Large-scale optical characterization of solid-state quantum emitters

Area of Science:

• Quantum Information Science
• Materials Science
• Optics and Photonics

Background:

• Solid-state quantum emitters are crucial for quantum memory and networking.
• Current optical characterization methods are inefficient and not scalable.
• Need for advanced techniques to identify and utilize quantum emitters effectively.

Purpose of the Study:

• To introduce and demonstrate novel spectroscopic techniques for large-scale, automated characterization of color centers.
• To enable systematic tracking and comparison of quantum emitter sites across experiments.
• To accelerate the identification and development of quantum emitters for various applications.

Main Methods:

• Development of a machine-readable global coordinate system for precise emitter tracking.
• Implementation of widefield cryogenic microscopy with resonant photoluminescence excitation for parallel spectroscopy.
• Demonstration of automated chip-scale characterization at room temperature, covering thousands of fields of view.

Main Results:

• Achieved a two-orders-of-magnitude speed-up in resonant spectroscopy compared to confocal microscopy.
• Successfully demonstrated automated, chip-scale characterization of quantum emitters and devices.
• Established a systematic method for comparing the same quantum emitter sites over multiple experiments.

Conclusions:

• The developed spectroscopic techniques enable efficient, large-scale, and automated characterization of solid-state quantum emitters.
• These tools are vital for accelerating the discovery of high-quality quantum emitters for quantum information applications.
• The methods will significantly advance materials science, device design, and characterization in quantum technologies.