Zobrazeno 1 - 10
of 615
pro vyhledávání: '"Tasca, D."'
Autor:
Almeida, F., Sousa, I., Kremer, O., da Silva, B. Pinheiro, Tasca, D. S., Khoury, A. Z., Temporão, G., Guerreiro, T.
Publikováno v:
Phys. Rev. Lett. 131, 163601 (2023)
We experimentally demonstrate stable trapping and controlled manipulation of silica microspheres in a structured optical beam consisting of a dark focus surrounded by light in all directions - the so-called Dark Focus Tweezer. Results from power spec
Externí odkaz:
http://arxiv.org/abs/2302.01953
Autor:
da Silva, B. Pinheiro, Buono, W. T., Pereira, L. J., Tasca, D. S., Dechoum, K., Khoury, A. Z.
We demonstrate the spin to orbital angular momentum transfer in the nonlinear mixing of structured light beams. A vector vortex is coupled to a circularly polarized Gaussian beam in noncollinear second harmonic generation under type-II phase match. T
Externí odkaz:
http://arxiv.org/abs/2108.13190
Publikováno v:
Phys. Rev. Lett. 124, 033902 (2020)
We investigate pattern revivals in specially designed optical structures that combine different transverse modes. In general, the resulting pattern is not preserved under free propagation and gets transformed due to non synchronized Gouy phases. Howe
Externí odkaz:
http://arxiv.org/abs/1908.01740
We investigate the dynamical properties of a type-II optical parametric oscillator pumped by a structured light beam carrying orbital angular momentum. Different dynamical regimes are theoretically derived and experimentally demonstrated, depending o
Externí odkaz:
http://arxiv.org/abs/1907.00026
Publikováno v:
Phys. Rev. A 99, 043820 (2019)
We use astigmatic transformations to characterize two-dimensional superpositions of Orbital Angular Momentum (OAM) states in laser beams. We propose two methods for doing this, both relying only on astigmatic transformations, viewed as rotations on t
Externí odkaz:
http://arxiv.org/abs/1811.02939
Publikováno v:
Phys. Rev. A 98, 063825 (2018)
We investigate the transverse mode structure of the down-converted beams generated by a type-II optical parametric oscillator (OPO) driven by a structured pump. Our analysis focus on the selection rules imposed by the spatial overlap between the tran
Externí odkaz:
http://arxiv.org/abs/1809.09235
Autor:
Arruda, M. F. Z., Soares, W. C., Walborn, S. P., Tasca, D. S., Kanaan, A., de Araújo, R. Medeiros, Ribeiro, P. H. Souto
Publikováno v:
Phys. Rev. A 98, 023850 (2018)
The advanced-wave picture is "... an intuitive treatment of two-photon correlation with the help of the concept of an effective field acting upon one of the two detectors and formed by parametric conversion of the advanced wave emitted by the second
Externí odkaz:
http://arxiv.org/abs/1805.06484
Publikováno v:
Phys. Rev. A 97, 052103 (2018)
Mutual unbiasedness of the eigenstates of phase-space operators-such as position and momentum, or their standard coarse grained versions-exists only in the limiting case of infinite squeezing. In [Phys. Rev. Lett. 120, 040403 (2018)] it was shown tha
Externí odkaz:
http://arxiv.org/abs/1804.04480
Autor:
de Araújo, R. Medeiros, Häffner, T., Bernardi, R., Tasca, D. S., Lavery, M. P. J., Padgett, M. J., Kanaan, A., Céleri, L. C., Ribeiro, P. H. Souto
Publikováno v:
Journal of Physics Communications 2, 035012 (2018)
Non-equilibrium thermodynamics and quantum information theory are interrelated research fields witnessing an increasing interest, both theoretical and experimental. This is manly due to the broadness of these theories, which found applications in man
Externí odkaz:
http://arxiv.org/abs/1705.02990
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