Abstract-Plasmonic metamaterials reimagined (Conference Presentation)

Vladimir M. Shalaev

https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10536/105360V/Plasmonic-metamaterials-reimagined-Conference-Presentation/10.1117/12.2292987.short?SSO=1

The fields of nanophotonics, plasmonics and optical metamaterials have enabled unprecedented ways to control the flow light at both the micro- and nanometer length scales, unfolding new optical phenomena, with a potential to reshape the existing optical technologies and create new ones. In this presentation, emerging plasmonic, metamaterial and metasurfaces concepts as well as material platforms will be discussed with the focus on practical photonic technologies for communication, quantum optics, bio-medical and energy applications.
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

Abstract-VO2 as a natural optical metamaterial

Miller Eaton, Alessandra Catellani, Arrigo Calzolari

https://www.osapublishing.org/oe/abstract.cfm?uri=oe-26-5-5342

VO2 is a unique phase change material with strongly anisotropic electronic properties. Recently, samples have been prepared that present a co-existence of phases and thus form metal-insulator junctions of the same chemical compound. Using first principles calculations, the optical properties of metallic and semiconducting VO2 are here discussed to design self-contained natural optical metamaterials, avoiding coupling with other dielectric media. The analysis of the optical properties complements the experiments in the description of the vast change in reflectance and metallicity for both disordered and planar compounds. The present results also predict the possibility to realize ordered VO2 junctions operating as efficient hyperbolic metamaterials in the THz-visible range, by simply adjusting the ratio between metallic and insulating VO2 content. The possibility to excite propagating volume plasmom polariton across the metamaterial is finally discussed.

© 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Abstract-Electromagnetic resonant properties of metal-dielectric-metal (MDM) cylindrical microcavities

Hang Heng, Rong Wang

http://link.springer.com/article/10.1007/s13320-017-0379-3

Optical metamaterials can concentrate light into extremely tiny volumes to enhance their interaction with quantum objects. In this paper, a cylindrical microcavity based on the Au-dielectric-Au sandwiched structure is proposed. Numerical study shows that the cylindrical microcavity has the strong ability of localizing light and confining 103–~104–fold enhancement of the electromagnetic energy density, which contains the most energy of the incoming light. The enhancement factor of energy density G inside the cavity shows the regularities as the change in the thickness of the dielectric slab, dielectric constant, and the radius of gold disk. At the normal incidence of electromagnetic radiation, the obtained reflection spectra operate in the range from 4.8 μm to 6 μm and with the absorption efficiency C (C=1–Rmin), which can reach 99% by optimizing the structure’s geometry parameters, and the dielectric constant. Due to the symmetry of the cylindrical microcavities, this structure is insensitive to the polarization of the incident wave. The proposed optical metamaterials will have potential applications in the surface enhanced spectroscopy, new plasmonic detectors, bio-sensing, solar cells, etc.