A
Alka Sharma
Researcher at Council of Scientific and Industrial Research
Publications - 46
Citations - 1132
Alka Sharma is an academic researcher from Council of Scientific and Industrial Research. The author has contributed to research in topics: Topological insulator & Photodetector. The author has an hindex of 16, co-authored 41 publications receiving 873 citations. Previous affiliations of Alka Sharma include Academy of Scientific and Innovative Research.
Papers
More filters
Journal ArticleDOI
Fabrication of non-polar GaN based highly responsive and fast UV photodetector
Abhiram Gundimeda,Shibin Krishna,Neha Aggarwal,Alka Sharma,Nita Dilawar Sharma,K.K. Maurya,Sudhir Husale,Govind Gupta +7 more
TL;DR: In this article, the fabrication of ultraviolet photodetector on non-polar (11−20), nearly stress free, Gallium Nitride (GaN) film epitaxially grown on r-plane (1−102) sapphire substrate was reported.
Journal ArticleDOI
Manganese doped zinc sulphide nanoparticles by aqueous method
Ali Azam Khosravi,Manisha Kundu,Beena Annie Kuruvilla,Gajendra S. Shekhawat,Rekha Gupta,Alka Sharma,P. D. Vyas,Sulabha K. Kulkarni +7 more
TL;DR: In this article, aqueous chemical method was used to synthesize zinc sulphide nanoparticles in the size range ∼10-40 A diameter and X-ray diffraction indicated that nanoparticles are crystalline except for those with band gap ∼4.5±0.1 eV.
Journal ArticleDOI
High performance broadband photodetector using fabricated nanowires of bismuth selenide.
TL;DR: It is demonstrated that focused ion beam (FIB) fabricated nanowires of TIs could be used as ultrasensitive visible-NIR nanowire photodetector based on TIs.
Journal ArticleDOI
A Highly Responsive Self-Driven UV Photodetector Using GaN Nanoflowers
Neha Aggarwal,Shibin Krishna,Alka Sharma,Lalit Goswami,Dinesh Kumar,Sudhir Husale,Govind Gupta +6 more
TL;DR: In this paper, a self-driven, highly sensitive, fast responding GaN nanoflower based UV photodetector is reported, which exhibits very low dark current (approximate to nA) with a very high responsivity (132 mA W-1) and detectivity (2.4 x 10(10) Jones).
Journal ArticleDOI
Robust broad spectral photodetection (UV-NIR) and ultra high responsivity investigated in nanosheets and nanowires of Bi2Te3 under harsh nano-milling conditions.
TL;DR: Robust photoconductivity measurements on Bi2Te3 nanosheets and nanowires demonstrating BSP from UV to NIR and an ultra-high photoresponsivity indicate exciting robust nature of topological insulator based nanodevices for optoelectronic applications.