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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 19 — Oct. 1, 2010
  • pp: 3159–3161

Three-dimensional inverted photonic grating with engineerable refractive indices for broadband antireflection of terahertz waves

Yuting W. Chen, Pengyu Han, X.-C. Zhang, Mei-Ling Kuo, and Shawn-Yu Lin  »View Author Affiliations

Optics Letters, Vol. 35, Issue 19, pp. 3159-3161 (2010)

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Reduction of reflection is of great importance in optical spectroscopy to reduce interference and increase throughput. Here we demonstrate a three-dimensional inverted photonic grating device design using only one material—silicon. Enhanced transmission compared to planar silicon wafers is observed from 0.2 THz to over 7.3 THz for a device with a 15 µm period, which covers most of the terahertz band, and its relative 3 dB bandwidth ( δ f / f c ) is a noteworthy 116.3%. Moreover, the device is polarization independent and can perform up to a large incident angle.

© 2010 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(220.0220) Optical design and fabrication : Optical design and fabrication
(230.0230) Optical devices : Optical devices
(230.3990) Optical devices : Micro-optical devices
(320.0320) Ultrafast optics : Ultrafast optics
(320.7080) Ultrafast optics : Ultrafast devices

ToC Category:
Diffraction and Gratings

Original Manuscript: June 14, 2010
Revised Manuscript: July 28, 2010
Manuscript Accepted: August 19, 2010
Published: September 20, 2010

Yuting W. Chen, Pengyu Han, X.-C. Zhang, Mei-Ling Kuo, and Shawn-Yu Lin, "Three-dimensional inverted photonic grating with engineerable refractive indices for broadband antireflection of terahertz waves," Opt. Lett. 35, 3159-3161 (2010)

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