Ultrafast pump-probe nanoscale spatial and spectral characterization of polaritonic, semiconductor and phase-change media
Abstract
Ultrafast pump-probe nanoscale spatial and spectral characterization of polaritonic, semiconductor and phase-change media. PI-Caldwell requests support for a custom, ultrafast, pump-probe nano-FTIR system that will form the basis for pump-probe experiments to directly measure the spectral response of optical nanomaterials from the short- (SWIR) to long-wave infrared (LWIR) at timescales ranging from 100 fs to 500 ps. By combining an ultrafast, broad-band mid- to long-wave broadband IR laser (4.6-15.4 ?m wavelength) realized from difference frequency generation between the 1.54-1.58 and 1.73-2.25 ?m tunable laser sources with the existing Neaspec neaSNOM system within the Caldwell lab, FTIR spectra can be collected from spatial regions that are smaller than 20 nm. This is on the order of 1000x smaller than the incident wavelength of light probing this region of interest.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 08, 2020
- Source ID
- N000142012486
Entities
People
- Joshua Caldwell
Organizations
- Office of Naval Research
- United States Navy
- Vanderbilt University