Abstract
Large terahertz electric dipole of a single graphene quantum dot
Highlights
The use of light-matter interaction has enabled recent developments of nanotechnologies
We investigate the classical response of the single Graphene quantum dots (GQDs) in the Coulomb blockade regime at low temperature using transport measurements under THz illumination at 0.11 THz
As a conclusion, using low-temperature transport measurements under coherent THz illumination we have investigated the interaction between a single GQD and a THz electric field in the classical and quantum regime
Summary
The use of light-matter interaction has enabled recent developments of nanotechnologies. The response of GQDs to THz light, which could pave the way toward the development of novel quantum THz devices, has been elusive so far. We demonstrate it using transport measurements under coherent THz illumination for a single GQD in the Coulomb blockade regime at low temperature. These findings suggest a dipole extending over most of the active part of the device. Owing to their large dipole, GQDs coupled to a THz cavity are promising for ultrastrong coupling with only one electronic transition, paving the way toward probing nonclassical light and quantum-optical experiments
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