Actions for The optical constants of n- and p-doped In{sub 0.66}Ga{sub 0.34}As on InP (001) including the Burstein-Moss shift [electronic resource] : Experiment and modeling

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The optical constants of n- and p-doped In{sub 0.66}Ga{sub 0.34}As on InP (001) including the Burstein-Moss shift [electronic resource] : Experiment and modeling

Published
Washington, D.C. : United States. Dept. of Energy, 1998.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
11 pages : digital, PDF file
Additional Creators
Knolls Atomic Power Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The complex optical constants (real and imaginary components of the dielectric function and index of refraction) and absorption coefficient in the range 0.3--5.5 eV have been evaluated at 300K using spectral ellipsometry for a series of n-(5.7 × 10¹⁷ cm{sup −3} < n < 5.5 × 10¹⁹ cm{sup −3}) and p-(6.5 × 10¹⁷ cm{sup −3} < p < 5.0 × 10¹° cm{sup −3}) doped relaxed In{sub 0.66}Ga{sub 0.34}As grown by metalorganic chemical vapor deposition on InP (001). The authors have observed the fundamental absorption edge, spin-orbit split E₁-R₁, (E₁+Δ₁)-R₁ doublet and E₂ feature. The data have been fit using a comprehensive model based on the electronic energy-band structure near critical points plus relevant excitonic and band-to-band Coulomb enhancement (BBCE) effects. The intrinsic band gap of 0.612 ± 0.01 eV corresponds to an In composition of 66 ± 1%. The Burstein-Moss (BM) shift was accounted for using a Fermi level filling factor in addition to the excitonic and BBCE terms. While for the p-type samples the BM shift exhibited only parabolic effects, the n-type samples had pronounced non-parabolicity at the highest doping level, in agreement with a bandstructure calculation. By accounting for the BBCE term the authors have obtained the binding energy, R₁, of the 2D exciton associated with E₁-R₁, (E₁ + Δ₁)-R₁ features. Except for Holden et al. this quantity has not been obtained from any previous ellipsometric or other optical studies.
Report Numbers
E 1.99:kapl-p--000129
E 1.99: k--98178
E 1.99:conf-981055--
conf-981055--
k--98178
kapl-p--000129
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
10/01/1998.
"kapl-p--000129"
" k--98178"
"conf-981055--"
"DE99001732"
4. National Renewable Energy Laboratory (NREL) conference on thermophotovoltaic generation of electricity, Denver, CO (United States), 11-14 Oct 1998.
Charache, G.W.; Raynolds, J.E.; Pollak, F.H.; Holden, T.; Freeouf, J.L.
Funding Information
AC12-76SN00052
View MARC record | catkey: 14067360