Results 91 to 100 of about 36,081 (260)
Suppressed Auger Heating of Hot Carriers in Cu‐Doped Colloidal Quantum Wells
Advanced Science, EarlyView.ABSTRACT Auger heating represents a major bottleneck for hot carrier (HC) relaxation in colloidal quantum wells (CQWs), delaying carrier accumulation in band‐edge states and diminishing performance in light‐emitting applications. To address this issue, we introduce copper doping in CdSe CQWs to create midgap states, which efficiently suppresses Auger ...
Junhong Yu +6 more
wiley +1 more source
PhotonicsA high-power narrow-linewidth fiber laser with single-mode beam quality is experimentally demonstrated. By employing a cascaded phase modulation strategy, the stimulated Brillouin scattering (SBS) threshold of the laser is effectively increased from 973 ...
Yang Liu +12 more
doaj +1 more source
Monolithic narrow-linewidth InGaAsP semiconductor laser for coherent optical communications [PDF]
A design for a monolithic narrow-linewidth InGaAsP diode laser has been developed using a multiple-quantum-well (MQW) extended-passive-cavity distributed-Bragg-reflector (DBR) laser design.
Enstrom, R. E. +2 more
core +1 more source
Why the laser linewidth is so narrow: A modern perspective
, 2015 We review and interpret a modern approach to laser theory, steady-state ab initio laser theory (SALT), which treats lasing and amplification in a unified manner as a non-unitary scattering problem described by a non-linear scattering matrix.
Cerjan, Alexander, Stone, A. Douglas
core +1 more source
Advanced Electronic Materials, EarlyView.III‐nitride semiconductors have revolutionized optoelectronics, enabling transformative technologies such as high‐efficiency LEDs and lasers. However, their use in intersubband optoelectronics has remained limited. This work marks an important step forward by demonstrating highly coherent inter‐well resonant tunneling injection in III‐nitride ...
Jimy Encomendero +6 more
wiley +1 more source
Integrated Electro‐Optically Tunable Narrow‐Linewidth III–V Laser
Advanced Photonics ResearchHerein, an integrated electro‐optically tunable narrow‐linewidth III–V laser with an output power of 738.8 μW and an intrinsic linewidth of 45.55 kHz at the C band is demonstrated.
Yiran Zhu +10 more
doaj +1 more source
Advanced Electronic Materials, EarlyView.ABSTRACT Layered 2D materials are considered as promising for memristive applications due to their ultimate vertical scalability compared to conventional semiconductor films and pronounced hysteresis properties. Bias‐resolved Raman and Photoluminescence mapping is used to quantify strain from phonon shifts and carrier density from the exciton‐trion ...
Vladislav Kurtash +4 more
wiley +1 more source
A 20 W, Less-Than-1-kHz Linewidth Linearly Polarized All-Fiber Laser
Applied Sciences, 2018 We report a continuous-wave high-output power and narrow-linewidth all-fiber laser at 1550 nm with the master oscillator power amplifier (MOPA) configuration. An all-fiber distributed feedback seed laser was boosted by three cascaded fiber amplifiers. In
Mingyuan Xue +6 more
doaj +1 more source
Airborne water vapor DIAL system and measurements of water and aerosol profiles [PDF]
The Lidar Applications Group at NASA Langley Research Center has developed a differential absorption lidar (DIAL) system for the remote measurement of atmospheric water vapor (H2O) and aerosols from an aircraft.
Browell, Edward V., Higdon, Noah S.
core +1 more source
Three-dimensional laser cooling at the Doppler limit
, 2014 Many predictions of Doppler cooling theory of two-level atoms have never been verified in a three-dimensional geometry, including the celebrated minimum achievable temperature $\hbar \Gamma/2 k_B$, where $\Gamma$ is the transition linewidth.
Aspect, Alain +8 more
core +4 more sources