Zobrazeno 1 - 10
of 77
pro vyhledávání: '"Sit, Alicia"'
Autor:
Sit, Alicia
When nematic liquid crystals are placed between parallel glass plates with differing alignment directions, the bulk will twist in order to match the boundary conditions. This phenomenon of a twisted cell has been used extensively for the development
Externí odkaz:
http://hdl.handle.net/10393/45583
When an external field is applied across a liquid-crystal cell, the twist and tilt distributions cannot be calculated analytically and must be extracted numerically. In the standard approach, the Euler-Lagrange equations are derived from the minimiza
Externí odkaz:
http://arxiv.org/abs/2403.00948
Nematic liquid-crystal devices are a powerful tool to structure light in different degrees of freedom, both in classical and quantum regimes. Most of these devices exploit either the possibility of introducing a position-dependent phase retardation w
Externí odkaz:
http://arxiv.org/abs/2311.04773
Autor:
Gao, Xiaoqin, Zhang, Yingwen, D'Errico, Alessio, Sit, Alicia, Heshami, Khabat, Karimi, Ebrahim
Publikováno v:
Phys. Rev. Lett. 132, 063802 (2024)
Vector beams (VBs) are fully polarized beams with spatially varying polarization distributions, and they have found widespread use in numerous applications such as microscopy, metrology, optical trapping, nano-photonics, and communications. The entan
Externí odkaz:
http://arxiv.org/abs/2304.14280
Publikováno v:
Phys. Rev. Research 3, 033226 (2021)
The polarization of a monochromatic optical beam lies in a plane, and in general, is described by an ellipse, known as the polarization ellipse. The polarization ellipse in the tight focusing (non-paraxial) regime forms non-trivial three-dimensional
Externí odkaz:
http://arxiv.org/abs/2103.06958
Autor:
Sit, Alicia
This thesis encompasses a body of experimental work on the use of structured light in quantum cryptographic protocols. In particular, we investigate the ability to perform quantum key distribution through various quantum channels (fibre, free-space,
Externí odkaz:
http://hdl.handle.net/10393/39648
Autor:
Bouchard, FrédÉric, Sit, Alicia, Zhang, Yingwen, Fickler, Robert, Miatto, Filippo M., Yao, Yuan, Sciarrino, Fabio, Karimi, Ebrahim
Nearly 30 years ago, two-photon interference was observed, marking the beginning of a new quantum era. Indeed, two-photon interference has no classical analogue, giving it a distinct advantage for a range of applications. The peculiarities of quantum
Externí odkaz:
http://arxiv.org/abs/2006.09335
Autor:
Hufnagel, Felix, Sit, Alicia, Bouchard, Frédéric, Zhang, Yingwen, England, Duncan, Heshami, Khabat, Sussman, Benjamin J., Karimi, Ebrahim
Underwater quantum communication has recently been explored using polarization and orbital angular momentum. Here, we show that spatially structured modes, e.g., a coherent superposition of beams carrying both polarization and orbital angular momentu
Externí odkaz:
http://arxiv.org/abs/2004.04821
Autor:
Hufnagel, Felix, Sit, Alicia, Grenapin, Florence, Bouchard, Frédéric, Heshami, Khabat, England, Duncan, Zhang, Yingwen, Sussman, Benjamin J., Boyd, Robert W., Leuchs, Gerd, Karimi, Ebrahim
We examine the propagation of optical beams possessing different polarization states and spatial modes through the Ottawa River in Canada. A Shack-Hartmann wavefront sensor is used to record the distorted beam's wavefront. The turbulence in the under
Externí odkaz:
http://arxiv.org/abs/1905.09437
Autor:
Zanfrognini, Matteo, Rotunno, Enzo, Frabboni, Stefano, Sit, Alicia, Karimi, Ebrahim, Hohenester, Ulrich, Grillo, Vincenzo
Recently, a new device to measure the Orbital Angular Momentum (OAM) electronic spectrum after elastic/inelastic scattering in a transmission electron microscope has been introduced. We modified the theoretical framework needed to describe convention
Externí odkaz:
http://arxiv.org/abs/1811.10444