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Related Experiment Video

Updated: Jun 17, 2026

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Published on: April 4, 2017

Quantum interference in NO2.

J B Hamard¹, R Cireasa, B Chatel

¹Université de Toulouse, UPS, 118 route de Narbonne, F-31062 Toulouse, France.

The Journal of Physical Chemistry. A

|January 15, 2010

Summary

This summary is machine-generated.

Quantum interference in nitrogen dioxide (NO2) dissociation was observed using ultrashort UV pulses. The study suggests a two-photon pump and two-photon probe ionization pathway involving interactions between electronic states.

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Area of Science:

Physical Chemistry
Quantum Dynamics
Molecular Spectroscopy

Background:

Nitrogen dioxide (NO2) is a molecule of interest due to its complex electronic structure and photodissociation dynamics.
Quantum interference phenomena provide insights into ultrafast molecular processes.

Purpose of the Study:

Investigate the origin of quantum interference in dissociative ionization of NO2.
Characterize the time-resolved ion signals and identify the responsible ionization pathway.

Main Methods:

Time-resolved pump-probe spectroscopy using femtosecond UV pulses.
Detection of NO+, O+, and NO2+ ions.
Varying excitation and probe wavelengths to explore multiphoton pathways.

Main Results:

Observed quantum beat oscillations (524 fs period, 8 ps damping time) in all transient ion signals.
Identified a likely two-photon pump and two-photon probe ionization pathway.
The observed dynamics suggest interaction between short-lived and longer-lived electronic states of NO2.

Conclusions:

The quantum interference signature is attributed to a complex ionization mechanism involving multiple photon absorptions.
The long damping time of the oscillations suggests coupling between different electronic states, potentially involving the B2(2) and A1(2) states of NO2.
This study highlights the intricate dynamics governing the ultrafast dissociation of NO2.