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Electrospray Deposition of Uniform Thickness Ge23Sb7S70 and As40S60 Chalcogenide Glass Films

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Published on: August 19, 2016

Two-dimensional metal-chalcogenide films in tunable optical microcavities.

S Schwarz¹, S Dufferwiel, P M Walker

¹Department of Physics and Astronomy, University of Sheffield , Sheffield S3 7RH, United Kingdom.

|November 7, 2014

Summary

We integrated quasi-two-dimensional (2D) metal-chalcogenide films into optical microcavities. This resulted in tunable, narrow photoluminescence (PL) modes and a 10-fold shortening of PL lifetime due to Purcell enhancement.

Keywords:

2D materials Molybdenum disulfide Purcell effect gallium selenide photonics tunable microcavities

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Area of Science:

Materials Science
Optics
Condensed Matter Physics

Background:

Quasi-two-dimensional (2D) metal-chalcogenide films offer unique optical properties.
Optical microcavities confine light and enhance light-matter interactions.
Integrating these materials into microcavities enables novel photonic applications.

Purpose of the Study:

To create tunable optical microcavities incorporating monolayer Molybdenum Disulfide (MoS2) or few-layer Gallium Selenide (GaSe) films.
To investigate the impact of these 2D materials on the spectral and temporal characteristics of photoluminescence (PL).

Main Methods:

Fabrication of optical microcavities with integrated monolayer MoS2 or few-layer GaSe.
Characterization of photoluminescence (PL) emission spectra and lifetime measurements.
Analysis of spectral narrowing, wavelength tunability, and Purcell enhancement effects.

Main Results:

Observation of spectrally narrow and wavelength-tunable cavity modes.
Achieved high quality factors (up to 7400) for the microcavities.
Demonstrated a significant 10-fold shortening of PL lifetime, indicating enhanced spontaneous emission rates.

Conclusions:

The integration of 2D metal-chalcogenides into optical microcavities effectively modifies their photonic properties.
Tunable cavity modes and enhanced spontaneous emission rates open avenues for advanced photonic devices.
This work highlights the potential of MoS2 and GaSe in microcavity-based optoelectronics.