It is accepted so far that the formation of photonic nanojets requires the use of large dielectric spheres (several wavelengths in diameter). Here we show both numerically and experimentally that similar effects can be obtained with properly engineered sub-wavelength core-shell colloids. The design of the spheres is strongly inspired by a far-field approach for the generation of Bessel beams. (C) 2014 Optical Society of America
Bessel-like photonic nanojets from core-shell sub-wavelength spheres / Grojo, D; Sandeau, N; Boarino, Luca; Constantinescu, C; DE LEO, Maria; Laus, M; Sparnacci, K.. - In: OPTICS LETTERS. - ISSN 0146-9592. - 39:13(2014), pp. 3989-3992. [10.1364/OL.39.003989]
Bessel-like photonic nanojets from core-shell sub-wavelength spheres
BOARINO, LUCA;DE LEO, MARIA;
2014
Abstract
It is accepted so far that the formation of photonic nanojets requires the use of large dielectric spheres (several wavelengths in diameter). Here we show both numerically and experimentally that similar effects can be obtained with properly engineered sub-wavelength core-shell colloids. The design of the spheres is strongly inspired by a far-field approach for the generation of Bessel beams. (C) 2014 Optical Society of AmericaI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
