Enhanced photodetection in graphene-integrated photonic crystal cavity

被引：73

作者：

Shiue, Ren-Jye ^{[1
]}

Gan, Xuetao ^{[2
]}

Gao, Yuanda ^{[3
]}

Li, Luozhou ^{[2
]}

Yao, Xinwen ^{[2
]}

Szep, Attila ^{[4
]}

Walker, Dennis, Jr. ^{[4
]}

Hone, James ^{[3
]}

Englund, Dirk ^{[1
]}

机构：

[1] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA

[2] Columbia Univ, Dept Elect Engn, New York, NY 10027 USA

[3] Columbia Univ, Dept Mech Engn, New York, NY 10027 USA

[4] Sensors Directorate, Air Force Res Lab, Dayton, OH 45433 USA

来源：

APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 24期

关键词：

LIGHT-MATTER INTERACTION; OPTICAL MODULATOR; LAYER GRAPHENE; NANOCAVITY; OPTOELECTRONICS; TRANSISTOR; PLASMONS;

D O I：

10.1063/1.4839235

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate the controlled enhancement of photoresponsivity in a graphene photodetector by coupling to slow light modes in a long photonic crystal linear defect cavity. Near the Brillouin zone (BZ) boundary, spectral coupling of multiple cavity modes results in broad-band photocurrent enhancement from 1530 nm to 1540 nm. Away from the BZ boundary, individual cavity resonances enhance the photocurrent eight-fold in narrow resonant peaks. Optimization of the photocurrent via critical coupling of the incident field with the graphene-cavity system is discussed. The enhanced photocurrent demonstrates the feasibility of a wavelength-scale graphene photodetector for efficient photodetection with high spectral selectivity and broadband response. (C) 2013 AIP Publishing LLC.

引用

页数：4

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