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Optics Letters

Optics Letters


  • Vol. 36, Iss. 9 — May. 1, 2011
  • pp: 1665–1667

Single-shot ultrabroadband two-dimensional electronic spectroscopy of the light-harvesting complex LH2

Elad Harel, Phillip D. Long, and Gregory S. Engel  »View Author Affiliations

Optics Letters, Vol. 36, Issue 9, pp. 1665-1667 (2011)

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Here we present two-dimensional (2D) electronic spectra of the light-harvesting complex LH2 from purple bacteria using coherent pulses with bandwidth of over 100 nm FWHM. This broadband excitation and detection has allowed the simultaneous capture of both the B800 and B850 bands using a single light source. We demonstrate that one laser pulse is sufficient to capture the entire 2D electronic spectrum with a high signal-to-noise ratio. At a waiting time of 800 fs , we observe population transfer from the B800 to B850 band as manifested by a prominent cross peak. These results will enable observation of the dynamics of biological systems across both ultrafast ( < 1 ps ) and slower ( > 1 ms ) timescales simultaneously.

© 2011 Optical Society of America

OCIS Codes
(260.2160) Physical optics : Energy transfer
(300.0300) Spectroscopy : Spectroscopy
(300.2570) Spectroscopy : Four-wave mixing
(320.2250) Ultrafast optics : Femtosecond phenomena
(320.6629) Ultrafast optics : Supercontinuum generation
(260.7120) Physical optics : Ultrafast phenomena

ToC Category:
Ultrafast Optics

Original Manuscript: January 12, 2011
Revised Manuscript: March 29, 2011
Manuscript Accepted: March 30, 2011
Published: April 28, 2011

Elad Harel, Phillip D. Long, and Gregory S. Engel, "Single-shot ultrabroadband two-dimensional electronic spectroscopy of the light-harvesting complex LH2," Opt. Lett. 36, 1665-1667 (2011)

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