Optoelectronic tweezers based on photorefractive space charge fields: recent achievements and challenge

Autor: A. Alcazar, Juan F. Muñoz-Martínez, Angel García-Cabañes, I. Elvira, Mercedes Carrascosa, Luis Arizmendi, J. B. Ramiro

Publikováno v: Journal of Physics: Conference Series, ISSN 1742-6596, 2017, Vol. 867
Archivo Digital UPM
Universidad Politécnica de Madrid

We present an overview of the operation of optoelectronic tweezers based on the photorefractive effect, paying special attention to the more recent results achieved by our group. The main challenges faced by the technique to enhance its technological

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::66321e51b041fabe2438efb618c7a3d5
https://oa.upm.es/50474/

Orientation and patterning of zeolite micro-crystals on photorefractive templates

Autor: J. B. Ramiro, Fernando Agulló-López, Álvaro Barroso, Cornelia Denz, I. Elvira, Juan F. Muñoz-Martínez, Mercedes Carrascosa, Angel García-Cabañes

Publikováno v: Journal of Physics: Conference Series, ISSN 1742-6596, 2017, Vol. 867
Archivo Digital UPM
Universidad Politécnica de Madrid

Evanescent fields photo-generated on the surface of photorefractive Fe-doped LiNbO3 templates have been used to trap and align anisotropic zeolite micro-cylinders. x- and z-cut crystal configurations have been employed to obtain different 1D and 2D z

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ef480ecebf16dec16ec70a4982a6219
https://oa.upm.es/50473/

Comparative theoretical analysis between parallel and perpendicular geometries for 2d particle patterning in photovoltaic ferroelectric substrates

Autor: Mercedes Carrascosa, Cándido Arregui, A. Alcazar, J. B. Ramiro, Juan F. Muñoz-Martínez, A. Méndez

Publikováno v: Biblos-e Archivo. Repositorio Institucional de la UAM
instname
Journal of the European Optical Society-Rapid publications, ISSN 1990-2573, 2015, Vol. 10, No. 2015
Archivo Digital UPM
Universidad Politécnica de Madrid

This paper describes the dielectrophoretic potential created by the evanescent electric field acting on a particle near a photovoltaic crystal surface depending on the crystal cut. This electric field is obtained from the steady state solution of the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15cd280164e512571c81bde4e90ca923
https://hdl.handle.net/10486/675566

Analysis and optimization of propagation losses in LiNbO 3 optical waveguides produced by swift heavy-ion irradiation

Autor: José Olivares, M. Jubera, A. Méndez, J. B. Ramiro, Angel García-Cabañes, Fernando Agulló-López, J. Villarroel, Mercedes Carrascosa

Publikováno v: App Phys B, ISSN 1432-0649, 2012-04, Vol. 107, No. 1
Archivo Digital UPM
instname
Digital.CSIC. Repositorio Institucional del CSIC

The propagation losses (PL) of lithium niobate optical planar waveguides fabricated by swift heavy-ion irradiation (SHI), an alternative to conventional ion implantation, have been investigated and optimized. For waveguide fabrication, congruently me

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bbc8e86ed944f9a5946a62dca136d8c9
http://hdl.handle.net/10261/56910

Photovoltaic laser beam degradation in lithium niobate planar waveguides: two-center model approach

Autor: A. Alcazar, José Manuel Cabrera, A. Méndez, J. B. Ramiro, J. Villarroel, Angel García-Cabañes, Mercedes Carrascosa

Publikováno v: Journal of the Optical Society of America B. 31:919

Photovoltaic laser beam degradation in lithium niobate (LiNbO3) has been investigated through a finite-differences beam propagation method for nonlinear media. The simulations use a two-center model (Fe2+↔Fe3+, NbLi4+↔NbLi5+) that has been recent

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::aadb90b256311f05ec53fa0d3358381e
https://doi.org/10.1364/josab.31.000919