Contact focusing multimodal microprobes for ultraprecise laser tissue surgery.

Journal Article (Journal Article)

Focusing of multimodal beams by chains of dielectric microspheres assembled directly inside the cores of hollow waveguides is studied by using numerical ray tracing. The device designs are optimized for laser surgery in contact mode with strongly absorbing tissue. By analyzing a broad range of parameters it is demonstrated that chains formed by three or five spheres with a refractive index of 1.65-1.75 provide a two-fold improvement in spatial resolution over single spheres at the cost of 0.2-0.4 attenuation in peak intensity of the central focused beam. Potential applications include ultra precise laser ablation or coagulation in the eye and brain, cellular surgery, and the coupling of light into photonic nanostructures.

Full Text

Duke Authors

Cited Authors

  • Darafsheh, A; Fardad, A; Fried, NM; Antoszyk, AN; Ying, HS; Astratov, VN

Published Date

  • February 14, 2011

Published In

Volume / Issue

  • 19 / 4

Start / End Page

  • 3440 - 3448

PubMed ID

  • 21369166

Pubmed Central ID

  • PMC3368307

Electronic International Standard Serial Number (EISSN)

  • 1094-4087

Digital Object Identifier (DOI)

  • 10.1364/OE.19.003440


  • eng

Conference Location

  • United States