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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

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Published on: July 21, 2018

Engineering light outcoupling in 2D materials.

Der-Hsien Lien¹, Jeong Seuk Kang, Matin Amani

¹Electrical Engineering and Computer Sciences, University of California , Berkeley, California 94720, United States.

|January 21, 2015

Summary

This summary is machine-generated.

Researchers enhanced light absorption and emission in 2D transition metal dichalcogenides (TMDCs) by engineering dielectric surroundings. This method significantly boosts Raman and photoluminescence signals in WSe2, paving the way for advanced optoelectronic devices.

Keywords:

2D materials Raman light outcoupling photoluminescence substrate interference

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Area of Science:

Materials Science
Optoelectronics
Nanotechnology

Background:

Light interactions with 2D transition metal dichalcogenides (TMDCs) are affected by substrate reflections, causing interference that alters light intensity.
Controlling these interferences is crucial for optimizing light absorption and emission in TMDCs.

Purpose of the Study:

To develop a simple method for engineering light outcoupling in semiconducting TMDCs.
To enhance the optical properties of WSe2 by modulating its dielectric environment.

Main Methods:

Modulating the thicknesses of underlying substrates and capping layers to control light interference.
Utilizing an interference model to guide the engineering of photonic and optoelectronic properties.

Main Results:

Achieved significant enhancement in light absorption and emission of WSe2 through substrate interference.
Observed an approximately 11-fold increase in Raman signal and a 30-fold increase in photoluminescence (PL) intensity of WSe2.
Demonstrated a strategy to control the photonic and optoelectronic properties of thin-layer WSe2.

Conclusions:

Outcoupling engineering is an effective strategy for enhancing light manipulation in 2D materials.
The developed method offers a new pathway for creating novel optoelectronic devices, including 2D LEDs and solar cells.