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Anjani Kumar Tiwari

Nano-Optics and Mesoscopic Optics Laboratory, Tata Institute of Fundamental Research, Mumbai, India

Monday, May 20th, 2013 at 11:00:00 AM  

Conference room Querzoli - LENS - via Nello Carrara 1 - Sesto Fiorentino (Florence)

Published on-line at 01:39:37 PM on Monday, May 6th, 2013

Frequency controlled random lasing from a quasi-one-dimensional array of amplifying resonators

Random lasers with a quasi-one-dimensional system made of amplifying spherical scatterers.

Random lasers are exciting optical sources where amplification is coupled with multiple scattering. They exhibit strong fluctuations in various physical parameters such as output intensity, lasing frequency, spatial mode extent etc. Out of these, the fluctuations in frequency are the major obstruction in practical applications of random lasers.

In this talk, I will present frequency-controlled random lasing from a quasi-one-dimensional system made of amplifying spherical scatterers. Theoretical analysis shows that the lasing peaks originate from the high quality modes generated in the stopgap region of the underlying periodic system. The spatial extent of the modes provides the direct evidence of lasing over photon localized states in these systems.

For further informations, please contact Prof. Diederik Wiersma.