Refractive-Index Sensing with Ultrathin Plasmonic Nanotubes

被引:74
作者
Raza, Soren [1 ,2 ]
Toscano, Giuseppe [1 ]
Jauho, Antti-Pekka [3 ]
Mortensen, N. Asger [1 ]
Wubs, Martijn [1 ]
机构
[1] Tech Univ Denmark, Dept Photon Engn, DK-2800 Lyngby, Denmark
[2] Tech Univ Denmark, Ctr Elect Nanoscopy, DK-2800 Lyngby, Denmark
[3] Tech Univ Denmark, Dept Micro & Nanotechnol, DK-2800 Lyngby, Denmark
关键词
Refractive-index sensing; Nanoplasmonics; Hydrodynamic Drude model; OPTICAL-PROPERTIES; RESONANCE SENSORS; GOLD NANOSHELLS; NONLOCAL THEORY; METALLIC-FILMS; NANOPARTICLES; HYBRIDIZATION; EXTINCTION; SPHERES;
D O I
10.1007/s11468-012-9375-z
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We study the refractive-index sensing properties of plasmonic nanotubes with a dielectric core and ultrathin metal shell. The few nanometer thin metal shell is described by both the usual Drude model and the nonlocal hydrodynamic model to investigate the effects of nonlocality. We derive an analytical expression for the extinction cross section and show how sensing of the refractive index of the surrounding medium and the figure of merit are affected by the shape and size of the nanotubes. Comparison with other localized surface plasmon resonance sensors reveals that the nanotube exhibits superior sensitivity and comparable figure of merit.
引用
收藏
页码:193 / 199
页数:7
相关论文
共 28 条
[21]   Unusual resonances in nanoplasmonic structures due to nonlocal response [J].
Raza, Soren ;
Toscano, Giuseppe ;
Jauho, Antti-Pekka ;
Wubs, Martijn ;
Mortensen, N. Asger .
PHYSICAL REVIEW B, 2011, 84 (12)
[22]   OPTICAL PROPERTIES OF A PLASMA SPHERE [J].
RUPPIN, R .
PHYSICAL REVIEW LETTERS, 1973, 31 (24) :1434-1437
[23]   Extinction properties of thin metallic nanowires [J].
Ruppin, R .
OPTICS COMMUNICATIONS, 2001, 190 (1-6) :205-209
[24]   Surface plasmon polaritons on metal cylinders with dielectric core -: art. no. 125420 [J].
Schröter, U ;
Dereux, A .
PHYSICAL REVIEW B, 2001, 64 (12)
[25]   Geometrical parameters controlling sensitivity of nanoshell plasmon resonances to changes in dielectric environment [J].
Tam, F ;
Moran, C ;
Halas, NJ .
JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (45) :17290-17294
[26]   Modified field enhancement and extinction by plasmonic nanowire dimers due to nonlocal response [J].
Toscano, Giuseppe ;
Raza, Soren ;
Jauho, Antti-Pekka ;
Mortensen, N. Asger ;
Wubs, Martijn .
OPTICS EXPRESS, 2012, 20 (04) :4176-4188
[27]   Effect of aspect ratio on the inter-surface plasmonic coupling of tubular gold nanoparticle [J].
Zhu, J. ;
Li, F. -K. .
EUROPEAN PHYSICAL JOURNAL B, 2011, 80 (01) :83-87
[28]   Quantum Description of the Plasmon Resonances of a Nanoparticle Dimer [J].
Zuloaga, Jorge ;
Prodan, Emil ;
Nordlander, Peter .
NANO LETTERS, 2009, 9 (02) :887-891