Comparative theoretical analysis between parallel and perpendicular geometries for 2d particle patterning in photovoltaic ferroelectric substrates
Entity
UAM. Departamento de Física de MaterialesPublisher
European Optical Society (EOS)Date
2015Citation
10.2971/jeos.2015.15026
Journal of the European Optical Society 10 (2015): 1-7
ISSN
1990-2573 (print)DOI
10.2971/jeos.2015.15026Funded by
This work was supported by the Spanish Ministerio de Economia y Competitividad under grants MAT2011-28379- C03 and MAT2014-57704-C3Project
Gobierno de España. MAT2011-28379-C03; Gobierno de España. MAT2014-57704-C3Editor's Version
http://dx.doi.org/10.2971/jeos.2015.15026Subjects
Dielectrophoresis; Nanoparticles; Optoelectronic tweezers; Particle trapping; Photovoltaic tweezers; FísicaRights
© 2015, European Optical Society (EOS)Abstract
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 Kukhtarev equations for the photovoltaic effect, where the diffusion term has been disregarded. First, the space charge field generated by a small, square, light spot where d ≪ l (being d a side of the square and l the crystal thickness) is studied. The surface charge density generated in both geometries is calculated and compared as their relation determines the different properties of the dielectrophoretic potential for both cuts. The shape of the dielectrophoretic potential is obtained and compared for several distances to the sample. Afterwards other light patterns are studied by the superposition of square spots, and the resulting trapping profiles are analysed. Finally the surface charge densities and trapping profiles for different d/l relations are studied
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Google Scholar:Arregui, C.
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Ramiro, J.B.
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Alcázar, A.
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Méndez, A.
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Muñoz-Martínez, Juan F.
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Carrascosa Rico, Mercedes
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