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Proceedings Paper

Unipolar absorption of quantum dot: theoretical estimation of the cross-section
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Paper Abstract

The optical cross-section is calculated for intra-band transitions in the semiconductor quantum dot (QD). Structures with QDS are promising for IR photodetectors and also for unipolar semiconductor lasers. Atom-like dot is considered in the harmonic oscillator approximation. The cross-section is derived for ground state-to-first-excited states transitions in the peak of the spectral band. It appears to be not sensitive to the wavelength of the transition, but is influenced by the bandwidth. The latter is determined by the scattering of dots in size and in composition. Whenthe bandwidth is 10 meV, the expected absorption peak is of order of > 103 cm-1 at the bulk density of dots of 1017 cm-3. A comparison is given with available data on the unipolar absorption in semiconductor QD structures.

Paper Details

Date Published: 9 July 2001
PDF: 8 pages
Proc. SPIE 4283, Physics and Simulation of Optoelectronic Devices IX, (9 July 2001); doi: 10.1117/12.432566
Show Author Affiliations
Petr Georgievich Eliseev, CHTM/Univ. of New Mexico and P.N. Lebedev Physics Institute (United States)

Published in SPIE Proceedings Vol. 4283:
Physics and Simulation of Optoelectronic Devices IX
Yasuhiko Arakawa; Peter Blood; Marek Osinski, Editor(s)

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