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Título:
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Synthesis of light needles with tunable length and nearly constant irradiance
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Autores:
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Martínez Herrero, Rosario ;
Maluenda, David ;
Carnicer, Artur
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Tipo de documento:
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texto impreso
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Editorial:
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Nature Publishing Group, 2018-02-08
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Dimensiones:
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application/pdf
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Nota general:
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cc_by_nc_sa
info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Optica
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Tipo = Artículo
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Resumen:
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We introduce a new method for producing optical needles with tunable length and almost constant irradiance based on the evaluation of the on-axis power content of the light distribution at the focal area. According to theoretical considerations, we propose an adaptive modulating continuous function that presents a large derivative and a zero value jump at the entrance pupil of the focusing system. This distribution is displayed on liquid crystal devices using holographic techniques. In this way, a polarized input beam is shaped and subsequently focused using a high numerical aperture (NA) objective lens. As a result, needles with variable length and nearly constant irradiance are produced using conventional optics components. This procedure is experimentally demonstrated obtaining a 53 lambda-long and 0.8 lambda-wide needle.
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En línea:
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https://eprints.ucm.es/46836/1/MHerreroR%2006%20libre%2BCC.pdf
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