Photonic nanojet-induced modes: Fundamentals and applications

Arash Darafsheh, Anatole Lupu, S. A. Burand, Thomas C. Hutchens, Nathaniel M. Fried, Vasily N. Astratov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Photonic nanojet-induced modes (NIMs) have emerged as a new paradigm for understanding the optical properties of chains of dielectric microspheres with wavelength-scale diameters (D≤10λ). Here we show that light focusing and transport properties of chains of submillimeter spheres (D>100λ) are dominated by periodically focused modes (PFMs) which can be considered a geometrical optics analog of NIMs. We review recent geometrical optics results on this subject showing that Brewster angle conditions for TM polarized rays can be periodically reproduced in chains of spheres with index n= √3 =1.73205... giving rise to lossless PFMs with the 2D period. In this work we studied the phase properties of PFMs using a novel method based on Fourier analysis of the high resolution transmission spectra of chains of submillimeter ruby spheres with n∼1.75 at λ=1.2 μm. We demonstrated that PFMs are the best surviving modes in long chains of spheres. Finally, we considered applications of PFMs for focusing multimodal beams in ultra-precise laser surgery.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume8264
DOIs
StatePublished - 2012
Externally publishedYes
EventIntegrated Optics: Devices, Materials, and Technologies XVI - San Francisco, CA, United States
Duration: Jan 23 2012Jan 25 2012

Other

OtherIntegrated Optics: Devices, Materials, and Technologies XVI
CountryUnited States
CitySan Francisco, CA
Period1/23/121/25/12

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Keywords

  • focusing
  • laser surgery
  • microlens
  • microoptics
  • microspheres
  • optical microprobes
  • photonic nanojet

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Darafsheh, A., Lupu, A., Burand, S. A., Hutchens, T. C., Fried, N. M., & Astratov, V. N. (2012). Photonic nanojet-induced modes: Fundamentals and applications. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 8264). [82640X] https://doi.org/10.1117/12.909716