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Proceedings Paper

Laser power dependence of the band edge of CdSxSe1-x quantum dots
Author(s): Prabhat Verma; Gert Irmer; Masayoshi Yamada
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Paper Abstract

We present a systematic study of the influence of probing laser power-density on the band-edge of CdSxSe1-x nanoparticles embedded in a glass matrix. Both the position and the strength of the band-edge luminescence are found to be very sensitive to the laser power. It is observed that the band-edge luminescence shifts initially towards low energy and then towards high energy with increasing laser power. The result are analyzed in terms of laser induced local heating and band-filling mechanism, both of which are found to be very effective processes for nanoparticle systems. Laser induced local heating of the nanoparticles are determined by analyzing temperature- dependent Raman spectra from the sample.

Paper Details

Date Published: 17 April 2000
PDF: 9 pages
Proc. SPIE 3937, Micro- and Nano-photonic Materials and Devices, (17 April 2000); doi: 10.1117/12.382801
Show Author Affiliations
Prabhat Verma, Kyoto Institute of Technology (Japan)
Gert Irmer, Technische Univ. Bergakademic Frieberg (Germany)
Masayoshi Yamada, Kyoto Institute of Technology (Japan)


Published in SPIE Proceedings Vol. 3937:
Micro- and Nano-photonic Materials and Devices
Joseph W. Perry; Axel Scherer, Editor(s)

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