Abstract

A highly efficient reflective Dammann grating with a triangular structure operating at 1064 nm wavelength under normal incidence for TE polarization is designed and fabricated. Rigorous coupled wave analysis and particle swarm optimization algorithms are adopted to design and analyze the properties. The triangular reflective grating could cancel the 0th order, and the mechanism is clarified by the simplified modal method. The gratings are fabricated by direct laser writing lithography. The diffraction efficiency of fabricated grating is more than 86% at 1064 nm wavelength (97.6% in theory). This reflective grating should be a useful optical element in the field of high-power lasers as well as other reflective applications.

© 2016 Optical Society of America

Design of highly efficient transmission gratings with deep etched triangular grooves

Xufeng Jing, Junchao Zhang, Shangzhong Jin, Pei Liang, and Ying Tian
Appl. Opt. 51(33) 7920-7933 (2012)

Structured light spots projected by a Dammann grating with high power efficiency and uniformity for optical sorting

Xiaodong Sun, Yuyang Sun, Jing Bu, Siwei Zhu, and X.-C. Yuan
Appl. Opt. 49(28) 5437-5443 (2010)

Simplified analysis of sub-wavelength triangular gratings by simplified modal method

Gayathri Sridharan and Shanti Bhattacharya
Appl. Opt. 55(34) 9712-9718 (2016)

Unified design of sinusoidal-groove fused-silica grating

Jijun Feng, Changhe Zhou, Hongchao Cao, and Peng Lu
Appl. Opt. 49(30) 5697-5704 (2010)

Design of a high-efficiency seven-port beam splitter using a dual duty cycle grating structure

Fung Jacky Wen and Po Sheun Chung
Appl. Opt. 50(19) 3187-3190 (2011)