50 citations · 226 across the 11 of their papers we have counts for
11 papers
A complete Raman mapping of phase transitions in Si under indentation
C. R. Das, H. C. Hsu, S. Dhara +7
Crystalline Si substrates are studied for pressure induced phase transformation under indentation at room temperature using Berkovich tip. Raman scattering study is used for the id…
Surface optical Raman modes in InN nanostructures
Satyaprakash Sahoo, M. S. Hu, C. W. Hsu +5
Raman spectroscopic investigations are carried out on one-dimensional nanostructures of InN,such as nanowires and nanobelts synthesized by chemical vapor deposition. In addition to…
Recrystallization of epitaxial GaN under indentation
S. Dhara, C. R. Das, H. C. Hsu +6
We report recrystallization of epitaxial (epi-) GaN(0001) film under indentation.Hardness value is measured close to 10 GPa, using a Berkovich indenter. Pop-in burst in the loading…
Deformation potential dominated phonons in ZnS quantum dots
S. Dhara, A. K. Arora, Jay Ghatak +5
Strong deformation potential (DP) dominated Raman spectra are reported for quantum confined cubic ZnS nanoclusters under off-resonance conditions allowed only in quantum dots. A fl…
Multi-phonon Raman scattering in GaN nanowires
S. Dhara, Sharat Chandra, G. Mangamma +9
UV Raman scattering studies show longitudinal optical (LO) mode up to 4th order in wurtzite GaN nanowire system. Frohlich interaction of electron with the long range electrostatic…
Nitrogen ion beam synthesis of InN in InP (100) at elevated temperature
S. Dhara, P. Magudapathy, R. Kesavamoorthy +8
InN phase is grown in crystalline InP(100) substrates by 50 keV N+ implantation at an elevated temperature of 400 deg C followed by annealing at 525 deg C in N2 ambient. Crystallog…