FDTD simulation for light extraction in a GaN-based LED

W. J. Choi, Q Han Park, Dongho Kim, Heonsu Jeon, Cheolsoo Sone, Yongjo Park

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

It is well known that light extraction from an LED can be enhanced by roughening the surface of the LED on a wavelength scale. However, the surface structure for optimal extraction and the underlying physical mechanism for increased emission are still largely unknown. In this work, we present both numerical and experimental studies on light extraction in GaN-based LEDs with square lattice photonic crystal patterns by using large-scale, three-dimensional FDTD (finite-difference time-domain) simulations, and we establish a reasonable simulation environment, including boundary conditions, and practical simulation specs, including source conditions. We show that these numerical results agree reasonably well with the experimental results. In particular, we explain the relationship between frequency and surface structure in light extraction. This allows us to suggest optimal practical structures for enhanced LEDs.

Original languageEnglish
Pages (from-to)877-880
Number of pages4
JournalJournal of the Korean Physical Society
Volume49
Issue number3
Publication statusPublished - 2006 Sep 1

Fingerprint

light emitting diodes
simulation
environment simulation
photonics
boundary conditions
wavelengths
crystals

Keywords

  • FDTD
  • GaN-based LED
  • Photonic crystal

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Choi, W. J., Park, Q. H., Kim, D., Jeon, H., Sone, C., & Park, Y. (2006). FDTD simulation for light extraction in a GaN-based LED. Journal of the Korean Physical Society, 49(3), 877-880.

FDTD simulation for light extraction in a GaN-based LED. / Choi, W. J.; Park, Q Han; Kim, Dongho; Jeon, Heonsu; Sone, Cheolsoo; Park, Yongjo.

In: Journal of the Korean Physical Society, Vol. 49, No. 3, 01.09.2006, p. 877-880.

Research output: Contribution to journalArticle

Choi, WJ, Park, QH, Kim, D, Jeon, H, Sone, C & Park, Y 2006, 'FDTD simulation for light extraction in a GaN-based LED', Journal of the Korean Physical Society, vol. 49, no. 3, pp. 877-880.
Choi WJ, Park QH, Kim D, Jeon H, Sone C, Park Y. FDTD simulation for light extraction in a GaN-based LED. Journal of the Korean Physical Society. 2006 Sep 1;49(3):877-880.
Choi, W. J. ; Park, Q Han ; Kim, Dongho ; Jeon, Heonsu ; Sone, Cheolsoo ; Park, Yongjo. / FDTD simulation for light extraction in a GaN-based LED. In: Journal of the Korean Physical Society. 2006 ; Vol. 49, No. 3. pp. 877-880.
@article{39764d5d98264d21a269502cb9bacc39,
title = "FDTD simulation for light extraction in a GaN-based LED",
abstract = "It is well known that light extraction from an LED can be enhanced by roughening the surface of the LED on a wavelength scale. However, the surface structure for optimal extraction and the underlying physical mechanism for increased emission are still largely unknown. In this work, we present both numerical and experimental studies on light extraction in GaN-based LEDs with square lattice photonic crystal patterns by using large-scale, three-dimensional FDTD (finite-difference time-domain) simulations, and we establish a reasonable simulation environment, including boundary conditions, and practical simulation specs, including source conditions. We show that these numerical results agree reasonably well with the experimental results. In particular, we explain the relationship between frequency and surface structure in light extraction. This allows us to suggest optimal practical structures for enhanced LEDs.",
keywords = "FDTD, GaN-based LED, Photonic crystal",
author = "Choi, {W. J.} and Park, {Q Han} and Dongho Kim and Heonsu Jeon and Cheolsoo Sone and Yongjo Park",
year = "2006",
month = "9",
day = "1",
language = "English",
volume = "49",
pages = "877--880",
journal = "Journal of the Korean Physical Society",
issn = "0374-4884",
publisher = "Korean Physical Society",
number = "3",

}

TY - JOUR

T1 - FDTD simulation for light extraction in a GaN-based LED

AU - Choi, W. J.

AU - Park, Q Han

AU - Kim, Dongho

AU - Jeon, Heonsu

AU - Sone, Cheolsoo

AU - Park, Yongjo

PY - 2006/9/1

Y1 - 2006/9/1

N2 - It is well known that light extraction from an LED can be enhanced by roughening the surface of the LED on a wavelength scale. However, the surface structure for optimal extraction and the underlying physical mechanism for increased emission are still largely unknown. In this work, we present both numerical and experimental studies on light extraction in GaN-based LEDs with square lattice photonic crystal patterns by using large-scale, three-dimensional FDTD (finite-difference time-domain) simulations, and we establish a reasonable simulation environment, including boundary conditions, and practical simulation specs, including source conditions. We show that these numerical results agree reasonably well with the experimental results. In particular, we explain the relationship between frequency and surface structure in light extraction. This allows us to suggest optimal practical structures for enhanced LEDs.

AB - It is well known that light extraction from an LED can be enhanced by roughening the surface of the LED on a wavelength scale. However, the surface structure for optimal extraction and the underlying physical mechanism for increased emission are still largely unknown. In this work, we present both numerical and experimental studies on light extraction in GaN-based LEDs with square lattice photonic crystal patterns by using large-scale, three-dimensional FDTD (finite-difference time-domain) simulations, and we establish a reasonable simulation environment, including boundary conditions, and practical simulation specs, including source conditions. We show that these numerical results agree reasonably well with the experimental results. In particular, we explain the relationship between frequency and surface structure in light extraction. This allows us to suggest optimal practical structures for enhanced LEDs.

KW - FDTD

KW - GaN-based LED

KW - Photonic crystal

UR - http://www.scopus.com/inward/record.url?scp=33749829643&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33749829643&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:33749829643

VL - 49

SP - 877

EP - 880

JO - Journal of the Korean Physical Society

JF - Journal of the Korean Physical Society

SN - 0374-4884

IS - 3

ER -