Controlling the photon absorption characteristics in avalanche photodetectors for high resolution biomedical imaging

Cesar Bartolo-Perez; Soroush Ghandiparsi; Ahmed S. Mayet; Ahasan Ahamed; Wayesh Qarony; Hilal Cansizoglu; Yang Gao; Shih-Yuan Wang; Simon R. Cherry; M. Saif Islam; Gerard Ariño-Estrada

doi:10.1117/12.2577805

5 March 2021 Controlling the photon absorption characteristics in avalanche photodetectors for high resolution biomedical imaging

Cesar Bartolo-Perez, Soroush Ghandiparsi, Ahmed S. Mayet, Ahasan Ahamed, Wayesh Qarony, Hilal Cansizoglu, Yang Gao, Shih-Yuan Wang, Simon R. Cherry, M. Saif Islam, Gerard Ariño-Estrada

Author Affiliations +

Proceedings Volume 11658, Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XVIII; 116580B (2021) https://doi.org/10.1117/12.2577805
Event: SPIE BiOS, 2021, Online Only

Abstract

Improving the time resolution and sensitivity of Silicon-based Single Photon Avalanche Photodetectors (Si-SPAD) across the entire visible spectrum is critical to improve image quality in biomedical imaging applications such as positron emission tomography or fluorescence lifetime imaging. This work reports on the feasibility of manipulating the penetration depth of photons with 450 nm wavelengths to enhance absorption in Si-SPAD by means of photon trapping structures. Optical-electrical simulations suggest light can be directed towards critical regions of the semiconductor increasing the absorption from 54 to 90% with only 1.2μm of silicon and enhancing the probability of avalanche by electrons that leads to higher multiplication gain and speed of operation.

Conference Presentation

Citation Download Citation

Cesar Bartolo-Perez, Soroush Ghandiparsi, Ahmed S. Mayet, Ahasan Ahamed, Wayesh Qarony, Hilal Cansizoglu, Yang Gao, Shih-Yuan Wang, Simon R. Cherry, M. Saif Islam, and Gerard Ariño-Estrada "Controlling the photon absorption characteristics in avalanche photodetectors for high resolution biomedical imaging", Proc. SPIE 11658, Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XVIII, 116580B (5 March 2021); https://doi.org/10.1117/12.2577805

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