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Energy Express

Energy Express

  • Editor: Bernard Kippelen
  • Vol. 19, Iss. S4 — Jul. 4, 2011
  • pp: A914–A929

Surface plasmon coupling with radiating dipole for enhancing the emission efficiency of a light-emitting diode

Yang Kuo, Shao-Ying Ting, Che-Hao Liao, Jeng-Jie Huang, Chih-Yen Chen, Chieh Hsieh, Yen-Cheng Lu, Cheng-Yen Chen, Kun-Ching Shen, Chih-Feng Lu, Dong-Ming Yeh, Jyh-Yang Wang, Wen-Hung Chuang, Yean-Woei Kiang, and C. C. Yang  »View Author Affiliations


Optics Express, Vol. 19, Issue S4, pp. A914-A929 (2011)
http://dx.doi.org/10.1364/OE.19.00A914


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Abstract

The experimental demonstrations of light-emitting diode (LED) fabrication with surface plasmon (SP) coupling with the radiating dipoles in its quantum wells are first reviewed. The SP coupling with a radiating dipole can create an alternative emission channel through SP radiation for enhancing the effective internal quantum efficiency when the intrinsic non-radiative recombination rate is high, reducing the external quantum efficiency droop effect at high current injection levels, and producing partially polarized LED output by inducing polarization-sensitive SP for coupling. Then, we report the theoretical and numerical study results of SP-dipole coupling based on a simple coupling model between a radiating dipole and the SP induced on a nearby Ag nanoparticle (NP). To include the dipole strength variation effect caused by the field distribution built in the coupling system (the feedback effect), the radiating dipole is represented by a saturable two-level system. The spectral and dipole-NP distance dependencies of dipole strength variation and total radiated power enhancement of the coupling system are demonstrated and interpreted. The results show that the dipole-SP coupling can enhance the total radiated power. The enhancement is particularly effective when the feedback effect is included and hence the dipole strength is increased.

© 2011 OSA

OCIS Codes
(230.3670) Optical devices : Light-emitting diodes
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Light-Emitting Diodes

History
Original Manuscript: March 16, 2011
Manuscript Accepted: June 15, 2011
Published: July 1, 2011

Virtual Issues
Optics in LEDS for Lighting (2011) Optics Express

Citation
Yang Kuo, Shao-Ying Ting, Che-Hao Liao, Jeng-Jie Huang, Chih-Yen Chen, Chieh Hsieh, Yen-Cheng Lu, Cheng-Yen Chen, Kun-Ching Shen, Chih-Feng Lu, Dong-Ming Yeh, Jyh-Yang Wang, Wen-Hung Chuang, Yean-Woei Kiang, and C. C. Yang, "Surface plasmon coupling with radiating dipole for enhancing the emission efficiency of a light-emitting diode," Opt. Express 19, A914-A929 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-S4-A914


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