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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 12 — Jun. 4, 2012
  • pp: 12710–12720

Switching photochromic molecules adsorbed on optical microfibres

U. Wiedemann, W. Alt, and D. Meschede  »View Author Affiliations

Optics Express, Vol. 20, Issue 12, pp. 12710-12720 (2012)

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The internal state of organic photochromic spiropyran molecules adsorbed on optical microfibres is optically controlled and measured by state-dependent light absorption. Repeated switching between the states is achieved by exposure to the evanescent field of a few nanowatts of light guided in the microfibre. By adjusting the microfibre evanescent field strength the dynamic equilibrium state of the molecules is controlled. Time-resolved photoswitching dynamics are measured and modelled with a rate equation model. We also study how many times the photochromic system can be switched before undergoing significant photochemical degradation.

© 2012 OSA

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(260.5130) Physical optics : Photochemistry
(300.6390) Spectroscopy : Spectroscopy, molecular
(160.5335) Materials : Photosensitive materials

ToC Category:

Original Manuscript: March 29, 2012
Revised Manuscript: May 16, 2012
Manuscript Accepted: May 16, 2012
Published: May 21, 2012

U. Wiedemann, W. Alt, and D. Meschede, "Switching photochromic molecules adsorbed on optical microfibres," Opt. Express 20, 12710-12720 (2012)

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