Amplified Spontaneous Emission from InP/ZnS Colloidal Quantum Dots

Changseop Kim; Kyung-Sang Cho; Yeonsang Park

doi:10.5757/ASCT.2023.32.1.23

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Research Paper

Applied Science and Convergence Technology 2023; 32(1): 23-25

Published online January 30, 2023

https://doi.org/10.5757/ASCT.2023.32.1.23

Amplified Spontaneous Emission from InP/ZnS Colloidal Quantum Dots

Changseop Kim^{a , b} , Kyung-Sang Cho^c , and Yeonsang Park^{a , b , ∗}

^aDepartment of Physics, Chungnam National University, Daejeon 34134, Republic of Korea
^bInstitute of Quantum Systems, Chungnam National University, Daejeon 34134, Republic of Korea
^cSamsung Advanced Institute of Technology, Suwon 16678, Republic of Korea

Correspondence to:yeonsang.park@cnu.ac.kr

Received: November 7, 2022; Revised: December 14, 2022; Accepted: January 2, 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.

Abstract

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Abstract

Indium phosphide (InP) colloidal quantum dots (CQDs) have received attention because of their lower toxicity than that of cadmium-based CQDs. Quantum dot light emitting diodes (QLEDs) have been studied and developed rapidly by many research groups because QLED displays are one of the most important applications of InP CQDs. On the other hand, lasing from InP-based quantum dots has many issues that need to be resolved for real applications. Using nanosecond optical pumping pulses, we observe amplified spontaneous emission from an InP CQD thin film with 450 nm thickness deposited on glass grating structure.

Keywords: Indium phosphide, Colloidal quantum dots, Amplified spontaneous emission, Distributed feedback