Author/Authors :
Anand، نويسنده , , M and Dharmadhikari، نويسنده , , A.K and Dharmadhikari، نويسنده , , J.A and Mishra، نويسنده , , A and Mathur، نويسنده , , D and Krishnamurthy، نويسنده , , M، نويسنده ,
Abstract :
We report lasing induced by two-photon absorption (TPA) from micro-droplets of a weakly fluorescent dye (DASPI) doped in methanol. Dye-doped methanol droplets, of uniform diameter of 20 μm, are generated using a piezo-driven capillary. The droplet size is determined by a direct imaging technique as well as from peak separations of lasing (morphology dependent resonances – MDRs) spectra. The threshold for TPA-induced lasing of droplets with 0.01 M concentration of the dye is determined to be about 0.4 GW cm−2. The lasing spectral emission from the micro-droplets exhibits well-resolved structure that is related to the MDR.
