Author Archive for: silviag
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We have numerically studied the Anderson localization (AL) in 3D disordered systems, where its experimental demonstration is particularly tricky because of the restrictive Ioffe-Regel criterion. We employ an ab initio approach by using a finite difference time domain (FDTD) code in order to simulate a time-of-flight experiment to demonstrate the optical AL in micron-sized samples.
We also used the FDTD code to investigate the effect of disorder on the optomechanical forces.… Read the rest
By exploiting the mechanism of supercavitation we are able to realize laser-induced multi-scale structure on the surface of Graphene-Oxide (GO) based polymeric matrices. The objective of this activity is twofold. From a fundamental point of view, we want to investigate the role of a multi-scale topological structure on the mechanism ruling the growth of microorganism ranging from the bacteria and fungi to human stem cells.… Read the rest
The study of nonlinear propagation of light at a quantum level may offer a complete a scenario to understand the action of nonlinearity at a low photon number regime can unveil unknown and totally new optical effects.
The first phenomenon we decided to investigate is the propagation of quantum optical solitons. In fact, though classical solitons (CSs) are very well studied, QSs have a much richer dynamics that may provide many new solutions for quantum computing and cryptography.… Read the rest
The cascade of resonant PT-symmetric topological structures is shown to emit laser light with a frequency comb spectrum. We consider optically active topological lattices supporting edge modes at regularly spaced frequencies. When the amplified resonances in the PT-broken regime match the edge modes of the topological gratings, we predict the emission of discrete laser lines. A proper design enables the engineering of the spectral features for specific applications.… Read the rest
Via dei Taurini 19, 00185 Roma
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ROMA, LA SAPIENZA
Dipartimento Fisica Nuovo Edifico Università La Sapienza – P.le Aldo Moro, 5 – 00185 Roma
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Politecnico di Torino,
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10129 Torino (TO)
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FAX: +39 011 0907399