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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 14 — Jul. 15, 2014
  • pp: 4219–4222

Resolution improvement in laser diode-based pump–probe microscopy with an annular pupil filter

Jun Miyazaki, Koshi Kawasumi, and Takayoshi Kobayashi  »View Author Affiliations

Optics Letters, Vol. 39, Issue 14, pp. 4219-4222 (2014)

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We experimentally demonstrate the use of annular beams to improve lateral resolution in laser-diode-based pump–probe microscopy. We found that the width of the point-spreading function in the case of the annular pump–probe beams is 162 nm, which is 30% smaller than that of the circular beams (232 nm). Furthermore, side lobes were efficiently suppressed at the focal plane since the pump–probe signal is proportional to the product of the two beam intensities. This scheme is demonstrated for the photothermal signal of nonfluorescent gold nanoparticles and the stimulated emission signal of fluorescence beads.

© 2014 Optical Society of America

OCIS Codes
(100.6640) Image processing : Superresolution
(140.2020) Lasers and laser optics : Diode lasers
(180.0180) Microscopy : Microscopy

ToC Category:

Original Manuscript: April 2, 2014
Manuscript Accepted: May 29, 2014
Published: July 11, 2014

Virtual Issues
Vol. 9, Iss. 9 Virtual Journal for Biomedical Optics

Jun Miyazaki, Koshi Kawasumi, and Takayoshi Kobayashi, "Resolution improvement in laser diode-based pump–probe microscopy with an annular pupil filter," Opt. Lett. 39, 4219-4222 (2014)

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