Intrinsic carrier capture time in deep-etched quantum-box (70 nm diameter) lasers at low temperature: An indication of extremely high quantum capture efficiency

1997 ◽  
Vol 70 (9) ◽  
pp. 1152-1154 ◽  
Author(s):  
Jian Wang ◽  
Uwe A. Griesinger ◽  
Heinz Schweizer
Keyword(s):  
Low Temperature ◽  
Capture Efficiency ◽  
Carrier Capture ◽  
High Quantum ◽  
Capture Time

Carrier capture time and its effect on the efficiency of quantum-well lasers

1994 ◽  
Vol 30 (1) ◽  
pp. 54-62 ◽  
Author(s):  
H. Hirayama ◽  
J. Yoshida ◽  
Y. Miyake ◽  
M. Asada
Keyword(s):  
Quantum Well ◽  
Quantum Well Lasers ◽  
Carrier Capture ◽  
Capture Time

Calculation of carrier capture time of a quantum well in graded-index separate-confinement heterostructures

1986 ◽  
Vol 34 (4) ◽  
pp. 2381-2384 ◽  
Author(s):  
J. A. Brum ◽  
T. Weil ◽  
J. Nagle ◽  
B. Vinter
Keyword(s):  
Quantum Well ◽  
Carrier Capture ◽  
Graded Index ◽  
Capture Time

Carrier capture time in T-shaped semiconductor quantum wires

1998 ◽  
Vol 2 (1-4) ◽  
pp. 983-986 ◽  
Author(s):  
Gustavo A. Narvaez ◽  
Maria Carolina de O. Aguiar ◽  
José A Brum
Keyword(s):  
Quantum Wires ◽  
Carrier Capture ◽  
Capture Time

Tailoring of the carrier capture efficiency of a quantum well

1994 ◽  
Vol 37 (4-6) ◽  
pp. 1167-1170
Author(s):  
J.M. Gerard ◽  
B. Deveaud
Keyword(s):  
Quantum Well ◽  
Capture Efficiency ◽  
Carrier Capture

A Numerical Study on Separation Characteristics of Magnetic Particles in Magnetophoretic Chip Microchannels

2009 ◽  
Author(s):  
Xinyu Wu ◽  
Huiying Wu
Keyword(s):  
Dynamic Characteristics ◽  
Magnetic Particles ◽  
Numerical Study ◽  
Fluid Velocity ◽  
Capture Efficiency ◽  
Low Flow ◽  
Flow Rates ◽  
Soft Magnets ◽  
Design And Optimization ◽  
Capture Time

In this paper, a two-dimensional dynamic model describing the separation behaviors of magnetic particles in magnetophoretic chip microchannels integrated with double-side symmetric and asymmetric soft magnets is proposed and solved with the combining use of the finite element method and the fourth-order Runge-Kutta method. The dynamic characteristics of magnetic particles during the separation process, including the trajectories of magnetic particles, the capture time and capture efficiency are analyzed. The impacts of the geometrical configurations, fluid velocity and magnetic field intensity are also studied. The results show that the trajectories of the magnetic particles in microchannels are oscillatory because of the alternative magnetic force and this oscillation is more obvious for asymmetric positions of the soft magnets. The oscillatory motion of the particle leads to the increase of the moving distance and delay of the capture time. The capture time depends on the geometrical configurations, the initial positions and the dynamic characteristics of the particles. It is also found that under the same strength of magnetic fields there is nearly no difference on the capture efficiency for symmetric and asymmetric configurations. With the increase of fluid velocity, the capture efficiency drops drastically at low flow rates and decreases slowly at high flow rates. The distance between soft magnets and microchannel walls has the similar influence on capture efficiency. It is expected that the results presented in this paper are helpful for the design and optimization of magnetophoretic separation microsystems.

Estimation of carrier capture time of quantum‐well lasers by spontaneous emission spectra

1992 ◽  
Vol 61 (20) ◽  
pp. 2398-2400 ◽  
Author(s):  
Hideki Hirayama ◽  
Junji Yoshida ◽  
Yasunari Miyake ◽  
Masahiro Asada
Keyword(s):  
Quantum Well ◽  
Spontaneous Emission ◽  
Emission Spectra ◽  
Quantum Well Lasers ◽  
Carrier Capture ◽  
Capture Time
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