Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • CLEO/Europe and EQEC 2011 Conference Digest
  • OSA Technical Digest (CD) (Optica Publishing Group, 2011),
  • paper CK_P7

GaAs based mid infrared filter with resonant gratings

Not Accessible

Your library or personal account may give you access

Abstract

Many applications -like spectroscopy- require spectral filtering, commonly achieved using Fabry-Pérot stacks. These can be designed to fulfill varying requirements (central wavelength, bandwidth and rejection). However, practical fabrication of the stack imposes some limitations. Indeed, reducing the bandwidth requires an increasing number of layers and ultra-narrowband filters are hard to fabricate. Similarly, extending to long wavelengths necessitates thicker layers that are not easily grown or deposited. Ultra-narrow-band filters in the mid-infrared are thus particularly difficult to obtain using this approach. In that particular aspect, resonant grating filters are an extremely interesting alternative. Especially for narrow band free-space filtering in the MIR region, as required for gas sensing (CH4, CO,…). A resonant grating filter is a sub-wavelength periodically structured planar waveguide that reflects and transmits light specularly, with the same reflection and transmission coefficient than that of the unstructured waveguide, except at resonance, where the structure exhibit one pole (100% reflection) and one zero (0% reflection)[1]. These are due to the diffraction grating that couple the incident beam, for a given wavelength and incident angle, and thus excite a mode in the structure (Figure 1 left). By reciprocity, this grating will also uncouple the mode to emit light.

© 2011 Optical Society of America

PDF Article
More Like This
Mid-Infrared (~4.65μm) Cavity Resonator Integrated Grating Filters

Sylvain Augé, Sergei Gluchko, Sylvain Pelloquin, Anne-Laure Fehrembach, Thomas Antoni, Antoine Monmayrant, Evgeni Popov, and Olivier Gauthier-Lafaye
CK_11_1 The European Conference on Lasers and Electro-Optics (CLEO/Europe) 2017

Optimized GaAs High Contrast Grating Design and Fabrication for Mid-infrared Application at 2.3 µm

C. Chevallier, N. Fressengeas, F. Genty, J. Jacquet, Y. Laaroussi, G. Almuneau, D. Sanchez, L. Cerutti, and T. Taliercio
FWS5 Frontiers in Optics (FiO) 2011

Grating-Based Mid-Infrared Long-Pass Filter for High-Power Applications

Wolfgang Schweinberger, Daniel Gerz, Thomas Butler, Thomas Siefke, Martin Heusinger, Tatiana Amotchkina, Vladimir Pervak, Uwe Zeitner, and Ioachim Pupeza
JW2A.69 CLEO: Applications and Technology (CLEO:A&T) 2019

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved