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Optics Letters

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  • Vol. 28, Iss. 17 — Sep. 1, 2003
  • pp: 1588–1590

High-speed femtosecond pump probe spectroscopy with a smart pixel detector array

S. Bourquin, R. P. Prasankumar, F. X. Kärtner, J. G. Fujimoto, T. Lasser, and R. P. Salathé  »View Author Affiliations


Optics Letters, Vol. 28, Issue 17, pp. 1588-1590 (2003)
http://dx.doi.org/10.1364/OL.28.001588


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Abstract

A new femtosecond pump–probe spectroscopy technique is demonstrated that permits the high-speed, parallel acquisition of pump–probe measurements at multiple wavelengths. This is made possible by use of a novel, two-dimensional smart pixel detector array that performs amplitude demodulation in real time on each pixel. This detector array can not only achieve sensitivities comparable with lock-in amplification but also simultaneously performs demodulation of probe transmission signals at multiple wavelengths, thus permitting rapid time- and wavelength-resolved femtosecond pump–probe spectroscopy. Measurements on a thin sample of bulk GaAs are performed across 58 simultaneous wavelengths. Differential probe transmission changes as small as ~2×10-4 can be measured over a 5-ps delay scan in only ~3 min . This technology can be applied to a wide range of pump–probe measurements in condensed matter, chemistry, and biology.

© 2003 Optical Society of America

OCIS Codes
(040.1240) Detectors : Arrays
(320.0320) Ultrafast optics : Ultrafast optics

Citation
S. Bourquin, R. P. Prasankumar, F. X. Kärtner, J. G. Fujimoto, T. Lasser, and R. P. Salathé, "High-speed femtosecond pump probe spectroscopy with a smart pixel detector array," Opt. Lett. 28, 1588-1590 (2003)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-28-17-1588


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References

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