Longitudinal localization of a fluorescent bead in a tunable microcavity with an accuracy of λ/60
Optics Letters, Vol. 34, Issue 5, pp. 629-631 (2009)
http://dx.doi.org/10.1364/OL.34.000629
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Abstract
The exact localization of a quantum emitter in a transparent dielectric medium is an important task in applications of precision confocal microscopy. Therefore we use a planar metallic subwavelength microcavity that can be reversibly tuned across the entire visible range, with the transparent medium between the cavity mirrors. By analyzing the excitation patterns resulting from the illumination of a single fluorescent bead with a radially polarized doughnut mode laser beam we can determine the longitudinal position of this bead in the microcavity with an accuracy of a few nanometers.
© 2009 Optical Society of America
OCIS Codes
(180.1790) Microscopy : Confocal microscopy
(180.2520) Microscopy : Fluorescence microscopy
(140.3945) Lasers and laser optics : Microcavities
ToC Category:
Microscopy
History
Original Manuscript: December 18, 2008
Manuscript Accepted: January 10, 2009
Published: February 24, 2009
Citation
Raphael Gutbrod, Alexey Chizhik, Anna Chizhik, Dmitry Khoptyar, and Alfred J. Meixner, "Longitudinal localization of a fluorescent bead in a tunable microcavity with an accuracy of λ/60," Opt. Lett. 34, 629-631 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-5-629
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