Access

You are not currently logged in.

Access JSTOR through your library or other institution:

login

Log in through your institution.

Journal Article

Analysis of all-optical switching in bacteriorhodopsin

Sukhdev Roy, C. P. Singh and K. P. J. Reddy
Current Science
Vol. 83, No. 5 (10 September 2002), pp. 623-627
Stable URL: http://www.jstor.org/stable/24107136
Page Count: 5
Were these topics helpful?
See something inaccurate? Let us know!

Select the topics that are inaccurate.

  • More info
  • Add to My Lists
  • Cite this Item
Preview not available
Preview not available

Abstract

All-optical switching has been demonstrated in bacteriorhodopsin (bR) based on nonlinear, intensity-induced excited state absorption. The transmission of a cw probe laser beam at 640 nm corresponding to the peak absorption of O-state through a bR film, is switched by a pulsed pump laser beam at 570 nm that corresponds to the maximum initial B-state absorption. The switching characteristics have been analysed using the rate equation approach and the six intermediate states in the bR photocycle. The effect of various parameters such as pump pulse width and intensity, rate constants of M and O states and absorption cross-section of the B-state at probe wavelength on switching, have been analysed in detail. It has been shown that the probe laser beam can be completely switched off by the pump laser beam at relatively low pump powers, if the B-state does not absorb the probe beam.

Page Thumbnails

  • Thumbnail: Page 
623
    623
  • Thumbnail: Page 
624
    624
  • Thumbnail: Page 
625
    625
  • Thumbnail: Page 
626
    626
  • Thumbnail: Page 
627
    627
Part of Sustainability