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Optical Engineering

Beam-selector dependent on incident angle by guided-mode resonant subwavelength grating
Author(s): Ya Nie; Lei Wang; Zhiheng Wang; Chengjun Lai
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Paper Abstract

Guided-mode resonances in subwavelength gratings are strongly dependent on incident angles. A beam selector with high sensitivity is designed based on this property. A guided-mode resonant silicon nitride (Si3N4) grating on a silicon dioxide (SiO2) substrate is presented as an example of such a device with a 1.55 μm wavelength. The calculated reflection resonance has an incident angle FWHM of Δθ~0.0042 radians, and a normal-incident peak efficiency of ~99.9%. In addition, we propose that this type of beam selector be applied to select transverse modes of semiconductor lasers.

Paper Details

Date Published: 1 November 2002
PDF: 4 pages
Opt. Eng. 41(11) doi: 10.1117/1.1511531
Published in: Optical Engineering Volume 41, Issue 11
Show Author Affiliations
Ya Nie, Sichuan Univ. (China)
Lei Wang, Sichuan Univ. (China)
Zhiheng Wang, Sichuan Univ. (China)
Chengjun Lai, Sichuan Univ. (China)


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