Rotational excitation and orientation of a polar molecule is studied in presence of pulse train o... more Rotational excitation and orientation of a polar molecule is studied in presence of pulse train of different shape envelopes. Both rotational excitation and orientation show strong dependence on shape of the pulse train. Rotational dynamics and orientation show strong dependence on the shape of the pulse train. g r a p h i c a l a b s t r a c t The figure shows the effect of thirteen pulse train (Gaussian shape) on the population dynamics of ground and excited rotational states of HBr molecule. Inset shows the orientation of the molecule due to single pulse. a b s t r a c t We investigate theoretically the rotational excitation and field free molecular orientation of polar HBr molecule, interacting with train of ultrashort laser pulses. By adjusting the number of pulses, pulse period and the intensity of the pulse, one can suppress a population while simultaneously enhancing the desired population in particular rotational state. We have used train of laser pulses of different shaped pulse envelopes. The dynamics and orientation of molecules in the presence of pulse train of different shapes is studied and explained.
We investigate the effects of delayed infrared laser (IRL) pulse shape on the non-adiabatic rotat... more We investigate the effects of delayed infrared laser (IRL) pulse shape on the non-adiabatic rotational excitation and alignment of a polar molecule. We suggest a control scheme for choosing populations of molecular rotational states by wave packet interference. The rotational wave packets of polar molecule (here HBr) excited non-adiabatically by orienting pulse is controlled actually using the second delayed IRL pulse. By adjusting the time delay between the two laser pulses and the shape of delayed IRL pulse, constructive or destructive interference among these wave packets enables the population to be enhanced or repressed for the specific rotational state. We have used fourth order Runge–Kutta method to study the non-adiabatic rotational excitation (NAREX) dynamics.
Rotational excitation and orientation of a polar molecule is studied in presence of pulse train o... more Rotational excitation and orientation of a polar molecule is studied in presence of pulse train of different shape envelopes. Both rotational excitation and orientation show strong dependence on shape of the pulse train. Rotational dynamics and orientation show strong dependence on the shape of the pulse train. g r a p h i c a l a b s t r a c t The figure shows the effect of thirteen pulse train (Gaussian shape) on the population dynamics of ground and excited rotational states of HBr molecule. Inset shows the orientation of the molecule due to single pulse. a b s t r a c t We investigate theoretically the rotational excitation and field free molecular orientation of polar HBr molecule, interacting with train of ultrashort laser pulses. By adjusting the number of pulses, pulse period and the intensity of the pulse, one can suppress a population while simultaneously enhancing the desired population in particular rotational state. We have used train of laser pulses of different shaped pulse envelopes. The dynamics and orientation of molecules in the presence of pulse train of different shapes is studied and explained.
We investigate the effects of delayed infrared laser (IRL) pulse shape on the non-adiabatic rotat... more We investigate the effects of delayed infrared laser (IRL) pulse shape on the non-adiabatic rotational excitation and alignment of a polar molecule. We suggest a control scheme for choosing populations of molecular rotational states by wave packet interference. The rotational wave packets of polar molecule (here HBr) excited non-adiabatically by orienting pulse is controlled actually using the second delayed IRL pulse. By adjusting the time delay between the two laser pulses and the shape of delayed IRL pulse, constructive or destructive interference among these wave packets enables the population to be enhanced or repressed for the specific rotational state. We have used fourth order Runge–Kutta method to study the non-adiabatic rotational excitation (NAREX) dynamics.
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Papers by Ashish Tyagi
and alignment of a polar molecule. We suggest a control scheme for choosing populations of
molecular rotational states by wave packet interference. The rotational wave packets of polar molecule
(here HBr) excited non-adiabatically by orienting pulse is controlled actually using the second delayed
IRL pulse. By adjusting the time delay between the two laser pulses and the shape of delayed IRL pulse,
constructive or destructive interference among these wave packets enables the population to be
enhanced or repressed for the specific rotational state. We have used fourth order Runge–Kutta method
to study the non-adiabatic rotational excitation (NAREX) dynamics.
and alignment of a polar molecule. We suggest a control scheme for choosing populations of
molecular rotational states by wave packet interference. The rotational wave packets of polar molecule
(here HBr) excited non-adiabatically by orienting pulse is controlled actually using the second delayed
IRL pulse. By adjusting the time delay between the two laser pulses and the shape of delayed IRL pulse,
constructive or destructive interference among these wave packets enables the population to be
enhanced or repressed for the specific rotational state. We have used fourth order Runge–Kutta method
to study the non-adiabatic rotational excitation (NAREX) dynamics.