Ex) Article Title, Author, Keywords
New Physics: Sae Mulli 2014; 64: 231-240
Published online March 31, 2014 https://doi.org/10.3938/NPSM.64.231
Copyright © New Physics: Sae Mulli.
Soon Hyun KWON1, Suck Whan KIM*1, Sang Chil LEE2, Hyung Soo AHN3
1 Department of Physics, Andong National University, Andong 760-749, Korea
2 Faculty of Science Education, Jeju National University, Jeju 690-756, Korea
3 Department of Applied Physics, Korea Maritime University, Busan 606-791, Korea
This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
A finite type-I semiconductor superlattice with different dielectric media on either side of the surface is considerd on the basis of a simple model of a parabolic confining potential well and a half-parabolic confining potential well. Using the random-phase approximation, the density-density correlation function, including intrasubband and intersubband level transitions, is obtained in a multiple quantum well for the parabolic confining potential well and for the half-parabolic confining potential well, respectively. The dispersion relations for the surface and the bulk states are obtained as functions of the momentum wave vector for the two cases. The Raman intensities due to the bulk and the surface for the parabolic confining potential well and for the half-parabolic confining potential well are also obtained for incoming light energy as functions of the momentum wave vector.
Keywords: Multiple quantum well, Type-I superlattice, Random phase approximation, Density-density correlation function