Low-Loss, Extreme Subdiffraction Photon Confinement via Silicon Carbide Localized Surface Phonon Polariton Resonators

被引：279

作者：

Caldwell, Joshua D. ^{[1
]}

Glembocki, Orest J. ^{[1
]}

Francescato, Yan ^{[2
]}

Sharac, Nicholas ^{[4
]}

Giannini, Vincenzo ^{[2
]}

Bezares, Francisco J. ^{[1
]}

Long, James P. ^{[1
]}

Owrutsky, Jeffrey C. ^{[1
]}

Vurgaftman, Igor ^{[1
]}

Tischler, Joseph G. ^{[1
]}

Wheeler, Virginia D. ^{[1
]}

Bassim, Nabil D. ^{[1
]}

Shirey, Loretta M. ^{[1
]}

Kasica, Richard ^{[3
]}

Maier, Stefan A. ^{[2
]}

机构：

[1] US Naval Res Lab, Washington, DC USA

[2] Univ London Imperial Coll Sci Technol & Med, Dept Phys, Blackett Lab, London, England

[3] NIST, Ctr Nanoscale Technol, Gaithersburg, MD 20899 USA

[4] Univ Calif Irvine, Dept Chem Engn & Mat Sci, Irvine, CA USA

来源：

NANO LETTERS | 2013年 / 13卷 / 08期

基金：

英国工程与自然科学研究理事会;

关键词：

Optical phonon; polar dielectric; phonon polariton; silicon carbide; nanopillar; subdiffraction confinement; plasmonics; nanoantenna; mid-infrared; ENHANCED INFRARED-ABSORPTION; NANOANTENNA ARRAYS; GRAPHENE PLASMONICS; RAMAN-SCATTERING; SPECTROSCOPY; LIGHT; NANOPARTICLES; RESONANCES; NANOSCALE; EMISSION;

D O I：

10.1021/nl401590g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Plasmonics provides great promise for nanophotonic applications. However, the high optical losses inherent in metal-based plasmonic systems have limited progress. Thus, it is critical to identify alternative low-loss materials. One alternative is polar dielectrics that support surface phonon polariton SPhP) modes, where the confinement of infrared light is aided by optical phonons. Using fabricated 6H-silicon carbide nanopillar antenna arrays, we report on the observation of subdiffraction, localized SPhP resonances. They exhibit a dipolar resonance transverse to the nanopillar axis and a monopolar resonance associated with the longitudinal axis dependent upon the SiC substrate. Both exhibit exceptionally narrow linewidths (7-24 cm(-1)), with quality factors of 40-135, which exceed the theoretical limit of plasmonic systems, with extreme subwavelength confinement of (lambda(3)(res)/V-eff)(1/3) = 50-200. Under certain conditions, the modes are Raman-active, enabling their study in the visible spectral range. These observations promise to reinvigorate research in SPhP phenomena and their use for nanophotonic applications.

引用

页码：3690 / 3697

页数：8

共 58 条

[1] Ultra-sensitive vibrational spectroscopy of protein monolayers with plasmonic nanoantenna arrays [J].