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Speeding Up Ultrafast Spectroscopy
February 15, 2021•
Physics 14, 23
A signal-processing algorithm called compressive sensing lets researchers characterize a sample with ultrafast spectroscopy using far fewer measurements than before. 
J.-M. Ménard/University of Ottawa; adapted by APS/Alan Stonebraker
Figure 1: Schematic application of compressive sensing to THz time-domain spectroscopy. (Top left) A terahertz pulse is incident on a sample. (Top right) The pulse is shown after traveling through the sample with a trailing oscillatory tail indicating the presence of molecular resonances. (Bottom) The resulting signal is composed of three different peaks, giving a sparse frequency-domain representation.Schematic application of compressive sensing to THz time-domain spectroscopy. (Top left) A terahertz pulse is incident on a sample. (Top right) The pulse is shown after traveling through the sample with a trailing oscillatory tail indicating the pres. Sho ....

United States , Rachel Ostic , Sushovit Adhikari , Centre For Extreme Photonics , University Of Toronto , Max Planck Uottawa Centre For , University Of Regensburg , Department Of Physics , Argonne National Laboratory , University Of Ottawa , Alan Stonebraker , Assistant Professor , Max Planck Institute , Humboldt Fellow , Joint Centre , Extreme Photonics , Max Planck Uottawa Centre , ஒன்றுபட்டது மாநிலங்களில் , மையம் க்கு தீவிர ஃபோட்டானிக்ஸ் , பல்கலைக்கழகம் ஆஃப் டொராண்டோ , துறை ஆஃப் இயற்பியல் , ஆர்கோன் தேசிய ஆய்வகம் , பல்கலைக்கழகம் ஆஃப் ஆடவா , ஆலன் ஸ்தோந்ெபிரகேற் , உதவியாளர் ப்ரொஃபெஸர் , ஹம்போல்ட் சக ,