Now showing items 61-70 of 169
Fabrication of thick silicon dioxide layers for thermal isolation
(IOP Publishing Ltd, 2004-06-01)
This paper reports a method of fabricating very thick (10–100 µm) silicon dioxide layers for thermal isolation without the need for very long deposition or oxidation. Deep reactive ion etching (DRIE) is used to create ...
Smart sensors
(IOP Publishing Ltd, 1991-06-01)
This paper is a state-of-the-art review of solid-state integrated and smart sensors. Smart sensors are defined as sensors that provide analog signal processing of signals recorded by sensors, digital representation of the ...
Raman scattering by plasmons in fibonacci superlattices
(Elsevier, 1992-10)
We report on resonant Raman scattering by plasmons in a modulation-doped Fibonacci superlattice consisting of 270-A-thick GaAs wells separated by Al0.3Ga0.7As barriers whose thickness is either 800 A or 430 A. The ordering ...
Role of strain on threshold current, modal purity and Auger processes in strained quantum well lasers
(Elsevier, 1990)
We present numerical calculations of material gain and threshold current density in compressively strained quantum well lasers grown on GaAs and InP. The valence bandstructure is obtained from a 4 x 4 k [middle dot] p ...
High-resolution nonlinear laser spectroscopy of exciton relaxation in GaAs quantum wells
(Springer-Verlag, 1991-12)
This paper describes measurements of exciton relaxation in GaAs/AlGaAs quantum well structures based on high resolution nonlinear laser spectroscopy. The nonlinear optical measurements show that low energy excitons can be ...
Blind deconvolution of sources from the transmission responses of one-dimensional inhomogeneous continuous and discrete layered absorbing media
(IOP Publishing Ltd, 1997-08-01)
Non-destructive testing and reconstruction of lossy non-uniform transmission lines require solving inverse scattering problems for inhomogeneous one-dimensional (1D) lossy media. Often the source waveform used to probe the ...
COMMENT: Glass-like dielectric behaviour of K2CrO4
(IOP Publishing Ltd, 1988-12-30)
It is shown that results on K2CrO4 reported in 1987 by Dissado and Haidar do not invalidate the earlier proposal by Russell and Merlin (1986) of the existence of a high-temperature dipole-glass phase.
Modulation of twin-emitter semiconductor lasers beyond the frequency of relaxation oscillations
(Elsevier, 1991-04-15)
Self-modulation above the relaxation oscillation frequency has been previously observed in a phased-array semiconductor lasers. Rate equations for a twin-emitter phased-array semiconductor laser are used to show that active ...
Electronic raman scattering in quantum wells: Coupled levels in tilted magnetic fields
(Elsevier, 1987)
We report on a magneto-Raman scattering investigation of free and donor-bound electrons in GaAs---AlxGa1-xAs quantum wells. For fields perpendicular to the layers, the spectra show intersubband transitions of photoexcited ...
Mean and variance of single photon counting with deadtime
(IOP Publishing Ltd, 2000-07-01)
The statistics of photon counting by systems affected by deadtime are potentially important for statistical image reconstruction methods. We present a new way of analysing the moments of the counting process for a counter ...