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Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
Published on: August 6, 2018
High-order harmonic spectroscopy for molecular imaging of polyatomic molecules
M Negro1, M Devetta, D Faccialá
1Istituto di Fotonica e Nanotecnologie, CNR, 20133 Milan, Italy. caterina.vozzi@ifn.cnr.it.
High-order harmonic generation now images complex molecules like nitrous oxide and acetylene. This breakthrough advances molecular orbital tomography for studying fragile biological compounds.
Area of Science:
- * Quantum optics
- * Attosecond science
- * Molecular imaging
Background:
- * High-order harmonic generation (HHG) offers attosecond temporal and angstrom spatial resolution for probing molecular structures.
- * Previous HHG imaging was limited to simple molecules like nitrogen.
- * Molecular orbital tomography (MOT) has been extended to triatomic molecules (e.g., CO2).
Purpose of the Study:
- * To apply advanced molecular orbital tomography techniques to more complex molecules.
- * To demonstrate the imaging capabilities for nitrous oxide (N2O) and acetylene (C2H2).
- * To establish a foundation for imaging fragile, biologically relevant molecules.
Main Methods:
- * Utilizing high-order harmonic generation (HHG) as a probe.
- * Employing advanced molecular orbital tomography (MOT) techniques.
- * Analyzing the structural information obtained from N2O and C2H2 molecules.
Main Results:
- * Successful application of MOT to image nitrous oxide (N2O).
- * Successful application of MOT to image acetylene (C2H2).
- * Demonstrated feasibility of imaging complex molecular structures beyond simple diatomics.
Conclusions:
- * The developed technique successfully extends molecular imaging to N2O and C2H2.
- * This represents a significant step towards imaging fragile compounds.
- * Paves the way for structural analysis of fundamental biological molecules using HHG-based MOT.
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