Infrared laser based on intersubband transitions in quantum wells
โ Scribed by Rui Q. Yang
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 290 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0749-6036
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๐ SIMILAR VOLUMES
Shake-up transitions involving QW hole subbands have been observed as satellites in selective photoluminescence spectra of undoped \(\mathrm{GaAs} / \mathrm{AlGaAs}\) QWs. These shake-up transitions are explained in terms of an interaction between localized exciton and valenceband hole states attach
We report experimental evidence of Second-harmonic generation (SHG) due to intersubband transitions in \(G a A s / A l_{x} G a_{1-x} A 8\) step quantum wells using a multipass or "waveguide" structure. A SHG conversion efficiency of \(3.46 \times 10^{-4}\) has been achieved which is one order of mag
Because of the absence of polar optical phonon scattering, the lifetime difference of the upper and lower lasing levels, to which population inversion and laser gain are proportional, is an order of magnitude larger in silicon-based structures than in the III-Vs. Further enhancements are due to phon