Title :
Tight light localization in a hyperbolic secant planar slit lens
Author :
Nalimov, A.G. ; Kotlyar, V.V.
Author_Institution :
Image Process. Syst. Inst., Samara, Russia
Abstract :
We show by FDTD simulation that a photonic-crystal hyperbolic secant binary microlens in silicon (with the refractive index n=3.47) of size 2 μm × 5 μm with a slit 50 nm wide and 250 nm long can focus a plane TM-wave into a near-surface focal spot of size λ/23 with a 44% diffraction efficiency. The focus intensity is 60 times higher than the incident wave.
Keywords :
elemental semiconductors; finite difference time-domain analysis; light diffraction; microlenses; optical focusing; photonic crystals; refractive index; silicon; FDTD simulation; Si; diffraction efficiency; focus intensity; hyperbolic secant planar slit lens; light localization; near-surface focal spot; photonic-crystal hyperbolic secant binary microlens; plane TM-wave; refractive index; size 2 mum; size 5 mum; Diffraction; Focusing; Lenses; Metamaterials; Optical waveguides; Photonic crystals; Refractive index;
Conference_Titel :
Advanced Optoelectronics and Lasers (CAOL), 2013 International Conference on
Conference_Location :
Sudak
Print_ISBN :
978-1-4799-0016-9
DOI :
10.1109/CAOL.2013.6657592
