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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 7 — Mar. 26, 2012
  • pp: 7575–7579

Broadband and omnidirectional light harvesting enhancement of fluorescent SiC

Yiyu Ou, Valdas Jokubavicius, Philip Hens, Michl Kaiser, Peter Wellmann, Rositza Yakimova, Mikael Syväjärvi, and Haiyan Ou  »View Author Affiliations


Optics Express, Vol. 20, Issue 7, pp. 7575-7579 (2012)
http://dx.doi.org/10.1364/OE.20.007575


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Abstract

In the present work, antireflective sub-wavelength structures have been fabricated on fluorescent 6H-SiC to enhance the white light extraction efficiency by using the reactive-ion etching method. Broadband and omnidirectional antireflection characteristics show that 6H-SiC with antireflective sub-wavelength structures suppress the average surface reflection significantly from 20.5 % to 1.01 % over a wide spectral range of 390-784 nm. The luminescence intensity of the fluorescent 6H-SiC could be enhanced in the whole emission angle range. It maintains an enhancement larger than 91 % up to the incident angle of 70 degrees, while the largest enhancement of 115.4 % could be obtained at 16 degrees. The antireflective sub-wavelength structures on fluorescent 6H-SiC could also preserve the luminescence spectral profile at a large emission angle by eliminating the Fabry-Pérot microcavity interference effect.

© 2012 OSA

OCIS Codes
(250.5230) Optoelectronics : Photoluminescence
(220.4241) Optical design and fabrication : Nanostructure fabrication
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:
Thin Films

History
Original Manuscript: January 24, 2012
Revised Manuscript: March 2, 2012
Manuscript Accepted: March 14, 2012
Published: March 19, 2012

Citation
Yiyu Ou, Valdas Jokubavicius, Philip Hens, Michl Kaiser, Peter Wellmann, Rositza Yakimova, Mikael Syväjärvi, and Haiyan Ou, "Broadband and omnidirectional light harvesting enhancement of fluorescent SiC," Opt. Express 20, 7575-7579 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-7-7575


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