Laser power dependence of the band edge of CdSxSe1-x quantum dots

Prabhat Verma; Gert Irmer; Masayoshi Yamada

doi:10.1117/12.382801

17 April 2000 Laser power dependence of the band edge of CdSxSe1-x quantum dots

Prabhat Verma, Gert Irmer, Masayoshi Yamada

Proceedings Volume 3937, Micro- and Nano-photonic Materials and Devices; (2000) https://doi.org/10.1117/12.382801
Event: Symposium on Integrated Optoelectronics, 2000, San Jose, CA, United States

Abstract

We present a systematic study of the influence of probing laser power-density on the band-edge of CdS_xSe_1-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.

Citation Download Citation

Prabhat Verma, Gert Irmer, and Masayoshi Yamada "Laser power dependence of the band edge of CdSxSe1-x quantum dots", Proc. SPIE 3937, Micro- and Nano-photonic Materials and Devices, (17 April 2000); https://doi.org/10.1117/12.382801

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