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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

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Quantum Calligraphy: Writing Single-Photon Emitters in a Two-Dimensional Materials Platform.

Matthew R Rosenberger¹, Chandriker Kavir Dass^2,3, Hsun-Jen Chuang¹

¹Materials Science & Technology Division , Naval Research Laboratory , Washington , D.C. 20375 , United States.

|January 5, 2019

Summary

We developed a method to precisely place single-photon emitters in 2D materials using strain. This technique allows for the creation of custom quantum light sources at the nanoscale, operating at higher temperatures.

Keywords:

atomic force microscopy single-photon emitter strain engineering tungsten diselenide two-dimensional materials

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Area of Science:

Materials Science
Quantum Optics
Nanotechnology

Background:

Two-dimensional materials (2DMs) offer unique optical and electronic properties.
Precise control over quantum emitters in 2DMs is crucial for quantum technologies.
Existing methods for creating single-photon emitters (SPEs) often lack spatial control.

Purpose of the Study:

To present a novel paradigm for encoding strain into 2DMs.
To deterministically create and place SPEs at arbitrary locations with nanometer precision.
To enable the design of custom patterns of SPEs for integrated quantum devices.

Main Methods:

Fabrication of a 2DM/polymer composite platform.
Application of localized mechanical stress using an atomic force microscope (AFM) tip.
Characterization of strain fields and resulting SPEs.

Main Results:

Highly localized and repeatable strain fields were generated in 2DMs.
SPEs were created and localized at these strain-induced nanoindents.
Single-photon emission was observed up to 60 K, a record for these materials.
Demonstrated "quantum calligraphy" for arbitrary SPE pattern design.

Conclusions:

The developed method allows for precise, deterministic placement of SPEs in 2DMs.
This technique facilitates facile coupling with photonic structures.
Presents a general methodology for strain engineering in 2DMs for advanced quantum applications.