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Research Paper

Applied Science and Convergence Technology 2023; 32(2): 38-40

Published online March 30, 2023


Copyright © The Korean Vacuum Society.

Investigation of Resonant Local Surface Plasmon Effects Using CdSe Quantum Dots

Heedae Kim* and Keun Heo

Semiconductor Physics Research Center, School of Semiconductor Science and Technology, Jeonbuk National University, Jeonju 54896, Republic of Korea

Correspondence to:hdkim1@jbnu.ac.kr

Received: February 8, 2023; Revised: February 22, 2023; Accepted: February 22, 2023

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License(http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.


The local surface plasmon effects of colloidal cadmium selenide (CdSe) quantum dots (QDs) were observed at a low temperature (approximately 5 K). As the wavelength between the CdSe QDs and metals is precisely tuned, the enhancement effects of CdSe photoluminescence (PL) significantly increase because of the increased coupling effects between the plasmonic fields of the metal surfaces of Au and Ag and the exciton states of a single CdSe QD. The PL enhancement effect of Au was observed to be approximately six times higher than that of Ag because of enhanced coupling. This result demonstrates the importance of wavelength matching in maximizing the surface plasmon effects and achieving enhanced PL in various device applications.

Keywords: Colloidal cadmium selenide quantum dots, Gold layers, Photoluminescence enhancement, Local surface plasmon effects

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