Related Experiment Video
Updated: Jul 30, 2026
11:42
Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
Published on: July 24, 2015
15.4K
Infrared single-photon detection with superconducting magic-angle twisted bilayer graphene
Giorgio Di Battista1, Kin Chung Fong2,3, Andrés Díez-Carlón1
1Fakultät für Physik, Ludwig-Maximilians-Universität, Schellingstrasse 4, München 80799, Germany.
Science Advances
|September 18, 2024
Summary
Magic-angle twisted bilayer graphene (MATBG) is a novel superconductor with ultralow carrier density. This unique material demonstrates exceptional sensitivity for detecting single near-infrared photons, paving the way for advanced quantum sensors.
Area of Science:
- Condensed Matter Physics
- Quantum Technologies
Background:
- Magic-angle twisted bilayer graphene (MATBG) exhibits unique superconducting properties.
- Its ultralow carrier density (~10^11 cm^-2) leads to low heat capacity and high kinetic inductance.
- These properties are promising for advanced quantum sensing applications.
Purpose of the Study:
- To demonstrate the potential of MATBG for single near-infrared photon detection.
- To investigate the interaction between MATBG and photons.
Main Methods:
- Fabrication of a MATBG device.
- Voltage biasing the device near its superconducting phase transition.
- Irradiating the device with single near-infrared photons.
Main Results:
- Complete destruction of the superconducting state was observed upon single photon absorption.
- Exceptional sensitivity was demonstrated even in a 16-square micrometer device.
- Insights into MATBG-photon interactions were gained.
Conclusions:
- MATBG is a highly sensitive platform for single-photon detection.
- Moiré superconductors offer a promising route for developing revolutionary quantum devices and sensors.
