Bookey, H.T., McCarthy, J., Kar, A.K., Pal, B.P., Dasgupta, S., Dianov, E., ...
Propagation of femtosecond pulses in a photonic band-gap silica core Bragg fiber is experimentally studied. Nonlinear spectral broadening is demonstrated in conformity with predictions made in a...
Exciton-photon coupling in a ZnSe based microcavity fabricated using epitaxial liftoff (2007)
Curran, A., Morrod, J. K., Prior, K. A., Kar, A. K., Warburton, R. J.
We report the observation of strong exciton-photon coupling in a ZnSe based microcavity fabricated using epitaxial liftoff. Molecular beam epitaxial grown ZnSe/Zn$_{0.9}$Cd$_{0.1}$Se quantum wells...
Galbraith, I., Chari, R., Pellegrini, S., Phillips, P. J., Dent, C. J., ...
Measurements of the THz absorption and the time-resolved photoluminescence have been performed on the same GaAs quantum well sample. The strength of the absorption at the internal 1s-2p exciton...
Galbraith, I, Chari, R, Pellegrini, S, Phillips, P J, Dent, C J, Van Der Meer, A F, ...
Measurements of the THz absorption and the time-resolved photoluminescence have been performed on the same GaAs quantum well sample. The strength of the absorption at the internal 1s-2p exciton...
Excitonic signatures in Photoluminescence and Terehertz Absorption (2005)
Galibrath, I, Chari, R, Pellegrini, S, Phillips, P J, Dent, C J, ...
Excitonic signatures in photoluminescence and terahertz absorption (2003)
Chari, R., Galbraith, I., Phillips, J., Pellegrini, S., Dent, C. J., Kar, A. K., ...
By measuring THz absorption and time-resolved photoluminescence on the same GaAs quantum well sample we confirm the recent prediction of Kira that PL at the exciton frequency does not require a...
Kar, A K, Dhar, A, Ray, S K, Mathur, B K, Bhattacharya, D, Chopra, K L
Thin films of La0.67Ca0.33MnO3 have been deposited at room temperature on LaAlO3(100) substrates by dc magnetron sputtering. The as-deposited films are amorphous and become polycrystalline on...
Room-Temperature Optical Nonlinearities of Electronic Origin in ZnSe. (1998)
Ji, W., Milward, J. R., Kar, A. K., Wherrett, B. S., Pidgeon, C. R.
Nonlinear temporal transmission and degenerate four-wave mixing have been observed in polycrystalline ZnSe at room temperature. The nonlinear effects result from free carriers generated by nanosecond...
Electronic Self-Defocusing of Nanosecond Laser Pulses in Bulk ZnSe. (1998)
Milward, J. R., Ji, W., Kar, A. K., Pidgeon, C. R., Wherrett, B. S.
Using nanosecond laser pulses, a large refractive nonlinearity (-2 x 10 to the minus 20th power cu cm) has been observed in polycrystalline ZnSe across a range of wavelengths just below the band...
Fast optical switching and optical bistability in a PbSnSe etalon. (1987)
Reid, J.J.E., Kar, A.K., MacKenzie, H.A., Chua, P.L., Grisar, R., Preier, H.M.
Wir berichten über die Beobachtung von optischer Bistabilität mit optischen Schaltzeiten im Nanosekunden-Bereich in dem Bleichalkogenid-Halter Pb(1-X)SnXSe. Die beobachteten refraktiven optischen...
Dispersive optical bistability in a PbSnSe etalon at room temperature. (1987)
Reid, J.J.E., Kar, A.K., MacKenzie, H.A., Grisar, R., Preier, H.M.
Wir berichten über die Beobachtung von optischer Bistabilität bei Raumtemperatur in einem Bleichalkogenid-Halbleiter unter Dauerstrichbedingungen. In der Transmission von CO-Laserstrahlung durch...
Optical switching in PbSnSe at low temperature. (1986)
Kar, A.K., Ball, D., Grisar, R., Preier, H.M.
Wir berichten ueber die erste Beobachtung von optischem Schalten in Bleichchlkogenid-Halbleitern. In der Transmission gepulster CO tief 2-Laserstrahlung durch n-leitendes Pb tief 0.978 Sn tief 0.022...
Kar, A K, Ghosh, A S, Chauhan, K, Ahamed, J, Basu, J, Chakrabarti, P, ...
A beta-lactam-sensitive strain (C152) of Shigella dysenteriae showed two major outer membrane proteins (OMPs) with M(r)s of 43,000 and 38,000, while the clinical isolate M2 lacked the 43,000-Mr OMP,...
Kar, A K, Ghosh, A S, Chauhan, K, Ahamed, J, Basu, J, Chakrabarti, P, ...
A beta-lactam-sensitive strain (C152) of Shigella dysenteriae showed two major outer membrane proteins (OMPs) with M(r)s of 43,000 and 38,000, while the clinical isolate M2 lacked the 43,000-Mr OMP,...