| Title |
Optically-thin broadband graphene-membrane photodetector |
| Authors |
Tania, Moein ; Gailevičius, Darius ; Katkus, Tomas ; Ng, Soon Hock ; Lundgaard, Stefan ; Moss, David J ; Kurt, Hamza ; Mizeikis, Vygantas ; Staliūnas, Kęstutis ; Malinauskas, Mangirdas ; Juodkazis, Saulius |
| DOI |
10.3390/nano10030407 |
| Full Text |
|
| Is Part of |
Nanomaterials.. Basel : MDPI AG. 2020, vol. 10, no. 3, art. no. 407, p. [1-9].. eISSN 2079-4991 |
| Keywords [eng] |
optically thin photodetector ; graphene ; Si3N4 membrane ; thermopower |
| Abstract [eng] |
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 μ A/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. |
| Published |
Basel : MDPI AG |
| Type |
Journal article |
| Language |
English |
| Publication date |
2020 |
| CC license |
|
