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Journals and Conferences
A coherent grating-surface-emitting diode-laser array has demonstrated dynamically stable operation in the 0 degrees phase mode. The array was operated under pulsed conditions, had a peak power output of 44 mW and a large central lobe on axis in the far field, and exhibited single-mode spectral output with better than 18-dB side-mode rejection.
Semiconductor lasers whose active region is composed of a 2D array of intersubband quantum boxes (IQBs) hold the promise  to be significantly more efficient than many-stage (i.e., 30-40) intersubband lasers, the so-called quantum-cascade lasers (QCLs). That is a direct consequence of the fact that the electron-relaxation times in deep, unipolar QBs are… (More)
It is shown that Coulomb attraction in the electron-hole plasma in CdZnSe quantum wells plays an important role in determining the observed blue-shift in lasing wavelength with increasing carrier density. The relationship between Coulomb attraction and excitonic gain is also discussed.
Measurements of the angular dependence of the efficiency of light diffraction by acoustic surface waves on crystalline quartz are presented. From these and other measurements on LiNbO(3) it is concluded that the largest diffraction efficiencies obtainable at present from acoustic surface waves are on the order of a few percent except in the special… (More)