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 |
|---|---|
| Přispěvatelé: | UAM. Departamento de Física de Materiales |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Materials science
Field (physics) business.industry Optoelectronic tweezers Dielectrophoresis Charge density Física Photovoltaic effect 7. Clean energy Space charge Molecular physics Atomic and Molecular Physics and Optics Crystal Optics Electric field Particle trapping Nanoparticles Surface charge Photovoltaic tweezers business |
| Zdroj: | 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 |
| Popis: | 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 This work was supported by the Spanish Ministerio de Economia y Competitividad under grants MAT2011-28379- C03 and MAT2014-57704-C3 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|