Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

David Long

Dr. David A. Long is a research chemist in the Material Measurement Laboratory at the National Institute of Standards and Technology (NIST) in Gaithersburg, MD. His research applies cutting-edge spectroscopic techniques to present problems in optical metrology, instrumental development, and atmospheric science. He is actively working on optical frequency comb development and applications in direct frequency comb spectroscopy as well as the development of ultrasensitive, frequency-agile spectroscopic approaches. Other areas of interest include molecular and atomic spectroscopy, cavity optomechanics, and remote sensing.

Research Interests

  • Molecular spectroscopy
  • Instrument development
  • Cavity-enhanced techniques
  • Optical frequency combs
  • Remote sensing
  • Greenhouse gas monitoring
  • Atmospheric chemistry


  • National Science Foundation Graduate Fellowship (2007)
  • National Defense Science and Engineering Fellowship (2007)
  • USA Today All-College Team Honorable Mention (2007)
  • Finalist for the Rhodes and Marshall Fellowships (2007)
  • Graduated as valedictorian and summa cum laude from Kenyon College (2007)
  • Morris K. Udall Scholarship (2006)
  • Barry M. Goldwater Scholarship (2005)

Full List of Publications


Broadband Optomechanical Sensing at the Thermodynamic Limit

Feng Zhou, Yiliang Bao, Ramgopal Madugani, David A. Long, Jason J. Gorman, Thomas W. LeBrun
Cavity optomechanics has enabled precision measurements with unprecedented levels of sensitivity, including the detection of attonewton forces, nanoparticles
Created September 10, 2019