Wednesday, 2 March 2016, 11:30
Sala Grande Palazzina B via alla Cascata 56/C
Femtosecond laser waveguide writing in glasses and crystals
1Dipartimento di Fisica, Politecnico di Milano, Milano, Italy
2Istituto di Fotonica e Nanotecnologie – CNR, Milano, Italy
By harnessing the extreme intensities provided by focused ultrashort femtosecond laser pulses, light may be nonlinearly absorbed through multiphoton absorption to deposit energy and modify a micrometer-sized volume beneath the surface of transparent materials. Through judicious choice of the laser processing parameters, this permanent bulk modification is an increase in the refractive index, which can be exploited to make 3D optical waveguides in glasses and crystals for novel devices for telecom, sensing and quantum information applications.
Keywords: Femtosecond Laser; Waveguides; Quantum Information.