Control of the Onset of Filamentation in Condensed Media (2007)
Dharmadhikari, A. K., Alti, K., Dharmadhikari, J. A., Mathur, D.
Propagation of intense, ultrashort laser pulses through condensed media like crystals of BaF$_2$ and sapphire results in the formation of filaments. We demonstrate that the onset of filamentation may...
All-optical Control of the Propagation of Intense Laser Light in Condensed Media (2006)
Dharmadhikari, A. K., Alti, K., Dharmadhikari, J. A., Mathur, D.
We experimentally demonstrate optical control of filamentation that occurs during propagation of intense, ultrashort laser pulses through crystals like barium fluoride and sapphire. Control is...
Multiple optical traps from a single laser beam using a mechanical element (2006)
Dharmadhikari, J. A., Dharmadhikari, A. K., Mathur, D.
The use of a wire mesh facilitates creation of multiple optical traps for manipulation of small micron or sub-micron particles. Such an array of optical traps can be easily controlled. The trap that...
Euler buckling-induced folding and rotation of red blood cells in an optical trap (2006)
Ghosh, Abhijit, Sinha, Supurna, Dharmadhikari, J.A., Roy, S., Dharmadhikari, A.K., Samuel, J., ...
Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
Euler buckling in red blood cells: An optically driven biological micromotor (2005)
Ghosh, A., Sinha, Supurna, Dharmadhikari, J. A., Roy, S., Dharmadhikari, A. K., Samuel, J., ...
We investigate the physics of an optically-driven micromotor of biological origin. A single, live red blood cell, when placed in an optical trap folds into a rod-like shape. If the trapping laser...
Amplified Spontaneous Emission enhanced Forward Stimulated Raman Scattering in dye solutions (2002)
Dharmadhikari, J. A., Dharmadhikari, A. K., Mishra, Alpana., Kumar, G. Ravindra
We study forward stimulated Raman emission from weakly fluorescent dye 4'-diethylamino-N-methyl-4-stilbazolium tosylate (DEST) in 1,2,dichloroethane solution excited by a 28 ps, 532 nm Nd: YAG laser....