Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Katherine Badham"'
Autor:
Ignacio Moreno, Jeffrey A. Davis, Katherine Badham, María M. Sánchez-López, Joseph E. Holland, Don M. Cottrell
Publikováno v:
Scientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
Abstract We present a proof of concept for a vector beam polarization state spectrum analyzer based on the combination of a polarization diffraction grating (PDG) and an encoded harmonic q-plate grating (QPG). As a result, a two-dimensional polarizat
Externí odkaz:
https://doaj.org/article/9d94de0e41a9408c91a4e7d0c40004fe
Autor:
Don M. Cottrell, María del Mar Sánchez-López, Ignacio Moreno, Katherine Badham, Jeffrey A. Davis, Joseph E. Holland
Publikováno v:
Complex Light and Optical Forces XII.
Vector beams where the polarization state is spatially dependent are being examined as new optical communication channels. We demonstrate a vector beam spectrum analyzer capable of simultaneously determining the topological charge and the state of po
Autor:
Makoto Kurihara, Nobuyuki Hashimoto, Don M. Cottrell, Ayano Tanabe, Ignacio Moreno, Jeffrey A. Davis, María del Mar Sánchez-López, Katherine Badham, Sam W. Delaney
Publikováno v:
SPIE Proceedings.
In this work we report on our achievements in generating switchable and arbitrary vector beams by means of q-plates. Two kind of q-plates are considered: i) a physical prototype from Citizen Co. and ii) a virtual device that is encoded onto a spatial
Autor:
Nobuyuki Hashimoto, María del Mar Sánchez-López, Makoto Kurihara, Katherine Badham, Jeffrey A. Davis, Enrique Hurtado, Ignacio Moreno, Melanie Pierce
Publikováno v:
Applied optics. 54(32)
In this work we study a prototype q-plate segmented tunable liquid crystal retarder device. It shows a large modulation range (5π rad for a wavelength of 633 nm and near 2π for 1550 nm) and a large clear aperture of one inch diameter. We analyze th
Autor:
Jorge Albero, Jeffrey A. Davis, Makoto Kurihara, Don M. Cottrell, María del Mar Sánchez-López, Katherine Badham, Nobuyuki Hashimoto, Ignacio Moreno
Publikováno v:
Japanese Journal of Applied Physics. 55:122202
Vector beams, usually generated using q-plates, are of interest because their polarization state varies spatially. In general, the q-plate performance is examined by illuminating the device and detecting the output beam with polarization states on th
Autor:
Ignacio Moreno, Don M. Cottrell, María del Mar Sánchez-López, Katherine Badham, Jeffrey A. Davis
Publikováno v:
Optics Letters. 41:2270
We generate nondiffracting vector beams where the charge and the polarization state vary with the propagation distance. We use reflective geometry where a parallel-aligned spatial light modulator is used to spatially modulate two orthogonal linear po
Autor:
Ayano Tanabe, Jeffrey A. Davis, Ignacio Moreno, María del Mar Sánchez-López, Katherine Badham, Nobuyuki Hashimotono, Makoto Kurihara, Sam W. Delaney
Publikováno v:
Optical Engineering. 55:030502
We present the use of a q -plate device operating at the 1550 nm telecommunications wavelength. A prototype liquid-crystal device from Citizen Holdings Co. is demonstrated to be useful for the generation of vector beams and orbital angular momentum t
Autor:
Jeffrey A. Davis, María del Mar Sánchez-López, Don M. Cottrell, Katherine Badham, Ignacio Moreno
Publikováno v:
Optics Letters. 41:1305
We generate programmable vector beams with arbitrary q-plates encoded using a spatial light modulator system. Consequently, we can analyze new and exotic q-plate designs without the difficulty of fabricating individual plates. We show experimental re
Autor:
María del Mar Sánchez-López, Katherine Badham, Jeffrey A. Davis, Don M. Cottrell, Ignacio Moreno, Jorge Albero
Publikováno v:
Optics Express. 24:907
We propose specially designed double anisotropic polarization diffraction gratings capable of producing a selective number of diffraction orders and with selective different states of polarization. Different polarization diffraction gratings are demo
Autor:
Nobuyuki Hashimoto, María del Mar Sánchez-López, Enrique Hurtado, Katherine Badham, Sam W. Delaney, Ayano Tanabe, Jeffrey A. Davis, Ignacio Moreno
Publikováno v:
Optics Letters. 41:13
We examine the performance of a tunable liquid crystal q-plate in a reflective geometry. When the device is tuned to a half-wave retardance, it operates as a q-plate with twice the value (2q) by adding a quarter-wave retarder between the mirror and t