Enhanced optical characteristics of light emitting diodes by surface plasmon of Ag nanostructures

Lee-Woon Jang; Jin-Woo Ju; Ju-Won Jeon; Dae-Woo Jeon; Jung-Hun Choi; Seung-Jae Lee; Seong-Ran Jeon; Jong-Hyeob Baek; E. Sari; H. V. Demir; Hyung-Do Yoon; Sung-Min Hwang; In-Hwan Lee

doi:10.1117/12.869465

24 January 2011 Enhanced optical characteristics of light emitting diodes by surface plasmon of Ag nanostructures

Lee-Woon Jang, Jin-Woo Ju, Ju-Won Jeon, Dae-Woo Jeon, Jung-Hun Choi, Seung-Jae Lee, Seong-Ran Jeon, Jong-Hyeob Baek, E. Sari, H. V. Demir, Hyung-Do Yoon, Sung-Min Hwang, In-Hwan Lee

Author Affiliations +

Proceedings Volume 7945, Quantum Sensing and Nanophotonic Devices VIII; 794511 (2011) https://doi.org/10.1117/12.869465
Event: SPIE OPTO, 2011, San Francisco, California, United States

Abstract

We investigated the surface plasmon coupling behavior in InGaN/GaN multiple quantum wells at 460 nm by employing Ag nanostructures on the top of a roughened p-type GaN. After the growth of a blue light emitting diode structure, the p-GaN layer was roughened by inductive coupled plasma etching and the Ag nanostructures were formed on it. This structure showed a drastic enhancement in photoluminescence and electroluminescence intensity and the degree of enhancement was found to depend on the morphology of Ag nanostructures. From the time-resolved photoluminescence measurement a faster decay rate for the Ag-coated structure was observed. The calculated Purcell enhancement factor indicated that the improved luminescence intensity was attributed to the energy transfer from electron-hole pair recombination in the quantum well to electron vibrations of surface plasmon at the Ag-coated surface of the roughened p-GaN.

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Lee-Woon Jang, Jin-Woo Ju, Ju-Won Jeon, Dae-Woo Jeon, Jung-Hun Choi, Seung-Jae Lee, Seong-Ran Jeon, Jong-Hyeob Baek, E. Sari, H. V. Demir, Hyung-Do Yoon, Sung-Min Hwang, and In-Hwan Lee "Enhanced optical characteristics of light emitting diodes by surface plasmon of Ag nanostructures", Proc. SPIE 7945, Quantum Sensing and Nanophotonic Devices VIII, 794511 (24 January 2011); https://doi.org/10.1117/12.869465

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