Injection-seeded optoplasmonic amplifier in the visible

Manas Ranjan Gartia, Sujin Seo, Junhwan Kim, Te Wei Chang, Gaurav Bahl, Meng Lu, Gang Logan Liu, J. Gary Eden

Research output: Contribution to journalArticlepeer-review


A hybrid optoplasmonic amplifier, injection-seeded by an internally-generated Raman signal and operating in the visible (563-675â €...nm), is proposed and evidence for amplification is presented. Comprising a gain medium tethered to a whispering gallery mode (WGM) resonator with a protein, and a plasmonic surface, the optical system described here selectively amplifies a single (or a few) Raman line(s) produced within the WGM resonator and is well-suited for routing narrowband optical power on-a-chip. Over the past five decades, optical oscillators and amplifiers have typically been based on the buildup of the field from the spontaneous emission background. Doing so limits the temporal coherence of the output, lengthens the time required for the optical field intensity to reach saturation, and often is responsible for complex, multiline spectra. In addition to the spectral control afforded by injection-locking, the effective Q of the amplifier can be specified by the bandwidth of the injected Raman signal. This characteristic contrasts with previous WGM-based lasers and amplifiers for which the Q is determined solely by the WGM resonator.

Original languageEnglish (US)
Article number6168
JournalScientific reports
StatePublished - Aug 26 2014

ASJC Scopus subject areas

  • General


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