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Prof. Eric Mazur

Harvard University

Thursday, July 18th, 2013 at 11:00:00 AM  

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

Published on-line at 02:53:01 PM on Monday, July 15th, 2013

Nonlinear optics at the nanoscale

Femtosecond laser pulses, long silica nanowires and nonlinear optical phenomena.

We explore nonlinear optical phenomena at the nanoscale by launching femtosecond laser pulses into long silica nanowires. Using evanescent coupling between wires we demonstrate a number of nanophotonic devices. At high intensity the nanowires produce a strong supercontinuum over short interaction lengths (less than 20 mm) and at a very low energy threshold (about 1 nJ), making them ideal sources of coherent white-light for nanophotonic applications. The spectral broadening reveals an optimal fiber diameter to enhance nonlinear effects with minimal dispersion.

We also present a device that permits a number of all-optical logic operations with femtosecond laser pulses in the nanojoule range.

For further informations, please contact Prof. Diederik Wiersma.