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Resonance modulated amplified emission from CdSSe nanoribbons
T Wood1, K T Cheung1, Y Foo1
1Department of Physics and Materials Science and Centre of Super Diamond and Advanced Films (COSDAF), City University of Hong Kong, Hong Kong.
Scientific Reports
|October 17, 2015
Summary
We demonstrate amplified light emission from cadmium sulfide selenide nanoribbons using surface plasmon polaritons. This effect, observed at room temperature, is enhanced by a gold-coated substrate acting as a resonator.
Area of Science:
- Materials Science
- Optoelectronics
- Nanotechnology
Background:
- Surface plasmon polaritons (SPPs) enable enhanced light-matter interactions.
- Semiconductor nanostructures offer unique optical properties for device applications.
Purpose of the Study:
- To investigate amplified emission from CdS0.2Se0.8 nanoribbons.
- To explore the role of surface plasmon polaritons in emission enhancement.
- To demonstrate room-temperature amplified spontaneous emission.
Main Methods:
- Fabrication of CdS0.2Se0.8 nanoribbons on a gold-coated silicon substrate.
- Optical excitation using controlled irradiance levels.
- Spectroscopic analysis of emission properties.
Main Results:
- Observed room-temperature amplified emission above 25 W/cm(2) excitation irradiance.
- Identified the nanoribbon acting as a resonator cavity for discrete wavelengths.
- Provided evidence for SPP wave formation between the nanoribbon and substrate.
Conclusions:
- The gold substrate facilitates SPP formation, enhancing emission.
- The nanoribbon-substrate system acts as a resonant cavity for amplified light.
- This work highlights potential for plasmon-enhanced nanophotonic devices.
