High-quality infrared imaging with graphene photodetectors at room temperature.

Graphene, a two-dimensional material, is expected to enable broad-spectrum and high-speed photodetection because of its gapless band structure, ultrafast carrier dynamics and high mobility. We demonstrate a multispectral active infrared imaging by using a graphene photodetector based on hybrid response mechanisms at room temperature. The high-quality images with optical resolutions of 418 nm, 657 nm and 877 nm and close-to-theoretical-limit Michelson contrasts of 0.997, 0.994, and 0.996 have been acquired for 565 nm, 1550 nm, and 1815 nm light imaging measurements by using an unbiased graphene photodetector, respectively. Importantly, by carefully analyzing the results of Raman mapping and numerical simulations for the response process, the formation of hybrid photocurrents in graphene detectors is attributed to the synergistic action of photovoltaic and photo-thermoelectric effects. The initial application to infrared imaging will help promote the development of high performance graphene-based infrared multispectral detectors.

[1]  A. Rinzler,et al.  Computational study of graphene-based vertical field effect transistor , 2013 .

[2]  T. Otsuji,et al.  Source and Drain Structures for Suppressing Ambipolar Characteristics of Graphene Field-Effect Transistors , 2009 .

[3]  M. Burghard,et al.  Gate dependent photocurrents at a graphene p-n junction , 2010 .

[4]  Y. Guo,et al.  Layer‐Controlled and Wafer‐Scale Synthesis of Uniform and High‐Quality Graphene Films on a Polycrystalline Nickel Catalyst , 2012 .

[5]  Wenchao Chen,et al.  18.5% efficient graphene/GaAs van der Waals heterostructure solar cell , 2015 .

[6]  T. Ren,et al.  Large-area, transparent, and flexible infrared photodetector fabricated using P-N junctions formed by N-doping chemical vapor deposition grown graphene. , 2014, Nano letters.

[7]  V. Fal’ko,et al.  Electrons in bilayer graphene. , 2007 .

[8]  A. M. van der Zande,et al.  Photo-thermoelectric effect at a graphene interface junction. , 2009, Nano letters.

[9]  G. Konstantatos,et al.  Hybrid graphene-quantum dot phototransistors with ultrahigh gain. , 2011, Nature nanotechnology.

[10]  Kenneth L. Shepard,et al.  Chip-integrated ultrafast graphene photodetector with high responsivity , 2013, Nature Photonics.

[11]  A. Rogalski.  Infrared detectors: status and trends , 2003 .

[12]  X. Duan,et al.  Highly efficient gate-tunable photocurrent generation in vertical heterostructures of layered materials. , 2013, Nature nanotechnology.

[13]  Xiang Zhang,et al.  A graphene-based broadband optical modulator , 2011, Nature.

[14]  Nathan Youngblood,et al.  Waveguide-integrated black phosphorus photodetector with high responsivity and low dark current , 2014, Nature Photonics.

[15]  F. Xia,et al.  Graphene photodetectors for high-speed optical communications , 2010, 1009.4465.

[16]  Chang-Hua Liu,et al.  Graphene photodetectors with ultra-broadband and high responsivity at room temperature. , 2014, Nature nanotechnology.

[17]  Xinran Wang,et al.  Distinct photoresponse in graphene induced by laser irradiation , 2015 .

[18]  Phaedon Avouris,et al.  Black phosphorus photodetector for multispectral, high-resolution imaging. , 2014, Nano letters.

[19]  Picosecond photoresponse in van der Waals heterostructures. , 2015, Nature nanotechnology.

[20]  Andrew G. Glen,et al.  APPL , 2001 .

[21]  Michael G. Spencer,et al.  Measurement of Ultrafast Carrier Dynamics in Epitaxial Graphene , 2008 .

[22]  F. Xia,et al.  Photoconductivity of biased graphene , 2012, Nature Photonics.

[23]  Daoben Zhu,et al.  Chemical doping of graphene , 2011 .

[24]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[25]  Yihong Wu,et al.  Hysteresis of electronic transport in graphene transistors. , 2010, ACS nano.

[26]  P. Kim,et al.  Thermoelectric and magnetothermoelectric transport measurements of graphene. , 2008, Physical review letters.

[27]  Andre K. Geim,et al.  Raman spectrum of graphene and graphene layers. , 2006, Physical review letters.

[28]  T. Fromherz,et al.  CMOS-compatible graphene photodetector covering all optical communication bands , 2013, 1302.3854.

[29]  K. Novoselov,et al.  Photothermoelectric and photoelectric contributions to light detection in metal-graphene-metal photodetectors. , 2014, Nano letters.

[30]  Hongkun Park,et al.  Gate-activated photoresponse in a graphene p-n junction. , 2010, Nano letters.

[31]  K. Shepard,et al.  Boron nitride substrates for high-quality graphene electronics. , 2010, Nature nanotechnology.

[32]  F. Xia,et al.  Role of contacts in graphene transistors: A scanning photocurrent study , 2009 .

[33]  Jarek Antoszewski,et al.  Progress, challenges, and opportunities for HgCdTe infrared materials and detectors , 2015 .

[34]  Jiwoong Park,et al.  Imaging of photocurrent generation and collection in single-layer graphene. , 2009, Nano letters.

[35]  Thomas H. Bointon,et al.  All-Graphene Photodetectors , 2013, ACS nano.

[36]  P. Kim,et al.  Electric field effect tuning of electron-phonon coupling in graphene. , 2006, Physical review letters.

[37]  F. Guinea,et al.  The electronic properties of graphene , 2007, Reviews of Modern Physics.

[38]  D. Veksler,et al.  Measurement of the optical absorption spectra of epitaxial graphene from terahertz to visible , 2008, 0801.3302.

[39]  A. Rogalski.  Recent progress in infrared detector technologies , 2011 .

[40]  Yi Shi,et al.  Planar carbon nanotube–graphene hybrid films for high-performance broadband photodetectors , 2015, Nature Communications.

[41]  Charles M Marcus,et al.  Hot carrier transport and photocurrent response in graphene. , 2011, Nano letters.

[42]  N. Mott,et al.  Observation of Anderson Localization in an Electron Gas , 1969 .

[43]  Albert A. Michelson,et al.  Studies in Optics , 1995 .

[44]  Viet Giang Truong,et al.  The role of charge traps in inducing hysteresis: Capacitance–voltage measurements on top gated bilayer graphene , 2011 .

[45]  Ying Ying Wang,et al.  Raman spectroscopy and imaging of graphene , 2008, 0810.2836.

[46]  Takashi Taniguchi,et al.  Hot Carrier–Assisted Intrinsic Photoresponse in Graphene , 2011, Science.