Subwavelength acoustic focusing by surface-wave-resonance enhanced transmission in doubly negative acoustic metamaterials

2014 ◽  
Vol 116 (19) ◽  
pp. 194501 ◽  
Author(s):  
Xiaoming Zhou ◽  
M. Badreddine Assouar ◽  
Mourad Oudich
Keyword(s):  
Surface Wave ◽  
Acoustic Metamaterials ◽  
Enhanced Transmission ◽  
Wave Resonance ◽  
Acoustic Focusing

scholarly journals Bloch Surface Wave Resonance Based Sensors as an Alternative to Surface Plasmon Resonance Sensors

Sensors ◽  
2020 ◽  
Vol 20 (18) ◽  
pp. 5119 ◽  
Author(s):  
Michal Gryga ◽  
Dalibor Ciprian ◽  
Petr Hlubina
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Wave ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Moist Air ◽  
Polarized Waves ◽  
Wave Resonance ◽  
Highly Sensitive ◽  
Bloch Surface Wave ◽  
Spr Effect

We report on a highly sensitive measurement of the relative humidity (RH) of moist air using both the surface plasmon resonance (SPR) and Bloch surface wave resonance (BSWR). Both resonances are resolved in the Kretschmann configuration when the wavelength interrogation method is utilized. The SPR is revealed for a multilayer plasmonic structure of SF10/Cr/Au, while the BSWR is resolved for a multilayer dielectric structure (MDS) comprising four bilayers of TiO2/SiO2 with a rough termination layer of TiO2. The SPR effect is manifested by a dip in the reflectance of a p-polarized wave, and a shift of the dip with the change in the RH, or equivalently with the change in the refractive index of moist air is revealed, giving a sensitivity in a range of 0.042–0.072 nm/%RH. The BSWR effect is manifested by a dip in the reflectance of the spectral interference of s- and p-polarized waves, which represents an effective approach in resolving the resonance with maximum depth. For the MDS under study, the BSWRs were resolved within two band gaps, and for moist air we obtained sensitivities of 0.021–0.038 nm/%RH and 0.046–0.065 nm/%RH, respectively. We also revealed that the SPR based RH measurement is with the figure of merit (FOM) up to 4.7 × 10−4 %RH−1, while BSWR based measurements have FOMs as high as 3.0 × 10−3 %RH−1 and 1.1 × 10−3 %RH−1, respectively. The obtained spectral interferometry based results demonstrate that the BSWR based sensor employing the available MDS has a similar sensitivity as the SPR based sensor, but outperforms it in the FOM. BSW based sensors employing dielectrics thus represent an effective alternative with a number of advantages, including better mechanical and chemical stability than metal films used in SPR sensing.

Surface wave resonance and chirality in a tubular cavity with metasurface design

2018 ◽  
Vol 417 ◽  
pp. 42-45 ◽  
Author(s):  
Yuzhou Qin ◽  
Yangfu Fang ◽  
Lu Wang ◽  
Shiwei Tang ◽  
Shulin Sun ◽  
...  
Keyword(s):  
Surface Wave ◽  
Wave Resonance

Study on Tunable Filtering Characteristic of 1-D Defect Photonic Crystal Based on Surface Wave Resonance

2013 ◽  
Vol 336-338 ◽  
pp. 379-382
Author(s):  
Ying Chen ◽  
Wei Hong Bi ◽  
Qi Guang Zhu
Keyword(s):  
Photonic Crystal ◽  
Surface Wave ◽  
Optical Biosensor ◽  
Defect Layer ◽  
Surface Plasma Resonance ◽  
Reflective Spectrum ◽  
Wave Resonance ◽  
Resonance Principle ◽  
Sensing Model ◽  
The Relationship

A optical biosensor used in index dynamic detection has been proposed combining the tunable filtering characteristics of defect photonic crystal with the surface wave resonance principle. The sensing model of the biosensing chip based on defect photonic crystal has been established based on rigid coupled wave method, which obtained the relationship between the change of resonant angle for reflective spectrum and the variation of refractive index for biomolecule detected. Using the photonic crystal with the defect layer in place of the metal film in the surface plasma resonance (SPR) sensor, repeatedly total reflection would take place in the defect layer, which would increase the senstivity of the measurement system.

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