Results 11 to 20 of about 242,280 (338)

Effect of Post Thermal Annealing on the Optical Properties of InP/ZnS Quantum Dot Films

open access: yesNanoscale Research Letters, 2018
The enhancement of optical properties via thermal annealing on InP/ZnS core/shell quantum dot (QD) film was investigated in this work. The increase of emission intensities of the QD films was observed after thermal annealing at 180 °C for 5 min.
Bowen Zhang   +8 more
doaj   +1 more source

Twisted-light-induced intersubband transitions in quantum wells at normal incidence [PDF]

open access: yes, 2013
We examine theoretically the intersubband transitions induced by laser beams of light with orbital angular momentum (twisted light) in semiconductor quantum wells at normal incidence. These transitions become possible in the absence of gratings thanks to
Quinteiro, G. F.   +2 more
core   +2 more sources

Research of selective etching in LiNbO3 using proton-exchanged wet etching technique

open access: yesMaterials Research Express, 2020
Lithium niobate material (LN) has shown great application potentials in the fabrication of integrated optical devices due to its excellent physical properties, especially with the occurrence of lithium niobate-on-insulator (LNOI) substrate.
Ying Li   +6 more
doaj   +1 more source

Dispersion-induced dynamics of coupled modes in a semiconductor laser with saturable absorption [PDF]

open access: yes, 2014
We present an experimental and theoretical study of modal nonlinear dynamics in a specially designed dual-mode semiconductor Fabry-Perot laser with a saturable absorber.
O'Brien, Stephen   +2 more
core   +2 more sources

Semiconductor-based Geometrical Quantum Gates [PDF]

open access: yes, 2002
We propose an implementation scheme for holonomic, i.e., geometrical, quantum information processing based on semiconductor nanostructures. Our quantum hardware consists of coupled semiconductor macroatoms addressed/controlled by ultrafast multicolor ...
A. Recati   +26 more
core   +2 more sources

Hot Carrier Photocurrent through MOS Structure

open access: yesApplied Sciences, 2021
Flow of photocurrent through the metal-oxide-semiconductor structure induced by the pulsed infrared CO2 laser is investigated experimentally. In the case of a perfect insulator, the photocurrent has a photocapacitive character.
Jonas Gradauskas, Steponas Ašmontas
doaj   +1 more source

Intensity noise reduction in semiconductor lasers by amplitude-phase decorrelation [PDF]

open access: yes, 1990
Detuned operation of a laser results in coupling of field amplitude and phase fluctuations. In a semiconductor laser, this coupling is known to be very large.
Newkirk, Michael A., Vahala, Kerry J.
core   +1 more source

Effect of carrier confinement on effective mass of excitons and estimation of ultralow disorder in Al x Ga1−x As/GaAs quantum wells by magneto-photoluminescence

open access: yesScientific Reports, 2017
Effect of charge carrier confinement and ultra-low disorder acquainted in AlGaAs/GaAs multi-quantum well system is investigated via Magneto-photoluminescence spectroscopy.
S. Haldar   +6 more
doaj   +1 more source

Improved Optical Property and Lasing of ZnO Nanowires by Ar Plasma Treatment

open access: yesNanoscale Research Letters, 2019
ZnO nanowires play a very important role in optoelectronic devices due to the wide bandgap and high exciton binding energy. However, for one-dimensional nanowire, due to the large surface to volume ratio, surface traps and surface adsorbed species acts ...
Haolin Li   +8 more
doaj   +1 more source

The use of semiconductor laser diodes at low temperatures [PDF]

open access: yesVestnik MGTU, 2016
The theoretical analysis and experimental research of possibility of using commercially available semiconductor laser diodes at low temperatures (down to the temperature of 50 K) has been performed in the paper.
Vlasova S. V.   +2 more
doaj   +1 more source

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