Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Design of high-efficiency ultrabroadband dielectric gratings

Not Accessible

Your library or personal account may give you access

Abstract

We present a design concept of dielectric gratings containing resonant high (TiO2) and resonant low (SiO2) index dielectric thin-film layers between the grating and the underlying multilayer reflector. We use numerical simulations and the genetic algorithm optimization method to achieve high diffraction efficiency (>97%) in the first diffracted order over a wide wavelength range (160nm) at around 800 nm. The basic concept of the structural optimization contains a high refractive index binary grating with alternating low- and high-index reflector layers, the thicknesses of which are also among the optimization parameters. We introduce two resonant dielectric layers directly below the corrugated TiO2 grating structure and we choose a small (<10%) filling fraction for the grating. This concept allows us to broaden the spectral range where high DE can be achieved. We investigate here gratings for both Littrow-mount and off-Littrow applications.

© 2014 Optical Society of America

Full Article  |  PDF Article
More Like This
High-efficiency dielectric reflection gratings: design, fabrication, and analysis

Karl Hehl, Joerg Bischoff, Ullrich Mohaupt, Martin Palme, Bernd Schnabel, Lutz Wenke, Ragnar Bödefeld, Wolfgang Theobald, Eberhard Welsch, Roland Sauerbrey, and Hartmut Heyer
Appl. Opt. 38(30) 6257-6271 (1999)

Design and analysis of broadband high-efficiency pulse compression gratings

Jianpeng Wang, Yunxia Jin, Jianyong Ma, Tianyu Sun, and Xufeng Jing
Appl. Opt. 49(16) 2969-2978 (2010)

Optimization design of an ultrabroadband, high-efficiency, all-dielectric grating

Jianpeng Wang, Yunxia Jin, Jianda Shao, and Zhengxiu Fan
Opt. Lett. 35(2) 187-189 (2010)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


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