Manipulating photon−plasmon coupling in microtube cavities
In situ generation of silver nanoparticles for selective coupling between localized plasmonic resonances and whispering-gallery modes is demonstrated by spatially resolved laser dewetting on microtube surfaces. Our work provides a convenient way to manipulate photon-plasmon coupling in three-dimensional micro-cavities, which is of interest for optical tuning abilities and control of enhanced light-matter interaction.
Selective plasmon-photon coupling in tubular microcavities
A plasmonic nanogap is designed in three-dimensionally confined microtubular cavities to demonstrate efficient coupling of localized surface plasmons (LSPs) and resonant light. Selective coupling of LSPs and resonant modes is achieved, exhibiting spatial dependence of the plasmonic nanogap on the microcavities. Our work reveals the interaction of surface plasmon resonances localized at the nanoscale with optical resonances confined at the microscale, thus establishing a unique platform for the investigation of light-matter interactions.
Metamaterial fiber optics
A metamaterial integration for fiber optics, leading to a dual effect of surface plasmon and classical waveguiding, is presented along with experimental potentiality. We theoretically propose a metamaterial fiber in which, depending on the wavelength (from ultraviolet to infrared) and the particular metamaterial composition, one can transmit information through surface plasmon mediated or classical waveguidance. The metamaterial can be used as the core or cladding of a fiber which allows waveguidance through a subwavelength geometry.
E. J. Smith et al., Nano Lett. 10, 1, 1-5 (2010) URL PDF
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An investigation of the material makeup and surrounding medium of an optical rolled-up hyperlens is presented. A working spectral range of the hyperlens for different material combinations is studied along with an examination of hyperlens immersion, which suppresses the diffraction of waves exiting the lens due to impedance matching, leading to a higher intensity output. This hyperlens immersion technique can be implemented into cell culture and molecular analysis.