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Related Experiment Video

Updated: May 13, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

Electric spaser in the extreme quantum limit.

Dabing Li¹, Mark I Stockman

¹State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.

Physical Review Letters

|March 26, 2013

Summary

We theoretically demonstrate the possibility of an electrically excited spaser using nanowires. Performance is enhanced with increased conductance, showing promise for high-speed optoelectronics.

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Area of Science:

Physics
Materials Science
Nanotechnology

Background:

Spasers (Surface Plasmon Amplification by Stimulated Emission of Radiation) are nanoscale light sources.
Electrical excitation offers a compact and efficient pumping mechanism for spasers.
Nanowires with ballistic quantum conductance provide a unique platform for quantum effects in spaser operation.

Purpose of the Study:

To theoretically investigate the feasibility of an electrically excited spaser utilizing nanowires with ballistic quantum conductance.
To analyze the influence of different quantum conductance regimes on spaser performance.
To explore the potential applications of such a device in optoelectronics.

Main Methods:

Theoretical modeling of spaser operation in nanowire structures.
Analysis of quantum conductance effects in plasmonic nanowires.
Simulations considering common plasmonic metals like silver and gold.

Main Results:

Demonstrated fundamental possibility of an electrically pumped spaser using a single conductance-quantum nanowire with plasmonic metal cores (silver, gold).
Showed enhanced spaser performance for ballistic nanowires with multiple-quanta or non-quantized conductance compared to the extreme quantum limit.
Identified potential operating speeds in the range of ~100 GHz to ~100 THz.

Conclusions:

Electrically pumped spasers based on ballistic quantum conductance nanowires are theoretically viable.
Optimizing nanowire conductance can significantly enhance spaser performance.
These spasers hold promise for next-generation optical sources, nanoamplifiers, and high-speed digital logic devices in optoelectronics.