Photocurrent enhancement by utilizing unidirectional excitation of surface plasmons

Mehdi Afshari Bavil; Zhi Liu; Wuwen Zhou; Chuanbo Li; Buwen Cheng

doi:10.1117/12.2246135

3 November 2016 Photocurrent enhancement by utilizing unidirectional excitation of surface plasmons

Mehdi Afshari Bavil, Zhi Liu, Wuwen Zhou, Chuanbo Li, Buwen Cheng

Proceedings Volume 10028, Plasmonics II; 100280I (2016) https://doi.org/10.1117/12.2246135
Event: SPIE/COS Photonics Asia, 2016, Beijing, China

Abstract

A circular slit-groove surface plasmon polaritons (SPPs) launcher surrounding a photodetector is employed theoretically to enhance the photocurrent of a typical Si-Ge photodetectors operating at telecommunication frequency regime. The slit and grooves are designed such that the SPPs are focused at the center of the absorption layer of the photodetector to result in additional electric current. Phase difference approach is applied to lead constructive interference between the incident light impinging from the top and the SPPs propagating toward the photodetector. Simulation result proves the interference and periodic behavior is observed. Finally the period of the groove, slit-groove distance, and slitphotodetector distance is determined via simulation. Furthermore it was shown that photocurrent increases by approximately 13-fold when the SPPs are introduced.

Citation Download Citation

Mehdi Afshari Bavil, Zhi Liu, Wuwen Zhou, Chuanbo Li, and Buwen Cheng "Photocurrent enhancement by utilizing unidirectional excitation of surface plasmons", Proc. SPIE 10028, Plasmonics II, 100280I (3 November 2016); https://doi.org/10.1117/12.2246135

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