum cascade lasers, a strategy is proposed which combines heterogeneous quantum cascade laser gain engineering with sampled grating architectures.
Steven Slivken, Manijeh Razeghi
doaj   +1 more source

Millimeter wave photonics with terahertz semiconductor lasers

Nature Communications, 2021
Photonic solutions for generating free space millimeter radiation is a fast developing field that combines optoelectronics and RF domains but has many challenges.
Valentino Pistore, Hanond Nong, Pierre-Baptiste Vigneron, Katia Garrasi, Sarah Houver, Lianhe Li, A. Giles Davies, Edmund H. Linfield, Jerome Tignon, Juliette Mangeney, Raffaele Colombelli, Miriam S. Vitiello, Sukhdeep S. Dhillon   +12 more
doaj   +1 more source