Intrinsic Response Time of Graphene Photodetectors

被引：258

作者：

Urich, Alexander ^{[1
]}

Unterrainer, Karl ^{[1
]}

Mueller, Thomas ^{[1
]}

机构：

[1] Vienna Univ Technol, Inst Photon, A-1040 Vienna, Austria

来源：

NANO LETTERS | 2011年 / 11卷 / 07期

基金：

奥地利科学基金会;

关键词：

Graphene; photodetectors; nonlinear photoresponse; carrier dynamics; ULTRAFAST; FILMS;

D O I：

10.1021/nl2011388

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Graphene-based photodetectors are promising new devices for high-speed optoelectronic applications. However, despite recent efforts it is not clear what determines the ultimate speed limit of these devices. Here, we present measurements of the intrinsic response time of metal-graphene-metal photodetectors with monolayer graphene using an optical correlation technique with ultrashort laser pulses. We obtain a response time of 2.1 ps that is mainly given by the short lifetime of the photogenerated carriers. This time translates into a bandwidth of similar to 262 GHz. Moreover, we investigate the dependence of the response time on gate voltage and illumination laser power.

引用

页码：2804 / 2808

页数：5

共 37 条

[1]

Bae S, 2010, NAT NANOTECHNOL, V5, P574, DOI [10.1038/nnano.2010.132, 10.1038/NNANO.2010.132]

[2] Graphene-based liquid crystal device [J].

Blake, Peter ;

Brimicombe, Paul D. ;

Nair, Rahul R. ;

Booth, Tim J. ;

Jiang, Da ;

Schedin, Fred ;

Ponomarenko, Leonid A. ;

Morozov, Sergey V. ;

Gleeson, Helen F. ;

Hill, Ernie W. ;

Geim, Andre K. ;

Novoselov, Kostya S. .

NANO LETTERS, 2008, 8 (06) :1704-1708

[3]

Bonaccorso F, 2010, NAT PHOTONICS, V4, P611, DOI [10.1038/nphoton.2010.186, 10.1038/NPHOTON.2010.186]

[4] Ultrafast Carrier Dynamics in Graphite [J].

Breusing, Markus ;

Ropers, Claus ;

Elsaesser, Thomas .

PHYSICAL REVIEW LETTERS, 2009, 102 (08)

[5] PICOSECOND OPTICAL MIXING IN FAST PHOTODETECTORS [J].

CARRUTHERS, TF ;

WELLER, JF .

APPLIED PHYSICS LETTERS, 1986, 48 (07) :460-462

[6] The electronic properties of graphene [J].

Castro Neto, A. H. ;

Guinea, F. ;

Peres, N. M. R. ;

Novoselov, K. S. ;

Geim, A. K. .

REVIEWS OF MODERN PHYSICS, 2009, 81 (01) :109-162

[7] Broadband electromagnetic response and ultrafast dynamics of few-layer epitaxial graphene [J].

Choi, H. ;

Borondics, F. ;

Siegel, D. A. ;

Zhou, S. Y. ;

Martin, M. C. ;

Lanzara, A. ;

Kaindl, R. A. .

APPLIED PHYSICS LETTERS, 2009, 94 (17)

[8] FABRICATION OF SUB-50 NM FINGER SPACING AND WIDTH HIGH-SPEED METAL-SEMICONDUCTOR-METAL PHOTODETECTORS USING HIGH-RESOLUTION ELECTRON-BEAM LITHOGRAPHY AND MOLECULAR-BEAM EPITAXY [J].

CHOU, SY ;

LIU, Y ;

FISCHER, PB .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 1991, 9 (06) :2920-2924

[9] Measurement of ultrafast carrier dynamics in epitaxial graphene [J].

Dawlaty, Jahan M. ;

Shivaraman, Shriram ;

Chandrashekhar, Mvs ;

Rana, Farhan ;

Spencer, Michael G. .

APPLIED PHYSICS LETTERS, 2008, 92 (04)

[10]

Diels J.C., 2014, Ultrashort Laser Pulse Phenomena

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