Current Optics and Photonics

Optical Society of Korea (한국광학회)
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Numerical Analysis of Light Extraction Efficiency of a Core-shell Nanorod Light-emitting Diode

  • Kangseok Kim (Department of Photonics and Nanoelectronics, Hanyang University) ;
  • Gijun Ju (Department of Photonics and Nanoelectronics, Hanyang University) ;
  • Younghyun Kim (Department of Photonics and Nanoelectronics, Hanyang University)
  • Received : 2023.04.24
  • Accepted : 2023.07.14
  • Published : 2023.10.25
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Abstract

We present a detailed analysis of the light extraction efficiency (LEE) of a core-shell nanorod light emitting diode (LED) using finite-difference time-domain (FDTD) simulations. We found that the LEE has a deep dependence on source positions and polarization directions based on the calculated LEE results for every x and z position inside the core-shell nanorod structure. The LEEs are different for the upper part (pyramid) and the lower part (sidewall) of the core-shell nanorod owing to total internal reflection (TIR) and the generated optical modes in the structure. As a result, the LEE of sidewall is much larger than that of pyramid. The averaged LEE of the core-shell nanorod LED is also investigated with variable p-GaN thickness, n-GaN thickness, and height for the design guidelines for the optimized LEE of core-shell nanorod LEDs.

Keywords

Acknowledgement

Korea Basic Science Institute (National Research Facilities and Equipment Center) grant funded by the Ministry of Education (grant No. 2023R1A6C103A035, No. 2021R1A6C101A405); Technology Innovation Program (20015909) through the Korea Evaluation Institute of Industrial Technology (KEIT), funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea); National Research Foundation of Korea (NRF) funded by the Korea government (MSIT) (No. 2021R1G1A1091912, No. 2022K1A3A1A79090726); Korea Institute for Advancement of Technology (KIAT) grant funded by the Korea Government (MOTIE) (P0023718, HRD Program for Industrial Innovation).

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