Plasmonics toward high-efficiency LEDs from the visible to the deep-UV region

K. Okamoto, M. Funato, Y. Kawakami, N. Okada, K. Tadatomo, K. Tamada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The surface plasmon (SP) resonance was used to increase the emission efficiencies toward high efficiency light-emitting diodes (LEDs). We obtained the enhancements of the electroluminescence from the fabricated plasmonic LED device structure by employing the very thin p+-GaN layer. The further enhancements should be achievable by optimization of the metal and device structures. Next important challenge is to extend this method from the visible to the deep UV region. By using Aluminum, we obtained the enhancements of emissions at ∼260 nm from AlGaN/AlN quantum wells. We succeeded to control the SP resonance by using the various metal nanostructures. These localized SP resonance spectra in the deep-UV regions presented here would be useful to enhance deep UV emissions of super wide bandgap materials such as AlGaN/AlN. We believe that our approaches based on ultra-deep UV plasmonics would bring high efficiency ultra-deep UV light sources.

Original languageEnglish
Title of host publicationLight-Emitting Diodes
Subtitle of host publicationMaterials, Devices, and Applications for Solid State Lighting XXI
EditorsMichael R. Krames, Jong Kyu Kim, Li-Wei Tu, Martin Strassburg
PublisherSPIE
ISBN (Electronic)9781510606890
DOIs
Publication statusPublished - Jan 1 2017
EventLight-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XXI 2017 - San Francisco, United States
Duration: Jan 30 2017Feb 1 2017

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10124
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherLight-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XXI 2017
CountryUnited States
CitySan Francisco
Period1/30/172/1/17

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Okamoto, K., Funato, M., Kawakami, Y., Okada, N., Tadatomo, K., & Tamada, K. (2017). Plasmonics toward high-efficiency LEDs from the visible to the deep-UV region. In M. R. Krames, J. K. Kim, L-W. Tu, & M. Strassburg (Eds.), Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XXI [101240R] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10124). SPIE. https://doi.org/10.1117/12.2249589