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Plasmonic Trapping and Release of Nanoparticles in a Monitoring Environment

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Published on: April 4, 2017

Direct On-Chip Optical Plasmon Detection with an Atomically Thin Semiconductor.

Kenneth M Goodfellow, Chitraleema Chakraborty, Ryan Beams

¹¶Photonics Laboratory, ETH Zürich, 8093 Zürich, Switzerland.

|June 30, 2015

Summary

This summary is machine-generated.

Researchers developed a new on-chip plasmon detector using silver nanowires and molybdenum disulfide. This device enables efficient near-field plasmon detection, overcoming limitations in photonic circuit miniaturization.

Keywords:

Molybdenum disulfide nanophotonics silver nanowires surface plasmon polaritons

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Area of Science:

Nanophotonics
Materials Science
Electrical Engineering

Background:

Photonic circuits face limitations in miniaturization due to the diffraction limit of light.
Surface plasmon polaritons (SPPs) coupled with nanostructures offer a pathway for next-generation integrated circuitry.
Near-field plasmon detection is crucial for sub-diffraction limit optical devices.

Purpose of the Study:

To demonstrate the integration of nanoplasmonic light guides with atomically thin materials for on-chip near-field plasmon detection.
To investigate the use of molybdenum disulfide (MoS2) for plasmon excitation and detection.
To develop a highly efficient integrated plasmon detector.

Main Methods:

Fabrication of integrated nanoplasmonic light guides using silver nanowires.
Integration of atomically thin molybdenum disulfide (MoS2) as the active detection material.
Electrical characterization of the device for plasmon responsivity measurements.

Main Results:

Successful near-field electrical detection of silver nanowire plasmons using MoS2.
MoS2's bandgap facilitates efficient plasmon excitation and detection, unlike gapless materials like graphene.
Achieved plasmon responsivities of approximately 255 mA/W, indicating highly efficient plasmon detection (around 0.5 electrons per plasmon).

Conclusions:

Atomically thin semiconductors, specifically MoS2, are promising for on-chip plasmon detection.
The integrated nanoplasmonic detector demonstrates efficient near-field plasmon sensing capabilities.
This technology paves the way for miniaturized, high-performance photonic integrated circuits.