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Beam focalization in reflection from flat dielectric subwavelength gratings

Autor
Cheng, Y.; Zeng, H.; Trull, J.; Cojocaru, C.; Malinauskas, M.; Jukna, T.; Wiersma, D.; Staliunas, K.
Tipus d'activitat
Article en revista
Revista
Optics letters
Data de publicació
2014-10-15
Volum
39
Número
20
Pàgina inicial
6086
Pàgina final
6089
DOI
https://doi.org/10.1364/OL.39.006086 Obrir en finestra nova
Projecte finançador
CONTROL DE LA DIFRACCON DE LA LUZ EN MEDIOS MODULADOS
Repositori
http://hdl.handle.net/2117/26401 Obrir en finestra nova
URL
https://www.osapublishing.org/ol/abstract.cfm?uri=ol-39-20-6086 Obrir en finestra nova
Resum
We experimentally demonstrate the recently predicted effect of near-field focusing for light beams from flat dielectric subwavelength gratings (SWGs). This SWGs were designed for visible light 532 nm and fabricated by direct laser writing in a negative photoresist, with the refractive index n = 1.5 and the period d = 314 nm. The laterally invariant gratings can focus light beams without any optical axis to achieve the transversal invariance. We show that focal distances can be obtained up to 13 ...
Citació
Cheng, Y. [et al.]. Beam focalization in reflection from flat dielectric subwavelength gratings. "Optics letters", 15 Octubre 2014, vol. 39, núm. 20, p. 6086-6089.
Paraules clau
Laser, Lens, Negative refraction, Photonic crystals, Transmission
Grup de recerca
DONLL - Dinàmica no Lineal, Òptica no Lineal i Làsers

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