TAILIEUCHUNG - Optically detected electron-phonon resonances in hyperbolic Poschl-Teller quantum wells

In this paper, the author investigate the linear optically detected electrophonon resonance (ODEPR) effect and linewidths in the hyperbolic quantum well with Poschl-eller potential type. | OPTICALLY DETECTED ELECTRON - PHONON RESONANCES ¨ IN HYPERBOLIC POSCHL-TELLER QUANTUM WELLS LE DINH 1 TRAN THI NGOC PHAM TUAN VINH 2 1 Hue University of Education, University of Hue 2 Dong Thap University ANH1 , Abstract: The explicit expressions for linearly optical conductivity and absorption power of electromagnetic wave caused by confined electrons in the hyperbolic quantum well is obtained in the case of electron-longitudinal optical phonon scattering. Linearly optically detected electrophonon resonance (ODEPR) effect in a specific GaAs/AlAs hyperbolic quantum well with P¨oschl-Teller potential type is investigated. Conditions for ODEPR are discussed based on the curves expressing the dependence of absorption power on the photon energy. From these curves we obtained ODEPR - linewidths as profiles of the curves. Computational results show that linear ODEPR- linewidths increase with temperature and decrease with well parameters. Keywords: absorption power, quantum well, hyperbolic, P¨oschl Teller potential, ODEPR- linewidths 1 INTRODUCTION In recent years, electron-phonon resonance effect (EPR) and optically detected electron-phonon resonance (ODEPR) is being interested by domestic and international physicists. These studies have contribution in clarifying new properties of electrons under the effect of external fields, therefore provide information of optical properties of semiconductors to the technology of fabricating optoelectronic components. EPR phenomena arise from an electron scattering due to the absorption and emission of phonons when the energy difference of two electric subbands equals the longitudinal-optical (LO) phonon energy. If these processes are accompanied by the absorption or emission of photons, we will have the ODEPR effect. The EPR effect has been started to study since 1972 by Bryskin and Firsov for the nondegenerate Journal of Sciences and Education, Hue Universitys College of Education ISSN 1859-1612, No 01(45)/2018: pp. .

• Vật lý
• Electrophonon resonance effect
• Optically detected electrophonon resonance
• EPR phenomena arise
• Electron phonon resonance effect
• Hyperbolic quantum well
• Poschl Teller potential
• Poschl teller hyperbolic potential
• Low dimensional semiconductor physics
• Quantum well structures
• Optically detected magnetophonon resonance
• Nonsquare QW structure
• The nature of the optically detected MPR effect