Electrical spectroscopy of polaritonic nanoresonators

Area of Science:

• Condensed Matter Physics
• Nanophotonics
• Materials Science

Background:

• Polaritons confine light at the nanoscale, especially in 2D materials.
• Current detection methods rely on external photodetectors, limiting applications.
• Electrical detection of 2D polaritons via far-field excitation is an underexplored area.

Purpose of the Study:

• To present the electrical spectroscopy of polaritonic nanoresonators.
• To enable spectrally resolved electrical detection of 2D polaritons.
• To explore the potential for integration with silicon technologies for sensing and imaging.

Main Methods:

• Fabrication of polaritonic nanoresonators using high-quality 2D-material heterostructures.
• Using the heterostructure as both the photodetector and polaritonic platform.
• Electrical detection via near-field coupling to a graphene pn-junction for mid-infrared resonators.

Main Results:

• Demonstrated electrical spectroscopy of 2D polaritonic nanoresonators.
• Achieved extreme lateral confinement and high-quality factors in the nanoresonators.
• Successfully electrically detected mid-infrared resonators coupled to a graphene pn-junction.

Conclusions:

• This work establishes a method for electrical detection of 2D polaritons.
• The developed system offers tunable properties for hybrid systems.
• Paves the way for compact sensing and imaging platforms based on 2D polaritons.