Chirag Gupta
University of California, Santa Barbara
50 Papers
173 Citations
Chirag Gupta is an academic researcher from University of California, Santa Barbara. The author has contributed to research in topics: Gallium nitride & Breakdown voltage. The author has an hindex of 13, co-authored 45 publications. Previous affiliations of Chirag Gupta include Indian Institute of Technology Kanpur & University of California.
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Papers
Method of growing elastically relaxed crack-free AlGaN on GaN as substrates for ultra-wide bandgap devices using porous GaN
Shubhra S. Pasayat,Nirupam Hatui,Weiyi Li,Chirag Gupta,Shuji Nakamura,Steven P. DenBaars,Stacia Keller,Umesh K. Mishra +7 more
TL;DR: In this paper, a crack-free 1.3 µm thick elastically relaxed AlxGa1−xN layers were demonstrated on compliant high fill-factor 10 µm2 tile patterned GaN-on-porous-GaN pseudo-substrates (PSs).
Ultra-high silicon doped N-polar GaN contact layers grown by metal-organic chemical vapor deposition
Nirupam Hatui,Athith Krishna,Haoran Li,Chirag Gupta,Brian Romanczyk,Dillon Acker-James,Elaheh Ahmadi,Stacia Keller,Umesh K. Mishra +8 more
TL;DR: In this paper, high quality n+ type doped N-polar GaN contact layers were grown using metal-organic chemical vapor deposition with carrier concentration as high as 3.5×1020 cm-3 and an electron mobility of 80 cm2V-1s-1 at room temperature.
Growth of strain-relaxed InGaN on micrometer-sized patterned compliant GaN pseudo-substrates
Shubhra S. Pasayat,Chirag Gupta,Matthew S. Wong,Yifan Wang,Shuji Nakamura,Steven P. DenBaars,Stacia Keller,Umesh K. Mishra +7 more
TL;DR: In this paper, the compliant behavior of high fill-factor 10'×'10' μm2 square patterned GaN-on-porous GaN pseudo-substrates was demonstrated by utilizing porous GaN as a semi-flexible underlayer.
Color-tunable <10 μm square InGaN micro-LEDs on compliant GaN-on-porous-GaN pseudo-substrates
Shubhra S. Pasayat,Ryan Ley,Chirag Gupta,Matthew S. Wong,Cheyenne Lynsky,Yifan Wang,Michael J. Gordon,Shuji Nakamura,Steven P. DenBaars,Stacia Keller,Umesh K. Mishra +10 more
TL;DR: In this paper, two methods to tune the emission wavelength of micro-LEDs fabricated on tile patterned compliant GaN-on-porous-GaN pseudo-substrates (PSs) are presented.
An improved methodology for extracting interface state density at Si 3 N 4 /GaN
TL;DR: In this article, a series of metal-insulator-semiconductor capacitors consisting of Si3N4 dielectrics with different thicknesses on GaN have been fabricated to investigate their interface states.