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Theory of Rotational Orientation of Molecular Chromophores by Circularly Polarized Optical Pumping
Date
2012Type
ThesisDepartment
Chemistry
Degree Level
Honors Thesis
Degree Name
Chemistry
Abstract
The feasibility of creating unidirectional rotational motion of molecular or
nanoscale symmetric top rotors by absorption of circularly polarized light
was theoretically investigated using a stochastic Monte Carlo type simulation
method. The degree of rotational orientation possible was studied
as a function of the shape of the rotor chromosphere, the internal location
of its transition dipole, and the probability of collisional thermalization of
rotation. The polarized
uorescence from the resulting rotational alignment
is simulated to explore its utility as an experimental probe of the
optical pumping process. The simulations show that all shapes of symmetric
top rotors achieve a high degree of rotational alignment for su ciently
low collision probability. In selecting molecules for experimental study of
this e ect, the transition type is important in optimizing the
uorescence
anisotropy.
Permanent link
http://hdl.handle.net/11714/552Additional Information
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