Field enhancement of a metal grating with nanocavities and its sensing applications

被引：10

作者：

Lu, Xiaoyuan ^{[1
]}

Lin, Juntang ^{[1
]}

机构：

[1] Xinxiang Med Univ, Sch Biomed Engn, Xinxiang 453003, Henan, Peoples R China

来源：

JOURNAL OF OPTICS | 2017年 / 19卷 / 05期

关键词：

plasmonics; subwavelength structures; magnetic field enhancement; nanostructures; SURFACE-PLASMON RESONANCE; ALUMINUM NANOPARTICLES; SPECTROSCOPY; ULTRAVIOLET; ABSORPTION; ABSORBER; ARRAYS; MODES; LIGHT;

D O I：

10.1088/2040-8986/aa64f0

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We theoretically investigate electric and magnetic field enhancements in nanocavities of all-metal metasurfaces, which can be controlled by varying two independent parameters of nanocavity width and length. Result shows that electric field enhancement is larger at resonance with nanocavity width 2 nm, while magnetic field enhancement is smaller. Additionally, operating as a sensor, its surface sensitivity reaches a value of 10 while the figure of merit is as high as 2.3. We conclude that a nanocavity inserted in a metal grating enlarges resonant wavelength shift in surface sensing applications, compared to similar structures without a nanocavity. This proposed structure has potential applications in molecular detection, refractive sensing, stem cell differentiation, and nonlinear effect based devices.

引用

页数：7

共 41 条

[1]

[Anonymous], 1998, Handbook of Optical Constants of Solids

[2]

[Anonymous], PHYS REV LETT

[3]

Armelles G, 2013, ADV OPT MATER, V1, P10, DOI [10.1002/adom.201370002, 10.1002/adom.201200011]

[4] Sub-wavelength plasmonic modes in a conductor-gap-dielectric system with a nanoscale gap [J].

Avrutsky, Ivan ;

Soref, Richard ;

Buchwald, Walter .

OPTICS EXPRESS, 2010, 18 (01) :348-363

[5] Midinfrared Plasmon-Enhanced Spectroscopy with Germanium Antennas on Silicon Substrates [J].

Baldassarre, Leonetta ;

Sakat, Emilie ;

Frigerio, Jacopo ;

Samarelli, Antonio ;

Gallacher, Kevin ;

Calandrini, Eugenio ;

Isella, Giovanni ;

Paul, Douglas J. ;

Ortolani, Michele ;

Biagioni, Paolo .

NANO LETTERS, 2015, 15 (11) :7225-7231

[6] Highly confined guiding of low-loss plasmon waves in hybrid metal-dielectric slot waveguides [J].

Bian, Yusheng ;

Gong, Qihuang .

NANOTECHNOLOGY, 2014, 25 (34)

[7] Total absorption of light by lamellar metallic gratings [J].

Bonod, Nicolas ;

Tayeb, Gerard ;

Maystre, Daniel ;

Enoch, Stefan ;

Popov, Evgeny .

OPTICS EXPRESS, 2008, 16 (20) :15431-15438

[8] Passivated Aluminum Nanohole Arrays for Label-Free Biosensing Applications [J].

Canalejas-Tejero, Victor ;

Herranz, Sonia ;

Bellingham, Alyssa ;

Moreno-Bondi, Maria Cruz ;

Barrios, Carlos Angulo .

ACS APPLIED MATERIALS & INTERFACES, 2014, 6 (02) :1005-1010

[9] Effects of Line and Pillar Array Microengineered SiO2 Thin Films on the Osteogenic Differentiation of Human Bone Marrow-Derived Mesenchymal Stem Cells [J].

Carvalho, Angela ;

Pelaez-Vargas, Alejandro ;

Hansford, Derek J. ;

Fernandes, Maria H. ;

Monteiro, Fernando J. .

LANGMUIR, 2016, 32 (04) :1091-1100

[10] Plasmonic Nanohole Arrays on a Robust Hybrid Substrate for Highly Sensitive Label-Free Biosensing [J].

Cetin, Arif E. ;

Etezadi, Dordaneh ;

Galarreta, Betty C. ;

Busson, Mickael P. ;

Eksioglu, Yasa ;

Altug, Hatice .

ACS PHOTONICS, 2015, 2 (08) :1167-1174

← 1 2 3 4 5 →