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Article

Optically-Thin Broadband Graphene-Membrane Photodetector

1
Optical Sciences Centre, Swinburne University of Technology, John St., Hawthorn, VIC 3122, Australia
2
The ARC Training Centre in Surface Engineering for Advanced Materials (SEAM), School of Science, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
3
Laser Research Center, Faculty of Physics, Vilnius University, Saulėtekio Ave. 10, LT-10223 Vilnius, Lithuania
4
Department of Electrical and Electronics Engineering, TOBB University of Economics and Technology, Ankara 06560, Turkey
5
Research Institute of Electronics, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu 432-8561, Japan
6
Dep. de Física, Universitat Politècnica de Catalunya (UPC), Colom 11, E-08222 Terrassa, Spain
7
Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys 23, E-08010 Barcelona, Spain
8
Tokyo Tech World Research Hub Initiative (WRHI), School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
*
Authors to whom correspondence should be addressed.
T.M. and D.G. contributed equally.
Nanomaterials 2020, 10(3), 407; https://doi.org/10.3390/nano10030407
Received: 20 December 2019 / Revised: 14 February 2020 / Accepted: 18 February 2020 / Published: 25 February 2020
(This article belongs to the Special Issue Smart Nano-Devices)
A broadband graphene-on-Si3N4-membrane photodetector for the visible-IR spectral range is realised by simple lithography and deposition techniques. Photo-current is produced upon illumination due to presence of the build-in potential between dissimilar metal electrodes on graphene as a result of charge transfer. The sensitivity of the photo-detector is ∼1.1 μA/W when irradiated with 515 and 1030 nm wavelengths; a smaller separation between the metal contacts favors gradient formation of the built-in electric field and increases the efficiency of charge separation. This optically-thin graphene-on-membrane photodetector and its interdigitated counterpart has the potential to be used within 3D optical elements, such as photonic crystals, sensors, and wearable electronics applications where there is a need to minimise optical losses introduced by the detector. View Full-Text
Keywords: optically thin photodetector; graphene; Si3N4 membrane; thermopower optically thin photodetector; graphene; Si3N4 membrane; thermopower
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MDPI and ACS Style

Moein, T.; Gailevičius, D.; Katkus, T.; Ng, S.H.; Lundgaard, S.; Moss, D.J.; Kurt, H.; Mizeikis, V.; Staliūnas, K.; Malinauskas, M.; Juodkazis, S. Optically-Thin Broadband Graphene-Membrane Photodetector. Nanomaterials 2020, 10, 407. https://doi.org/10.3390/nano10030407

AMA Style

Moein T, Gailevičius D, Katkus T, Ng SH, Lundgaard S, Moss DJ, Kurt H, Mizeikis V, Staliūnas K, Malinauskas M, Juodkazis S. Optically-Thin Broadband Graphene-Membrane Photodetector. Nanomaterials. 2020; 10(3):407. https://doi.org/10.3390/nano10030407

Chicago/Turabian Style

Moein, Tania, Darius Gailevičius, Tomas Katkus, Soon H. Ng, Stefan Lundgaard, David J. Moss, Hamza Kurt, Vygantas Mizeikis, Kȩstutis Staliūnas, Mangirdas Malinauskas, and Saulius Juodkazis. 2020. "Optically-Thin Broadband Graphene-Membrane Photodetector" Nanomaterials 10, no. 3: 407. https://doi.org/10.3390/nano10030407

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