"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Photonic nanojet enhancement of dielectric microcylinders with metallic coating

CHENG-YANG LIU1

Affiliation

  1. Department of Mechanical and Electro-Mechanical Engineering, Tamkang University, No. 151, Ying-chuan Road, Tamsui District, New Taipei City, Taiwan

Abstract

The detailed analysis of localized photonic nanojets generated at the shadow side surfaces of dielectric microcylinders with different metallic coatings illuminated by a plane wave is reported. Using high resolution finite-difference time-domain simulation, we have found that the photonic nanojets have waists smaller than the diffraction limit and power modulation by metallic coatings. The intensity enhancement of nanojets depends on the thickness of different metallic coatings. We have further analyzed the effect of refractive index and diameter upon the focal length of photonic nanojets. The results may provide a new ultra-microscopy technique of using visible light to detect and image nanoscale objectives such as nanoparticles, optical gratings, and single molecules..

Keywords

Photonic nanojet, Microcylinder, Power enhancement.

Submitted at: Sept. 24, 2012
Accepted at: April 11, 2013

Citation

CHENG-YANG LIU, Photonic nanojet enhancement of dielectric microcylinders with metallic coating, Journal of Optoelectronics and Advanced Materials Vol. 15, Iss. 3-4, pp. 150-154 (2013)