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Injection-seeded optoplasmonic amplifier in the visible.
Manas Ranjan Gartia1, Sujin Seo2, Junhwan Kim3
11] Department of Nuclear, Plasma and Radiological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA [2] Micro and Nano Technology Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
Scientific Reports
|August 27, 2014
Summary
This study introduces a novel hybrid optoplasmonic amplifier that uses a Raman signal for injection-seeding. This device offers enhanced spectral control and efficient narrowband optical power routing on-chip.
Area of Science:
- Optoelectronics
- Nanophotonics
- Spectroscopy
Background:
- Traditional optical amplifiers often suffer from limited temporal coherence and complex spectra due to reliance on spontaneous emission.
- Whispering gallery mode (WGM) resonators offer high Q factors but can be limited in spectral control for laser and amplifier applications.
Purpose of the Study:
- To propose and demonstrate a hybrid optoplasmonic amplifier.
- To achieve selective amplification of Raman signals with enhanced spectral control.
- To enable on-chip routing of narrowband optical power.
Main Methods:
- Development of a hybrid system combining a gain medium, a WGM resonator with a protein, and a plasmonic surface.
- Injection-seeding the amplifier with an internally generated Raman signal.
- Operation in the visible spectrum (563-675 nm).
Main Results:
- Evidence for optical amplification in the proposed hybrid system.
- Selective amplification of single or few Raman lines within the WGM resonator.
- Demonstration of spectral control via injection-locking, with effective Q determined by the Raman signal bandwidth.
Conclusions:
- The proposed hybrid optoplasmonic amplifier provides superior spectral control compared to previous WGM-based devices.
- This technology is well-suited for on-chip narrowband optical power routing.
- The system overcomes limitations associated with spontaneous emission-based amplification.
