Thrust 3: Novel linear and nonlinear spectroscopies
Top photograph of graduate student Scott Heinbuch and undergraduate Jutin Lo of Colorado State University, working with the new nanocluster spectroscopy apparatus. The compact capillary discharge EUV laser photoionization source can be seen on the lower right of the photograph.
The EUV region of the spectrum is used
by thousands of scientists for element-specific and surface-specific
spectroscopies. New, small-scale, EUV sources will make
it possible to implement many techniques currently done
at large-scale facilities in individual research labs. Furthermore,
given the short-pulse nature of these EUV sources (femtosecond
for the HHG sources), new opportunities will arise for extending
techniques such as photoelectron spectroscopy into the time
domain, and for exploring nonlinear-optical properties of
matter in a new region of the spectrum.
We are constructing testbeds that will use the compact EUV
sources developed at the Center to study challenging scientific
problems. In the longer-term, our strategic plan is to develop
small-scale analytical instruments for a wide range of applications.
In the initial year of the EUV ERC, we are working to implement
the following testbed systems to demonstrate the utility
of small-scale EUV sources.
Recent Results
- Demonstration of EUV photoacoustic metrology.
- Demonstration of two-photon EUV/visible photoelectron emission from surfaces.
- EUV laser ionization spectroscopy of metal-oxide nanoclusters.
- HHG probing of atomic motion within a molecule.
Projects
- Femtosecond EUV Nonlinear Spectroscopy Testbed.
- Femtosecond Transient EUV Absorption Spectroscopy.
- Time-Resolved Surface Photoelectron Spectroscopy Testbed.
- Molecular Dynamics Probed Using EUV High-order Harmonic Generation: (pictured below)
- Other Nonlinear Spectroscopy Testbeds under Development.
- Photoemission Experiments of Novel Electronic Solids.
- Spectroscopy of Nanoclusters Using a Desktop EUV Laser.