Lark-Horovitz Distinguished Professor of Physicsakr@purdue.edu
Office: Physics 168
Telephone: (765) 494-3028
Fax: (765) 494-0706
B.Sc., Physics 1950, Poona University, India
M.Sc., Physics 1953 Raman Research Institute, India
Ph.D., Physics 1956 Raman Research Institute, India
Experimental investigation of collective and localized excitations (vibrational, magnetic, and electronic) in semiconductors and their heterostructures; Raman, Brillouin, photoluminescence spectroscopy; absorption/reflectivity spectra in the visible to far infrared; magneto-optics; and modulation spectroscopy. These techniques are exploited in the context of the physics of II-VI semiconductors including diluted magnetic semiconductors and MBE-grown II-VI, III-V, and II-VI/III-V quantum well structures and novel isotopic effects in semiconductors.
The unique semiconducting and magnetic phenomena exhibited by II-VI and III-V diluted magnetic semiconductors (DMSs) observed in Raman scattering, Faraday and Voigt effect (Raman EPR, Raman; antiferromagnetic resonance; resonance Raman scattering tuned by magnetic field/temperature; modulation spectroscopy). Folded acoustic phonons, confined and propagating optical phonons; quantum confined electronic transitions observed in II-VI, II-VI/III-V and III-V quantum well structures using Raman and modulation spectroscopy; isotopic effects in the electronic and vibrational spectra of diamond, Si Ge and II-VI semiconductors.
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