Browsing by Subject "Optical properties"

Now showing items 1-3 of 3

High-contrast, all-optical switching in bacteriorhodopsin films

Banyal, R. K; Prasad, B. R (Optical Society of America, 2005-09)

We report experiments with nonlinear-absorption-based, high-contrast, all-optical switching in photochromic bacteriorhodopsin (BR) films. The switching action is accomplished by control of the transmission of a weak probe ...
Polarimetry of Comet P/Halley - Properties of dust

Sen, A. K; Deshpande, M. R; Joshi, U. C; Kameswara Rao, N; Raveendran, A. V (European Southern Observatory, 1991-02)

Comet P/Halley was observed polarimetrically for seven nights in IHW and other continuum filters, during its pre- and postpreihelion passages. These polarimetric observations have been combined with the observations taken ...
A search for intra-night optical variability in radio-quiet QSOs

Gopal-Krishna; Sagar, R; Witta, P. J (Royal Astronomical Society, 1993-06-15)

We report results from a new program, using the 2.34-m Vainu Bappu Telescope, to search for intra-night optical variability in five QSOs which are radio-quiet but optically bright and luminous. Our limited data show mild ...

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