Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: K1.00020 : Phase cycling for optical two-dimensional Fourier-transform spectroscopy
Author:
Phase-cycling has been implemented in optical two-dimensional
Fourier-transform spectroscopy to extract signals from quantum
wells and
quantum dots and to eliminate noise such as pump scatter
co-propagating with
the four-wave mixing signal. Experiments using actively
phase-stabilized
interferometers to cycle the excitation pulse optical phases
suffer from
partial noise cancellation because excitation and phase-control
laser
wavelengths are incommensurate. To obtain full noise elimination,
we have
incorporated liquid crystal variable retarders capable of
imposing a $\pi $
phase shift for wavelengths 650-950 nm. We present non-rephasing
spectra of
potassium vapor contained in a $\sim $20 $\mu $m transmission
cell and show
that this phase cycling method removes all noise from pump
scatter while
drastically reducing the data acquisition time compared to
mechanical
phase-delay techniques.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.K1.20
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