Characterization of disorder in semiconductors via single-photon interferometry

Area of Science:

• Optics and Photonics
• Materials Science
• Condensed Matter Physics

Background:

• Semiconductor nanostructures are crucial for modern electronics and photonics.
• Characterizing disorder in these materials is essential for optimizing device performance.
• Existing methods for disorder characterization can be complex or indirect.

Purpose of the Study:

• To introduce a novel, purely optical experimental method for quantifying disorder in semiconductor nanostructures.
• To provide a direct link between optical measurements and the spatial distribution of electronic states.
• To establish a new tool for the characterization of nanoscale material properties.

Main Methods:

• Derivation of a theoretical expression for angular photonic correlations of spontaneous emission.
• Numerical evaluation of the derived expression using a model semiconductor nanostructure.
• Proposal of an experimental scheme based on measuring light emission patterns.

Main Results:

• The theoretical model successfully predicts measurable angular correlations.
• The angular correlations directly correlate with the degree and spatial nature of disorder.
• The method demonstrates sensitivity to the distribution of localized states within the nanostructure.

Conclusions:

• Angular photonic correlations offer a powerful and direct optical probe for semiconductor nanostructure disorder.
• This method provides valuable information on the spatial characteristics of electronic states, crucial for material design.
• The proposed technique has the potential to become a standard tool in nanostructure characterization.