Enhancement of the Modulation Response of Quantum-Dot-Based Down-Converted Light through Surface Plasmon Coupling

Shaobo Yang; Po-Yu Chen; Chia-Chun Ni; Jun-Chen Chen; Zong-Han Li; Yang Kuo; Chih-Chung Yang; Ta-Cheng Hsu; Chi-Ling Lee

doi:10.3390/molecules27061957

Molecules (Mar 2022)

Enhancement of the Modulation Response of Quantum-Dot-Based Down-Converted Light through Surface Plasmon Coupling

Shaobo Yang,
Po-Yu Chen,
Chia-Chun Ni,
Jun-Chen Chen,
Zong-Han Li,
Yang Kuo,
Chih-Chung Yang,
Ta-Cheng Hsu,
Chi-Ling Lee

Affiliations

Shaobo Yang: Institute of Photonics and Optoelectronics, Department of Electrical Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan
Po-Yu Chen: Institute of Photonics and Optoelectronics, Department of Electrical Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan
Chia-Chun Ni: Institute of Photonics and Optoelectronics, Department of Electrical Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan
Jun-Chen Chen: Institute of Photonics and Optoelectronics, Department of Electrical Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan
Zong-Han Li: Institute of Photonics and Optoelectronics, Department of Electrical Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan
Yang Kuo: Department of Energy and Refrigerating Air-Conditioning Engineering, Tungnan University, 152 Beishen Road, Section 3, New Taipei City 22202, Taiwan
Chih-Chung Yang: Institute of Photonics and Optoelectronics, Department of Electrical Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan
Ta-Cheng Hsu: Unikorn Semiconductor Corp., No. 5, Li-hsin 5th Rd., Hsinchu Science Park, Hsinchu 30078, Taiwan
Chi-Ling Lee: Epistar Corp., No. 5, Li-hsin 5th Rd., Hsinchu Science Park, Hsinchu 30078, Taiwan

DOI: https://doi.org/10.3390/molecules27061957
Journal volume & issue: Vol. 27, no. 6
p. 1957

Abstract

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In this paper, we first elaborate on the effects of surface plasmon (SP) coupling on the modulation responses of the emission of a light-emitting diode (LED) and its down-converted lights through colloidal quantum dots (QDs). The results of our past efforts for this subject are briefly discussed. The discussions lay the foundation for the presentation of the new experimental data of such down-converted lights in this paper. In particular, the enhancement of the modulation bandwidth (MB) of a QD-based converted light through SP coupling is demonstrated. By linking green-emitting QDs (GQDs) and/or red-emitting QDs (RQDs) with synthesized Ag nano-plates via surface modifications and placing them on a blue-emitting LED, the MBs of the converted green and red emissions are significantly increased through the induced SP coupling of the Ag nano-plates. When both GQD and RQD exist and are closely spaced in a sample, the energy transfer processes of emission-reabsorption and Förster resonance energy transfer from GQD into RQD occur, leading to the increase (decrease) in the MB of green (red) light. With SP coupling, the MB of a mixed light is significantly enhanced.

Published in Molecules

ISSN: 1420-3049 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Organic chemistry
Website: http://www.mdpi.com/journal/molecules

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