Opportunity at National Institute of Standards and Technology (NIST)
Ultrafast Optics and Physics
Physical Measurement Laboratory, Quantum Physics Division
Please note: This Agency only participates in the February and August reviews.
Ultrashort pulses provide high time resolution and high peak powers. Both aspects are utilized in ultrafast physics. The coherent interaction of ultrashort light pulses with optically dense material reveals the presence of many-body effects. We are exploiting this in direct gap semiconductors, where many-body effects dominate the optical response. Specifically, we use the technique of optical two-dimensional Fourier-transform spectroscopy to study coupling of optical transitions in nanostructures. We are also studying dense atomic vapors, where evidence for non-Markovian dynamics is observed. The high peak power afforded by these pulses is being used to perform nonlinear spectroscopy on correlated electron materials, including high-temperature superconductors and mixed valence materials.
We are also working on new types of mode-locked lasers, which generate trains of ultrashort pulses, and technqiues for shaping ultrafast optical pulse at the ultimate limits of time and frequency resolution.
Ultrafast optical spectroscopy; Two-dimensional Fourier-transform spectroscopy; Semiconductors; Excitons; Mode-locking; Optical arbitrary waveform generation;
Open to U.S. citizens
Open to Postdoctoral applicants