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19 October 2020 Schottky barrier photodetector utilizing tungsten grating nanostructure
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Schottky barrier photodetector (PD) (tungsten/nickel/aluminum nitride) based on stacked tungsten gratings is reported in our work. The absorbance of the grating-based structure is obtained using rigorous coupled-wave analysis method. In addition, a responsivity value of 6.164  mA  /  W is calculated at λ  =  559.38  nm based on Fowler’s model. More than three times enhancement in responsivity is achieved as compared with that of bulk structure (without grating) based Schottky barrier PD. In addition, a detectivity value of 33.11  ×  1011  cm Hz1/2  /  W is obtained. Furthermore, the effect of grating variables and incident angle on responsivity are also demonstrated. In future, the proposed structure can also be used as a plasmonic sensor, absorber, or spectral filter.

© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE) 1934-2608/2020/$28.00 © 2020 SPIE
Ankit Kumar Pandey and Anuj Kumar Sharma "Schottky barrier photodetector utilizing tungsten grating nanostructure," Journal of Nanophotonics 14(4), 046002 (19 October 2020).
Received: 22 July 2020; Accepted: 6 October 2020; Published: 19 October 2020

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