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Fabrication and Characterization of Superconducting Resonators
Published on: May 21, 2016
Two-state double-continuum Fano resonance at the Si(100) surface
Christian Eickhoff1, Martin Teichmann, Martin Weinelt
1Max-Born-Institut, Max-Born-Strasse 2A, 12489 Berlin, Germany.
Physical Review Letters
|November 24, 2011
Summary
Researchers observed complex Fano resonances in silicon, revealing a new interference pattern. This finding advances understanding of light interactions with materials for nanostructures and light-harvesting devices.
Area of Science:
- Surface science
- Quantum interference phenomena
- Solid-state physics
Background:
- Fano resonances typically describe interference between direct and indirect ionization.
- Understanding complex interference patterns is crucial for advanced material applications.
Purpose of the Study:
- To investigate a more complicated interference pattern beyond the standard Fano resonance model.
- To analyze two-photon photoemission at the Si(100) surface.
Main Methods:
- Observation of two-photon photoemission at the Si(100) surface.
- Analysis of a two-dimensional Fano profile involving two discrete surface resonances.
- Tuning photon energy across surface resonances to observe line profile changes.
Main Results:
- A complex, two-dimensional Fano profile was observed, involving two discrete surface resonances coupling to silicon bands.
- Asymmetric line profiles with destructive interference were detected in photoelectron intensities.
- An analytic extension of Fano's model successfully explained the observed interference pattern.
Conclusions:
- The study reveals a novel, complex interference pattern in two-photon photoemission at Si(100).
- The findings demonstrate the coupling of two discrete states with two continua, modifying photoabsorption.
- This research has implications for light conversion in nanostructures and light-harvesting devices.
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