Photonic nanojet properties of dielectric microcylinders

Arash Darafsheh, Douglas Bollinger

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

11 Scopus citations

Abstract

In recent years, it has been demonstrated that micron-scale dielectric spheres and cylinders can form an intense sharply focused photon beam, termed a photonic nanojet. The photonic nanojet effect can be used in a broad range of biomedical and photonics applications, including super-resolution microscopy, optical endoscopy, spectroscopy, and nanolithography. In this work, by means of finite-difference time-domain (FDTD) numerical simulation, we studied the nanojet properties of dielectric microcylinders over a wide range of diameters (4λ-20λ) and refractive indices (1.5-2.0), where λ is the wavelength of light. We studied how the nanojet beam size, intensity, and focal distance vary as a function of size and refractive index of the microcylinders, and refractive index contrast between the microcylinders and the background medium surrounding them.

Original languageEnglish
Title of host publicationIntegrated Optics
Subtitle of host publicationDevices, Materials, and Technologies XXI
EditorsGualtiero Nunzi Conti, Sonia M. Garcia-Blanco
PublisherSPIE
ISBN (Electronic)9781510606531
DOIs
StatePublished - 2017
EventIntegrated Optics: Devices, Materials, and Technologies XXI 2017 - San Francisco, United States
Duration: Jan 30 2017Feb 1 2017

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10106
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceIntegrated Optics: Devices, Materials, and Technologies XXI 2017
Country/TerritoryUnited States
CitySan Francisco
Period01/30/1702/1/17

Keywords

  • Diffraction
  • FDTD
  • Focusing
  • Microcylinder
  • Photonic nanojet

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