Zobrazeno 1 - 10
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pro vyhledávání: '"Roppo, V"'
We theoretically investigate second harmonic generation in extremely narrow, sub-wavelength semiconductor and dielectric waveguides. We discuss a novel guiding mechanism characterized by the inhibition of diffraction and the suppression of cut-off li
Externí odkaz:
http://arxiv.org/abs/1205.4077
Autor:
Scalora, M., Vincenti, M. A., de Ceglia, D., Akozbek, N., Roppo, V., Bloemer, M. J., Haus, J. W.
We study second and third harmonic generation in centrosymmetric semiconductors at visible and UV wavelengths in bulk and cavity environments. Second harmonic generation is due to a combination of symmetry breaking, the magnetic portion of the Lorent
Externí odkaz:
http://arxiv.org/abs/1109.3431
We have conducted a theoretical study of harmonic generation from a silver grating having slits filled with GaAs. By working in the enhanced transmission regime, and by exploiting phase-locking between the pump and its harmonics, we guarantee strong
Externí odkaz:
http://arxiv.org/abs/1011.6673
We demonstrate second and third harmonic generation from a GaP substrate 500{\mu}m thick. The second harmonic field is tuned at the absorption resonance at 335nm, and the third harmonic signal is tuned at 223nm, in a range where the dielectric functi
Externí odkaz:
http://arxiv.org/abs/1011.0627
Autor:
Roppo, V., Raineri, F., Cojocaru, C., Raj, R., Trull, J., Sagnes, I., Vilaseca, R., Scalora, M.
In this letter we experimentally demonstrate second harmonic conversion in the opaque region of a GaAs cavity with efficiencies of the order of 0.1% at 612nm, using 3ps pump pulses having peak intensities of order of 10MW/cm2. We show that the conver
Externí odkaz:
http://arxiv.org/abs/1010.4693
Autor:
Scalora, M., Vincenti, M. A., de Ceglia, D., Roppo, V., Centini, M., Akozbek, N., Bloemer, M. J.
We present a new theoretical approach to the study of second and third harmonic generation from metallic nanostructures and nanocavities filled with a nonlinear material, in the ultrashort pulse regime. We model the metal as a two-component medium, u
Externí odkaz:
http://arxiv.org/abs/1006.0709
Autor:
Roppo, V., Cojocaru, C., Raineri, F., D'Aguanno, G., Trull, J., Halioua, Y., Raj, R., Sagnes, I., Vilaseca, R., Scalora, M.
We predict and experimentally observe the enhancement by three orders of magnitude of phase mismatched second and third harmonic generation in a GaAs cavity at 650nm and 433nm, respectively, well above the absorption edge. Phase locking between the p
Externí odkaz:
http://arxiv.org/abs/0906.5115
Autor:
Akozbek, N., Roppo, V., Vincenti, M. A., Foreman, J. V., Bloemer, M. J., Haus, J. W., Scalora, M.
We numerically demonstrate inhibition of absorption, optical transparency, and anomalous momentum states of phase locked harmonic pulses in semiconductors, at UV and extreme UV frequencies, in spectral regions where the dielectric constant of typical
Externí odkaz:
http://arxiv.org/abs/0904.4082
Autor:
Alpa, G., Benatti, F., Borghetti, JEAN SEBASTIEN, Carusi, D., Pagliantini, S., Perlingieri, Pietro, Salanitro, UGO ANTONINO, Roppo, V., Volpe, F.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3710::277f7e22df254dbd7e80dcab9b19da97
http://hdl.handle.net/11567/884053
http://hdl.handle.net/11567/884053
Autor:
Kalinowski, K. xkk124@physics.anu.edu.au, Roppo, V., Łukasiewicz, T.1, Świrkowicz, M.1, Sheng, Y.2, Krolikowski, W.2
Publikováno v:
Applied Physics B: Lasers & Optics. Dec2012, Vol. 109 Issue 4, p557-566. 10p.
