Mechanical constraint helps locate quantum light sources

New optoelectronic components like single-photon sources leverage semiconducting quantum dots integrated into a photonic structure. The sources are generally randomly distributed across a surface within the structure. Knowing the sources’ positions, however, is important to understanding and improving component performance.
Researchers at INAC and Institut Néel developed a novel technique to map the sources. They introduced oscillation into the photonic structure to generate a very irregular mechanical constraint that causes a shift in the spectrum of light emitted by each quantum dot. Optical spectroscopy can then be used to measure the difference between the sources and determine the position of each source to within a nanometer.

Contacts: julien.claudon@cea.fr – jean-philippe.poizat@neel.cnrs.fr

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