Nanoassembled Plasmonic-Photonic Hybrid Cavity for Tailored Light-Matter Coupling

• Published in: Nano letters Vol. 10; no. 3; pp. 891 - 895
• Main Authors: Barth, Michael, Schietinger, Stefan, Fischer, Sabine, Becker, Jan, Nüsse, Nils, Aichele, Thomas, Löchel, Bernd, Sönnichsen, Carsten, Benson, Oliver
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 10.03.2010
• Subjects: Collective excitations (including excitons, polarons, plasmons and other charge-density excitations); Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures; Equipment Design; Equipment Failure Analysis; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties; Materials science; Nanocrystalline materials; Nanoscale materials and structures: fabrication and characterization; Nanotechnology - instrumentation; Optical materials; Optics; Photonic bandgap materials; Photons; Physics; Refractometry - instrumentation; Surface and interface electron states; Surface Plasmon Resonance - instrumentation; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Transducers; plasmonic nanostructures; Photonic crystal cavities; nanoassembly; Nanoparticles; Nanometer scale; Feedback; Quality factor; Photonic crystals; Plasmons; Nanostructures; Nanostructured materials; Crystal structure
• ISSN: 1530-6984; 1530-6992
• DOI: 10.1021/nl903555u

We propose and demonstrate a hybrid cavity system in which metal nanoparticles are evanescently coupled to a dielectric photonic crystal cavity using a nanoassembly method. While the metal constituents lead to strongly localized fields, optical feedback is provided by the surrounding photonic crystal structure. The combined effect of plasmonic field enhancement and high quality factor (Q ≈ 900) opens new routes for the control of light-matter interaction at the nanoscale.