Dual narrow-band absorber based on metal-insulator-metal configuration for refractive index sensing.

Plasmonic gap mode in metal-insulator-metal (MIM) structure has proven promising for refractive index sensing due to its near unity absorption. However, the sensing performance of gap mode has been limited by the broad resonance band, which is related to high plasmonic loss. In this work, square-patch-based MIM structures are used for simultaneous excitation of both the surface plasmon polariton and Rayleigh anomaly with large absorptions, and demonstrate their excellent sensing performances. For the Rayleigh anomaly, the sensitivity and full width half-maximum are 1470 nm/RIU and 0.23 nm, respectively. The corresponding figure of merit is calculated to be 6400 in wavelength shift form and 58,800 in intensity variation form. It is also observed that the two Wood's anomalies have reverse incident-angle-dependent properties, which can be explained by the opposite propagating direction of surface waves.

[1]  Gennady Shvets,et al.  Fano-resonant asymmetric metamaterials for ultrasensitive spectroscopy and identification of molecular monolayers. , 2012, Nature materials.

[2]  S. Bozhevolnyi,et al.  Plasmonic metasurfaces for efficient phase control in reflection. , 2013, Optics express.

[3]  Z. Qi,et al.  Waveguide-coupled directional Raman radiation for surface analysis. , 2015, Physical chemistry chemical physics : PCCP.

[4]  John A Rogers,et al.  Coupling of plasmonic and optical cavity modes in quasi-three-dimensional plasmonic crystals. , 2011, Nature communications.

[5]  Yuebing Zheng,et al.  Optimizing plasmonic nanoantennas via coordinated multiple coupling , 2015, Scientific Reports.

[6]  Liesbet Lagae,et al.  Plasmon line shaping using nanocrosses for high sensitivity localized surface plasmon resonance sensing. , 2011, Nano letters.

[7]  Jing Wang,et al.  High performance optical absorber based on a plasmonic metamaterial , 2010 .

[8]  E. Centeno,et al.  Interferometric control of the absorption in optical patch antennas , 2017, Scientific Reports.

[9]  Xueqin Huang,et al.  Optical metamaterial for polarization control , 2009 .

[10]  Anders Pors,et al.  Broadband plasmonic half-wave plates in reflection. , 2013, Optics letters.

[11]  Xiaodong Yang,et al.  Enhancing intensity and refractive index sensing capability with infrared plasmonic perfect absorbers. , 2014, Optics letters.

[12]  Guohui Xiao,et al.  Plasmonic gold mushroom arrays with refractive index sensing figures of merit approaching the theoretical limit , 2013, Nature Communications.

[13]  Weijia Wen,et al.  Multiband subwavelength magnetic reflectors based on fractals , 2003 .

[14]  Sergey I. Bozhevolnyi,et al.  Gap plasmon-based metasurfaces for total control of reflected light , 2013, Scientific Reports.

[15]  Haiqing Zhou,et al.  λ3/20000 plasmonic nanocavities with multispectral ultra-narrowband absorption for high-quality sensing , 2014 .

[16]  Zhongyuan Yu,et al.  Infrared Plasmonic Refractive Index Sensor with Ultra-High Figure of Merit Based on the Optimized All-Metal Grating , 2017, Nanoscale Research Letters.

[17]  Vincenzo Galdi,et al.  Surface sensitivity of Rayleigh anomalies in metallic nanogratings. , 2013, Optics express.

[18]  Willie J Padilla,et al.  Highly-flexible wide angle of incidence terahertz metamaterial absorber , 2008, 0808.2416.

[19]  Thomas W. Ebbesen,et al.  Surface plasmons enhance optical transmission through subwavelength holes , 1998 .

[20]  Shuang Zhang,et al.  Electromagnetic reprogrammable coding-metasurface holograms , 2017, Nature Communications.

[21]  Chih-Ming Wang,et al.  High-efficiency broadband anomalous reflection by gradient meta-surfaces. , 2012, Nano letters.

[22]  Ai Qun Liu,et al.  High-efficiency broadband meta-hologram with polarization-controlled dual images. , 2014, Nano letters.

[23]  Xin Li,et al.  Flat metasurfaces to focus electromagnetic waves in reflection geometry. , 2012, Optics letters.

[24]  T. Jiang,et al.  Manipulating electromagnetic wave polarizations by anisotropic metamaterials. , 2007, Physical review letters.

[25]  S. Bozhevolnyi,et al.  Broadband focusing flat mirrors based on plasmonic gradient metasurfaces. , 2013, Nano letters.

[26]  M. Hentschel,et al.  Infrared perfect absorber and its application as plasmonic sensor. , 2010, Nano letters.

[27]  Xinbing Wang,et al.  Perfect narrow band absorber for sensing applications. , 2016, Optics express.