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Fabrication and Operation of a Nano-Optical Conveyor Belt

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Electrostatically Tunable Near-Infrared Plasmonic Resonances in Solution-Processed Atomically Thin NbSe₂.

Meng Zhao¹, Jing Li², Matej Sebek¹

¹Institute of Materials Research and Engineering, Agency for Science, Technology and Research, Innovis, Singapore, 138634, Singapore.

Advanced Materials (Deerfield Beach, Fla.)

|June 27, 2021

Summary

Researchers achieved electrostatic control of near-infrared (NIR) plasmonics using few-layer niobium selenide (NbSe2) gratings. This breakthrough enables tunable NIR plasmon sources for advanced applications.

Keywords:

atomically thin metamaterials electrostatic modulation near-infrared plasmonics niobium diselenide transition metal dichalcogenides

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Published on: September 27, 2011

Area of Science:

Condensed Matter Physics
Materials Science
Nanotechnology

Background:

Near-infrared (NIR) plasmonics are crucial for telecommunications, energy harvesting, and sensing.
Controlling bulk NIR plasmonics electrostatically is challenging due to electric-field screening and high carrier concentration requirements.

Purpose of the Study:

To overcome the limitations in electrostatic control of NIR plasmonics.
To demonstrate electrostatically tunable NIR plasmon resonances in 2D materials.

Main Methods:

Fabrication of few-layer niobium selenide (NbSe2) gratings using a solution method.
Characterization of NIR plasmonic resonances and their electrostatic modulation.

Main Results:

Observed NIR plasmonic resonances in NbSe2 gratings that are electrostatically tunable over a range of approximately 360 cm⁻¹.
Demonstrated enhanced electrostatics and strong field confinement due to the atomic thickness of 2D NbSe2.

Conclusions:

Atomically thin 2D materials, specifically NbSe2, enable electrostatically tunable NIR plasmonics.
Metallic 2D materials are promising candidates for developing tunable plasmonic devices in the NIR range.