Zobrazeno 1 - 10
of 910
pro vyhledávání: '"B. Pinheiro"'
Autor:
de Oliveira, M. Gil, Junior, A. L. S. Santos, Lima, P. M. R., Barbosa, A. C., da Silva, B. Pinheiro, Padua, S., Khoury, A. Z.
We study the tomography of spatial qudits encoded on structured light photons. While direct position measurements with cameras do not provide an informationally complete Positive Operator Valued Measure (POVM) in the space of fixed order modes, we co
Externí odkaz:
http://arxiv.org/abs/2404.05616
Autor:
de Oliveira, M. Gil, Junior, A. L. S. Santos, Barbosa, A. C., da Silva, B. Pinheiro, Santos, G. H. dos, Cañas, G., Ribeiro, P. H. Souto, Walborn, S. P., Khoury, A. Z.
We investigate theoretically and experimentally the optical second harmonic generation (SHG) with a twisted Gaussian Schell model (TGSM) beam as the fundamental field. We use Type-II phase matching and analyze the cross spectral density (CSD) of the
Externí odkaz:
http://arxiv.org/abs/2403.04040
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, Santos, G. H. dos, de Oliveira, A. G., da Silva, N. Rubiano, Buono, W. T., Gomes, R. M., Soares, W. C., Jesus-Silva, A. J., Fonseca, E. J. S., Ribeiro, P. H. Souto, Khoury, A. Z.
A triangular-lattice pattern is observed in light beams resulting from the spatial cross modulation between an optical vortex and a triangular shaped beam undergoing parametric interaction. Both up- and down-conversion processes are investigated, and
Externí odkaz:
http://arxiv.org/abs/2206.06153
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
Autor:
F. C. Santos, J. E. F. Figueiredo, R. B. Pinheiro, L. V. Cota, A. A. Vasconcelos, M. R. Albuquerque Filho, R. V. Costa, M. M. Pastina, D. D. Silva-Araújo
Publikováno v:
Brazilian Journal of Biology, Vol 83 (2023)
Abstract The maize yield, nutritional status, and grain fumonisins concentration were evaluated in different genotypes, doses, and nitrogen sources (N) in two years and three locations. Two experiments were carried out in each area and year in an exp
Externí odkaz:
https://doaj.org/article/d93a9b9fa4a8480c8848e46e23205ce5
Autor:
da Silva, B. Pinheiro, Marques, B. A. D., Rodrigues, R. B., Ribeiro, P. H. Souto, Khoury, A. Z.
Publikováno v:
Phys. Rev. A 103, 063704 (2021)
We developed a method to characterize arbitrary superpositions of light orbital angular momentum (OAM) with high fidelity by using astigmatic tomography and machine learning processing. In order to define each superposition unequivocally, we combine
Externí odkaz:
http://arxiv.org/abs/2012.00167
Autor:
Joaquim M. B. Pinheiro, Marilyn Fisher, Upender K. Munshi, Rubia Khalak, Kate A. Tauber, James J. Cummings, Jennifer B. Cerone, Meredith Monaco-Brown, Gina Geis, Rehman Chowdhry, Mary Fay, Anshu A. Paul, Carolyn Levine, Phillip Pan, Michael J. Horgan
Publikováno v:
Children, Vol 11, Iss 2, p 217 (2024)
Continuous improvement in the clinical performance of neonatal intensive care units (NICU) depends on the use of locally relevant, reliable data. However, neonatal databases with these characteristics are typically unavailable in NICUs using paper-ba
Externí odkaz:
https://doaj.org/article/01fba83b46cd4d00a6ffc2a3e852b6e2
Autor:
Melo, Bruno, Brandão, Igor, da Silva, B. Pinheiro, Rodrigues, R. B., Khoury, A. Z., Guerreiro, Thiago
Publikováno v:
Phys. Rev. Applied 14, 034069 (2020)
The superposition of a Gaussian mode and a Laguerre-Gauss mode with $\ell=0,p\neq0$ generates the so-called bottle beam: a dark focus surrounded by a bright region. In this paper, we theoretically explore the use of bottle beams as an optical trap fo
Externí odkaz:
http://arxiv.org/abs/2006.15455
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