Field-induced Stark effects in Ag-coated CdS quantum dots

Koo-Chul Je; Sang Youp Yim; Jaehoon Lee; Eun-Hee Jeang; Seung-Han Park

doi:10.1117/12.601480

4 April 2005 Field-induced Stark effects in Ag-coated CdS quantum dots

Koo-Chul Je, Sang Youp Yim, Jaehoon Lee, Eun-Hee Jeang, Seung-Han Park

Proceedings Volume 5734, Quantum Dots, Nanoparticles, and Nanoclusters II; (2005) https://doi.org/10.1117/12.601480
Event: Integrated Optoelectronic Devices 2005, 2005, San Jose, California, United States

Abstract

Field-induced Stark effects in Ag-coated CdS quantum dot structures are presented. We observe clear exciton peaks due to the quantum confinement effect and the surface plasmon effect in Ag-coated CdS quantum dot fabricated by gamma ray irradiation method. In addition, we observed also a dominant red-shift of the CdS exciton absorption peak as the Wannier Stark effect, implying the strong local field effect in the metal-coated semiconductor composite quantum dot system. The Stark shift of the exciton peak is investigated as a function of the local field for different silver thickness and various sizes of quantum dots based on the effective-mass Hamiltonian using the numerical-matrix-diagonalization method.

Citation Download Citation

Koo-Chul Je, Sang Youp Yim, Jaehoon Lee, Eun-Hee Jeang, and Seung-Han Park "Field-induced Stark effects in Ag-coated CdS quantum dots", Proc. SPIE 5734, Quantum Dots, Nanoparticles, and Nanoclusters II, (4 April 2005); https://doi.org/10.1117/12.601480

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