Frequency Comb Spectroscopy on Novel Structure
Abstract
Under AFOSR support, we have recently made major strides in pushing the frontiers of frequency comb based coherent light matter interactions. Key achievements include the first demonstration of phase matched extreme ultraviolet high harmonic generation at high repetition rate, resulting in a record average power of 2 mW in a single harmonic order for XUV frequency combs. Using mid IR frequency combs, we have developed an unprecedented capability for tracking real time chemical reaction kinetics, obtaining for the first time quantitative and detailed understanding of the OH+CO reaction kinetics. We made direct observations of trans DOCO and cis DOCO from OD+CO at thermal reaction conditions, together with measurements of D+CO2 products, a complete understanding of this multistep reaction has been established. Furthermore, we have developed optical frequency combs that operate in the 6 to 10 µm spectral region, promising many new discoveries in molecular science. In fact, we recently achieved an outstanding milestone in the field of molecular spectroscopy – we observed quantum state resolved transitions in C60 molecules for the first time. In the context of these exciting new developments, we foresee important scientific explorations in the next few years. Optical frequency combs offer enormous potential in the detection and control of atoms and molecules by combining high sensitivity, precise frequency control, broad spectral coverage, and high resolution in a single experimental platform. In the mid IR region, we will use frequency comb spectroscopy to explore quantum state entanglement in molecular structure and dynamics and we aim to uncover the connection between complex molecules such as C60 and quantum many body physics. By monitoring chemical reaction dynamics in real time, we will study an important reaction intermediate, carbonic acid (H2CO3), from the reactions H2O+CO2. ...
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 14, 2022
- Source ID
- FA95501910148
Entities
People
- Jun Ye
Organizations
- Air Force Office of Scientific Research
- Regents of the University of Colorado
- United States Air Force