Abstract
We propose a novel method for the design of binary two-level diffractive optical elements that provide an efficient diffractive function while reducing the reflectivity of a high-index interface. The structure can be fabricated with a single patterning step and is particularly useful for the mid-infrared spectral range. The concept is based on zero-order transmission gratings using subwavelength microstructures. To demonstrate the concept a Dammann grating has been realized in silicon and characterized in the mid-infrared by scanning the far-field intensity distribution.
© 2017 Optical Society of America
Full Article | PDF ArticleMore Like This
Giang-Nam Nguyen, Kevin Heggarty, Julien Le Meur, Andreas Bacher, and Patrick Meyrueis
Opt. Lett. 42(24) 5178-5181 (2017)
Zhen Peng, David A. Fattal, Andrei Faraon, Marco Fiorentino, Jingjing Li, and Raymond G. Beausoleil
Opt. Lett. 36(8) 1515-1517 (2011)
Zile Li, Guoxing Zheng, Ping’An He, Song Li, Qiling Deng, Jiangnan Zhao, and Yong Ai
Opt. Lett. 40(18) 4285-4288 (2015)