Results 51 to 60 of about 263,472 (374)
Gain in quantum cascade lasers and superlattices: A quantum transport theory
, 2002 Gain in current-driven semiconductor heterostructure devices is calculated within the theory of nonequilibrium Green functions. In order to treat the nonequilibrium distribution self-consistently the full two-time structure of the theory is employed ...
A. Wacker +25 more
core +1 more source
A liénard oscillator resonant tunnelling diode-laser diode hybrid integrated circuit: model and experiment [PDF]
, 2008 We report on a hybrid optoelectronic integrated circuit based on a resonant tunnelling diode driving an optical communications laser diode. This circuit can act as a voltage controlled oscillator with optical and electrical outputs.
Figueiredo, J.M.L. +5 more
core +1 more source
Temperature Compensation Algorithm of Air Quality Monitoring Equipment Based on TDLAS
Mathematics, 2023 When tunable diode laser absorption spectroscopy is used to measure the concentration of gas, the second harmonic signal of demodulation is changed due to the influence of temperature change, and the error in concentration measurement is great.
Yue Wang, Xiaoli Wang
doaj +1 more source
Stability Boundaries in Laterally-Coupled Pairs of Semiconductor Lasers
Photonics, 2019 The dynamic behaviour of coupled pairs of semiconductor lasers is studied using normal-mode theory, applied to one-dimensional (slab) and two-dimensional (circular cylindrical) real index confined structures.
Martin Vaughan +4 more
doaj +1 more source
Modal analysis of semiconductor lasers with nonplanar mirrors [PDF]
, 1986 We present a formalism for analyzing laser resonators which possess nonplanar mirrors and lateral waveguiding [e.g., an unstable resonator semiconductor laser (URSL)].
Lang, Robert J. +2 more
core +1 more source
Advanced Engineering Materials, EarlyView.This study explores aerosol jet‐printed (AJP) surface roughness, its effects on the performance of microwave electronics, and its process contributors. First, an electromagnetic model is vetted for AJP's unique roughness signature. Simulations are built which show process‐induced roughness is as significant as conductor resistivity in driving microwave
Christopher Areias, Alkim Akyurtlu
wiley +1 more source
Фізика і хімія твердого тіла, 2019 For the analysis of the measurement of thermoelectric parameters of semiconductors, the Harman pulsed method was used. The authors propose a new approach to determine the thermoelectric quality factor of thin semiconductor films in the temperature ...
Y. V. Tur, Y. V. Pavlovskyi, I. S. Virt
doaj +1 more source
Reliable Tissue Grasping in Robotic Minimally Invasive Surgery Enabled by Optical‐Based Slip Sensing
Advanced Engineering Materials, EarlyView.An optical‐based slip sensing method using a complementary metal–oxide–semiconductor image sensor with a built‐in infrared light emitting diode enables real‐time detection of tissue slippage—including displacement, direction, and speed—in robotic minimally invasive surgery.
Minjae Lee, Amy Kyungwon Han
wiley +1 more source
Fundamentals and applications of spatial dissipative solitons in photonic devices : [Chapter 6] [PDF]
, 2009 We review the properties of optical spatial dissipative solitons (SDS). These are stable, self‐localized optical excitations sitting on a uniform, or quasi‐uniform, background in a dissipative environment like a nonlinear optical cavity.
Ackemann, Thorsten +2 more
core +1 more source
Advanced Functional Materials, EarlyView.PBTTT‐OR‐R, a C14‐alkoxy/alkyl‐PBTTT polymer derivative, is of substantial interest for optoelectronics due to its specific fullerene intercalation behavior and enhanced charge‐transfer absorption. Comparing this polymer with (S) and without (O) homocoupling defects reveals that PBTTT‐OR‐R(O) forms stable co‐crystals with PC61BM, while PBTTT‐OR‐R(S ...
Zhen Liu +14 more
wiley +1 more source