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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 18 — Aug. 27, 2012
  • pp: 20011–20020

Frequency-domain optical probing of coherent spins in nanocrystal quantum dots

J. A. Frey and J. Berezovsky  »View Author Affiliations


Optics Express, Vol. 20, Issue 18, pp. 20011-20020 (2012)
http://dx.doi.org/10.1364/OE.20.020011


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Abstract

Spin-photon interactions such as the Faraday effect provide techniques for measuring coherent spin dynamics in semiconductors. In contrast to typical ultrafast pulsed laser techniques, which measure spin dynamics in the time domain with an intense, spectrally broad probe pulse, we demonstrate a frequency-domain spin-photon resonance effect using modulated continuous-wave lasers which enables measurement of GHz-scale coherent spin dynamics in semiconductors with minimal spectral linewidth. This technique permits high-resolution spectroscopic measurements not possible with ultrafast methods. We have employed this effect to observe coherent spin dynamics in CdSe nanocrystals using standard diode lasers. By fitting the results to the expected model, we extract electron g-factors, and spin coherence and dephasing times in agreement with time-domain measurements.

© 2012 OSA

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(230.2240) Optical devices : Faraday effect
(300.6300) Spectroscopy : Spectroscopy, Fourier transforms

ToC Category:
Spectroscopy

History
Original Manuscript: June 26, 2012
Revised Manuscript: July 13, 2012
Manuscript Accepted: August 12, 2012
Published: August 16, 2012

Citation
J. A. Frey and J. Berezovsky, "Frequency-domain optical probing of coherent spins in nanocrystal quantum dots," Opt. Express 20, 20011-20020 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-18-20011


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References

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