Opportunity at National Institute of Standards and Technology (NIST)
Time-Resolved Frequency Comb Spectroscopy
Material Measurement Laboratory, Chemical Sciences Division
Please note: This Agency only participates in the February and August reviews.
|Adam J Fleisher
|Joseph Terence Hodges
|David A Long
Optical frequency combs helped define a new era of precision molecular spectroscopy. We currently use optical combs as both metrology tools, as well as for direct molecular spectroscopy. As a metrology tool, combs act as absolute optical frequency references to which continuous-wave lasers can be compared and phase-locked. When used to perform direct comb spectroscopy, broadband spectra can be retrieved at 100 kHz acquisition rates, and therefore transient and time-resolved phenomena can be examined with high precision. Opportunities currently exist to perform comb-assisted and/or direct comb spectroscopy in the near- and/or mid-infrared. Potential applications include time-resolved chemical kinetics of atmospherically relevant free radicals, the trace detection of radiocarbon dioxide (14CO2), and the precision validation of advanced lineshape models and other reference data.
Fleisher AJ, et al: “Mid-infrared time-resolved frequency comb spectroscopy of transient free radicals.” Journal of Physical Chemistry Letters 5: 2241-2246, 2014
Long DA, et al: “Multiheterodyne spectroscopy with optical frequency combs generated from a continuous wave laser.” Optics Letters 39: 2688-2690, 2014
Frequency combs; Spectroscopy; Phase stabilization; Chemical kinetics; Ultrafast; Optical cavities; Fiber optics; Electro-optic modulators; Lasers;
Open to U.S. citizens
Open to Postdoctoral applicants