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Subwavelength angle-sensing photodetectors inspired by internally coupled ears in small animals
Author(s): Soongyu Yi; Ming Zhou; Zongfu Yu; Pengyu Fan; Nader Behdad; Dianmin Lin; Ken Xingze Wang; Shanhui Fan; Mark Brongersma
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Paper Abstract

Sensing the direction of sounds provides animals clear evolutionary advantage. For large animals in which the distance between the ears is larger or comparable to the audible sound wavelength, directional hearing is simply accomplished by recognizing the intensity and time differences of the wave impinging on the two ears. In small (subwavelength) animals, angle sensing seems instead to rely on coherent coupling of soundwaves from the two ears. Inspired by this natural design, here we present a subwavelength photodetection pixel that can measure both the intensity and the incident angle of light. It consists of two silicon nanowire optical resonators spaced at subwavelength distance that are electrically isolated but optically coupled. We exploit this effect to fabricate a subwavelength angle-sensitive pixels.

Paper Details

Date Published: 3 September 2019
PDF: 5 pages
Proc. SPIE 11089, Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XVI, 110890B (3 September 2019); doi: 10.1117/12.2529594
Show Author Affiliations
Soongyu Yi, Univ. of Wisconsin-Madison (United States)
Ming Zhou, Univ. of Wisconsin-Madison (United States)
Zongfu Yu, Univ. of Wisconsin-Madison (United States)
Pengyu Fan, Geballe Lab. for Advanced Materials (GLAM) (United States)
Nader Behdad, Univ. of Wisconsin-Madison (United States)
Dianmin Lin, Stanford Univ. (United States)
Ken Xingze Wang, Stanford Univ. (United States)
Shanhui Fan, Stanford Univ. (United States)
Mark Brongersma, Geballe Lab. for Advanced Materials (GLAM) (United States)


Published in SPIE Proceedings Vol. 11089:
Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XVI
Balaji Panchapakesan; André-Jean Attias, Editor(s)

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