Please use this identifier to cite or link to this item: https://doi.org/10.1063/1.1448890
Title: Application of analytical k.p model with envelope function approximation to intersubband transitions in n-type III-V semiconductor Γ quantum wells
Authors: Cheah, C.W.
Tan, L.S. 
Karunasiri, G.
Issue Date: 15-Apr-2002
Citation: Cheah, C.W., Tan, L.S., Karunasiri, G. (2002-04-15). Application of analytical k.p model with envelope function approximation to intersubband transitions in n-type III-V semiconductor Γ quantum wells. Journal of Applied Physics 91 (8) : 5105-5115. ScholarBank@NUS Repository. https://doi.org/10.1063/1.1448890
Abstract: A 14-band k.p model combined with an envelope function approximation has been developed for the analysis of III-V semiconductor quantum wells by including the six Γ 7, Γ 8 conduction bands nonperturbatively. With appropriate approximations, the envelope functions associated with the Γ 7, Γ 8 bands can be expressed in terms of the two Γ 6 conduction band envelope functions, which are the most important components in the electron wave function of an n-type direct-gap III-V compound semiconductor quantum well of zincblende structure. The Schrödinger-type equations for the Γ 6 conduction band envelope functions are derived, together with the energy-dependent effective mass that includes the effect of band nonparabolicity, as well as the eigenenergy-dependent effective potential for the envelope wave functions. The Schrödinger-type equations and the boundary conditions for the conservation of probability flux in the 14-band k.p model are found to be different from those of the conventional effective mass model. The 14-band model is then applied to the study of intersubband transitions due to transverse magnetic (TM) and transverse electric (TE) mode infrared radiation in n-type Γ quantum wells, and the calculated absorption spectra are compared with those computed using an equivalent 8-band k.p model. It is found that the TM absorption spectra calculated using the two models are very similar, but the TE absorption spectra calculated using the 14-band model is up to 6 times higher than that calculated using the 8-band model. A design of the quantum well structure for enhancing TE absorption is also discussed. © 2002 American Institute of Physics.
Source Title: Journal of Applied Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/81981
ISSN: 00218979
DOI: 10.1063/1.1448890
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

18
checked on Nov 11, 2018

WEB OF SCIENCETM
Citations

16
checked on Oct 23, 2018

Page view(s)

77
checked on Nov 9, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.