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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 4 — Feb. 14, 2011
  • pp: 3440–3448

Contact focusing multimodal microprobes for ultraprecise laser tissue surgery

Arash Darafsheh, Amir Fardad, Nathaniel M. Fried, Andrew N. Antoszyk, Howard S. Ying, and Vasily N. Astratov  »View Author Affiliations


Optics Express, Vol. 19, Issue 4, pp. 3440-3448 (2011)
http://dx.doi.org/10.1364/OE.19.003440


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Abstract

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.

© 2011 OSA

OCIS Codes
(170.3890) Medical optics and biotechnology : Medical optics instrumentation
(170.4460) Medical optics and biotechnology : Ophthalmic optics and devices
(220.2740) Optical design and fabrication : Geometric optical design
(230.3990) Optical devices : Micro-optical devices

ToC Category:
Medical Optics and Biotechnology

History
Original Manuscript: January 4, 2011
Revised Manuscript: January 31, 2011
Manuscript Accepted: January 31, 2011
Published: February 7, 2011

Virtual Issues
Vol. 6, Iss. 3 Virtual Journal for Biomedical Optics

Citation
Arash Darafsheh, Amir Fardad, Nathaniel M. Fried, Andrew N. Antoszyk, Howard S. Ying, and Vasily N. Astratov, "Contact focusing multimodal microprobes for ultraprecise laser tissue surgery," Opt. Express 19, 3440-3448 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-4-3440


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