Infrared absorptance of wavelength-selection trapezoid grating

Jyh Rou Sze; An Chi Wei; Fong Zhi Chen

doi:10.1117/12.893365

9 September 2011 Infrared absorptance of wavelength-selection trapezoid grating

Jyh Rou Sze, An Chi Wei, Fong Zhi Chen

Proceedings Volume 8093, Metamaterials: Fundamentals and Applications IV; 80932A (2011) https://doi.org/10.1117/12.893365
Event: SPIE NanoScience + Engineering, 2011, San Diego, California, United States

Abstract

The wavelength-selection trapezoid gratings which can improve the infrared absorptance contrast are demonstrated. The spectral absorptance of silicon trapezoid grating is studied by using the rigorous coupled-wave analysis (RCWA) numerical scheme. The optical performance of the trapezoid gratings with different side-wall slopes on the groove ridge is calculated and analyzed. According to the analyzed results, the side-wall slope of the trapezoid grating plays an important role for enhancing the contrast of the infrared absorptance. It is found that the absorptance peak is located at the wavelength of 7.0 μm, which is equal to the period of the trapezoid grating. The maximum spectral absorptance contrast is given at the proper side-wall slope of groove ridge of the trapezoid gratings. The influences of the oblique incident light are also analyzed. When the incident angle increases, the absorptance peak deviates from the original location of the normal incident condition. The absorptance peak not only decreases its magnitude but also be split.

Citation Download Citation

Jyh Rou Sze, An Chi Wei, and Fong Zhi Chen "Infrared absorptance of wavelength-selection trapezoid grating", Proc. SPIE 8093, Metamaterials: Fundamentals and Applications IV, 80932A (9 September 2011); https://doi.org/10.1117/12.893365

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available