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Opportunity at National Institute of Standards and Technology (NIST)

Time-Resolved Spectroscopy for Enabling Dynamic Metrology

Location

Physical Measurement Laboratory, Sensor Science Division

RO# Location
50.68.51.B8330 Gaithersburg, MD

Please note: This Agency only participates in the February and August reviews.

Advisers

Name E-mail Phone
Douglass, Kevin O kevin.douglass@nist.gov 301.975.6489

Description

Our lab focuses on the development of novel technologies for enabling record-setting diode laser based spectroscopic measurements. The aim of this research is to develop high speed, high sensitivity spectroscopic tools to enable time-resolved measurements of rapid changes in physical quantities such as pressure, concentration, and temperature. The time scale of the dynamics ranges from a microsecond to milliseconds. The need for these tools arises because the current standards used for high precision and accuracy measurements only operate under static conditions. We are developing an approach for creating a standard for the dynamic measurement of pressure based on the measurement of fundamental quantum properties of molecular systems. From the linewidth and intensities of ro-vibrational transitions we plan on making an accurate determination of pressure and temperature. The goal is to achieve an absolute uncertainty for dynamic changes in pressure of 5% (linewidths determined to within 30 MHz) with a measurement rate of 100 kHz, which will in the future serve as a method for the traceable calibration of pressure sensors used in transient processes.

 

References

Douglass KO, et al: "Rapid scan absorption spectroscopy using a waveform-driven electro-optic phase modulator in the 1.6-1.65 μm region." Journal of the Optical Society of America B 30(10): 2696-2703, 2013

Truong GW, et al: "Frequency-agile, rapid scanning spectroscopy." Nature Photonics 7: 532-534, 2013

 

Keywords:
Spectroscopy; Sensors; High-resolution continuous wave; Quantum chemistry; Vibrational; Dynamic;

Eligibility

Citizenship:  Open to U.S. citizens
Level:  Open to Postdoctoral applicants
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