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Related Experiment Video

Updated: Nov 20, 2025

Fluorescence Imaging with One-nanometer Accuracy FIONA

Fluorescence Imaging with One-nanometer Accuracy FIONA

Published on: September 26, 2014

The multi-photon induced Fano effect.

K L Litvinenko¹, Nguyen H Le², B Redlich³

¹Department of Physics, Advanced Technology Institute, University of Surrey, Guildford, GU2 7XH, UK. k.litvinenko@surrey.ac.uk.

Nature Communications

|January 20, 2021

Summary

This summary is machine-generated.

Researchers demonstrate a new way to induce Fano structure in atoms using lasers, without needing auto-ionization. This laser-controlled interference allows for state-selective detection and potential applications in quantum computing.

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Area of Science:

Atomic Physics
Quantum Optics
Condensed Matter Physics

Background:

The Fano effect typically requires autoionizing states for photo-ionization interference.
Existing methods rely on complex many-electron atomic systems.

Purpose of the Study:

To demonstrate Fano structure induction without auto-ionization.
To achieve ultra-fast control over Fano interference using lasers.
To explore applications in atomic spectroscopy and quantum information.

Main Methods:

Dressing a continuum with a bound state using a coupling laser.
Employing multi-photon processes for interference control.
Calculating Fano line-shape index (q) for silicon donors.

Main Results:

Fano structure induced without auto-ionization.
Achieved near-unity line-shape index (q) with a weak laser beam.
Demonstrated state-selective detection with enhanced and suppressed signals.

Conclusions:

Laser-induced Fano effect offers a new pathway for atomic spectroscopy.
Potential for precise control in quantum systems, such as qubit readout in silicon donors.