Optical anisotropy in type-II quantum wells on high-index substrates

Journal Article · Fri Feb 07 00:00:00 EST 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4864422· OSTI ID:22278118

Kawazu, Takuya ^[1]

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1. National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan)

Optical anisotropy in type-II quantum wells (QWs) on high-index (11n) substrates is studied theoretically. By solving 6 × 6 Luttinger-Kohn Hamiltonian, we analyze GaSb{sub x}As{sub 1-x}/In{sub x}Ga{sub 1-x}As type-II QWs and calculate the degree ρ of polarization at various compositions X. With increasing X, the preferential direction of the polarization is changed from [11-2/n] ([-110]) to [-110] ([11-2/n]) directions for n > 1 (n < 1). The optical anisotropy can be vanished even on high-index (11n) substrates by adjusting the composition X. These curious polarization properties are originated from the spatial separation of electrons and holes in the type-II QWs, where the overlap integral of their wave functions is strongly affected by the composition X.

• OSTI ID: 22278118
• Journal Information: Journal of Applied Physics, Vol. 115, Issue 5; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTROSCOPY
ANISOTROPY
CONCENTRATION RATIO
ELECTRONS
GALLIUM ANTIMONIDES
HAMILTONIANS
HETEROJUNCTIONS
HOLES
INDIUM ANTIMONIDES
POLARIZATION
QUANTUM WELLS
SUBSTRATES
WAVE FUNCTIONS
X-RAY SPECTROSCOPY