Karl Franzens University Graz
Graz University of Technology
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Karl Franzens University Graz | Graz University of Technology | |
Laser frequency combs for molecules A frequency comb is a broad spectrum of evenly spaced phase-coherent narrow laser lines. Initially invented for frequency metrology, such combs enable new approaches to spectroscopy over broad spectral bandwidths, of particular relevance to molecular sensing [1]. One of these approaches, dual-comb spectroscopy, enables fast and accurate measurements over broad spectral ranges. High-accuracy determination of all spectral line parameters [2] and broadband detection in light-starved conditions [3] become possible and open up new opportunities for precision spectroscopy and stringent comparisons with theories in atomic and molecular physics. Concurrently, progress towards chip-scale dual-comb spectrometers promises integrated devices for real-time sensing in analytical chemistry and biomedicine. With selected examples, I will illustrate the rapidly advancing field of dual-comb spectroscopy. |