Infrared Adiabatic Rapid Passage Spectroscopy of Small Gas Phase Molecules
EMSL Project ID
23596
Abstract
Adiabatic rapid passage and superradiance spectroscopies using quantum cascade lasers are optical techniques that hold the promise of ultratrace detection of molecules in atmospheric grab samples. Under a previous EMSL proposal (#3351) we have recorded a large quantity of data testing these techniques and have drawn a number of qualitative conclusions about the data. Now we are prepared to quantitatively model the propagation of the 30 mW infrared (1915 cm-1) laser beam through several meters of pathlength of 1 mTorr nitric oxide. Computer code has been written that calculates the real and imaginary susceptibility of the gas as a function of laser ramp rate, pathlength, laser detuning, Rabi rate of the quantum levels, gas density, and Doppler spacing. We are requesting time on an EMSL computer to run these codes and help in optimizing the code.
Project Details
Project type
Exploratory Research
Start Date
2007-01-05
End Date
2008-01-06
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members