Affiliation:
1. The University of Tokyo
2. The Institute for Solid-State Physics, The University of Tokyo
Abstract
We have newly developed, to the best of our knowledge, a detection
method for broadband infrared pulses based on sum-frequency generation
spectroscopy in reflection geometry, which can avoid a restriction of
the detection bandwidth originating from the phase mismatch that is
inevitable for the upconversion in transmission geometry. Using a GaAs
crystal, we successfully demonstrated the ultra-broadband detection of
the infrared pulses generated from a two-color laser-induced air
plasma filament in a region from 300 to 3300 cm−1. With the
advantage of ultra-short infrared pulses, the present detection method
holds promise for application to time-resolved, ultra-broadband
vibrational spectroscopy.
Funder
Japan Society for the Promotion of
Science
Core Research for Evolutional Science and
Technology
Sumitomo Foundation
Research Foundation for Opto-Science and
Technology
FoPM, WINGS Program
Attosecond lasers for next frontiers in
science and technology