Tightly trapped acoustic phonons in photonic crystal fibres as highly nonlinear artificial Raman oscillators

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dc.contributor.authorKang, Myeong Sooko
dc.contributor.authorNazarkin, A.ko
dc.contributor.authorBrenn, A.ko
dc.contributor.authorRussell, P. St. J.ko
dc.date.accessioned2017-01-18T03:01:15Z-
dc.date.available2017-01-18T03:01:15Z-
dc.date.created2013-11-08-
dc.date.created2013-11-08-
dc.date.issued2009-04-
dc.identifier.citationNATURE PHYSICS, v.5, no.4, pp.276 - 280-
dc.identifier.issn1745-2473-
dc.identifier.urihttp://hdl.handle.net/10203/219708-
dc.description.abstractInteractions between light and hypersonic waves can be enhanced by tight field confinement, as shown in periodically structured materials(1), microcavities(2), micromechanical resonators(3) and photonic crystal fibres(4-6) (PCFs). There are many examples of weak sound-light interactions, for example, guided acoustic-wave Brillouin scattering in conventional optical fibres(7). This forward-scattering effect results from the interaction of core-guided light with acoustic resonances of the entire fibre cross-section, and is viewed as a noise source in quantum-optics experiments(8). Here, we report the observation of strongly nonlinear forward scattering of laser light by gigahertz acoustic vibrations, tightly trapped together in the small core of a silica-air PCF. Bouncing to and fro across the core at close to 90 degrees to the fibre axis, the acoustic waves form optical-phonon-like modes with a flat dispersion curve and a distinct cutoff frequency Omega(a). This ensures automatic phase-matching to the guided optical mode so that, on pumping with a dual-frequency laser source tuned to Omega(a), multiple optical side bands are generated, spaced by Omega(a). The number of strong side bands in this Raman-like process increases with pump power. The results point to a new class of designable nonlinear optical device with applications in, for example, pulse synthesis, frequency comb generation for telecommunications and fibre laser mode-locking.-
dc.languageEnglish-
dc.publisherNATURE PUBLISHING GROUP-
dc.titleTightly trapped acoustic phonons in photonic crystal fibres as highly nonlinear artificial Raman oscillators-
dc.typeArticle-
dc.identifier.wosid000265264500017-
dc.type.rimsART-
dc.citation.volume5-
dc.citation.issue4-
dc.citation.beginningpage276-
dc.citation.endingpage280-
dc.citation.publicationnameNATURE PHYSICS-
dc.identifier.doi10.1038/NPHYS1217-
dc.contributor.localauthorKang, Myeong Soo-
dc.contributor.nonIdAuthorNazarkin, A.-
dc.contributor.nonIdAuthorBrenn, A.-
dc.contributor.nonIdAuthorRussell, P. St. J.-
dc.type.journalArticleArticle-
dc.subject.keywordPlusSTIMULATED BRILLOUIN-SCATTERING-
dc.subject.keywordPlusOPTICAL-FIBERS-
dc.subject.keywordPlusSURFACE-PLASMONS-
dc.subject.keywordPlusGENERATION-
dc.subject.keywordPlusPROPAGATION-
dc.subject.keywordPlusMODULATION-
dc.subject.keywordPlusWAVES-
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