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

Petr Georgievich Eliseev

doi:10.1117/12.432566

9 July 2001 Unipolar absorption of quantum dot: theoretical estimation of the cross-section

Petr Georgievich Eliseev

Proceedings Volume 4283, Physics and Simulation of Optoelectronic Devices IX; (2001) https://doi.org/10.1117/12.432566
Event: Symposium on Integrated Optics, 2001, San Jose, CA, United States

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.

Citation Download Citation

Petr Georgievich Eliseev "Unipolar absorption of quantum dot: theoretical estimation of the cross-section", Proc. SPIE 4283, Physics and Simulation of Optoelectronic Devices IX, (9 July 2001); https://doi.org/10.1117/12.432566

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