Subwavelength angle-sensing photodetectors inspired by internally coupled ears in small animals

Soongyu Yi; Ming Zhou; Zongfu Yu; Pengyu Fan; Nader Behdad; Dianmin Lin; Ken Xingze Wang; Shanhui Fan; Mark Brongersma

doi:10.1117/12.2529594

3 September 2019 Subwavelength angle-sensing photodetectors inspired by internally coupled ears in small animals

Soongyu Yi, Ming Zhou, Zongfu Yu, Pengyu Fan, Nader Behdad, Dianmin Lin, Ken Xingze Wang, Shanhui Fan, Mark Brongersma

Author Affiliations +

Proceedings Volume 11089, Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XVI; 110890B (2019) https://doi.org/10.1117/12.2529594
Event: SPIE Nanoscience + Engineering, 2019, San Diego, California, United States

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.

Conference Presentation

Citation Download Citation

Soongyu Yi, Ming Zhou, Zongfu Yu, Pengyu Fan, Nader Behdad, Dianmin Lin, Ken Xingze Wang, Shanhui Fan, and Mark Brongersma "Subwavelength angle-sensing photodetectors inspired by internally coupled ears in small animals", Proc. SPIE 11089, Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XVI, 110890B (3 September 2019); https://doi.org/10.1117/12.2529594

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