In modulation-doped ZnSe/(Zn,Mg)(S,Se) quantum well structures with electron concentration of about 10 11 cm --2 a new resonant optical transition involving four particles (one hole and three electrons) was found in external magnetic fields in photoluminescence excitation and reflectivity spectra. T
Hot electron cooling in parabolic and modulation doped quantum wells and doped superlattices
β Scribed by D.J. Arent; D. Szmyd; M.C. Hanna; K.M. Jones; A.J. Nozik; A.J. Springthorpe; A. Majeed
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 439 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0749-6036
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In standard electron spin resonance (ESR) spectroscopy on modulation-doped SiGe/Si/SiGe quantum wells, we observe a very sharp ESR due to the 2d electron gas and also cyclotron resonance (CR) of free carriers in the well. Both signals increase persistently after illumination and the 2d CR becomes sh
Optical and magneto-optical properties are studied for II-VI semiconductor multiple quantum wells (MQWs) doped with donors in the barriers to give electron concentrations of \(210^{10}\) to \(610^{11} \mathrm{~cm}^{-2}\) in the well layers. Following on from the recent identification of negatively c