Theoretical analysis and applications in inverse T-shape structure

Li, Boxun; Li, Hongjian; Zeng, Lili; Zhan, Shiping; He, Zhihui; Chen, Zhiquan; Xu, Hui

doi:10.1364/josaa.33.000811

Cited by 19 publications

(11 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The FOM of the sensor showed a significant improvement with respect to the Ref. [ 23 , 26 ]. Through the use of the independent double resonances, the high-performance sensor was demonstrated.…”

Section: Resultsmentioning

confidence: 99%

Self-Reference Refractive Index Sensor Based on Independently Controlled Double Resonances in Side-Coupled U-Shaped Resonators

Ren

Ming

2018

Sensors

View full text Add to dashboard Cite

A plasmonic, refractive, index nanosensor is investigated theoretically and numerically in two U-shaped cavities side-coupled to a metal–dielectric–metal (MDM) waveguide. A transparency window between two transmission dips is observed. The physical origin of the transmission phenomenon is revealed by mapping the magnetic field distribution. Independent double resonances are realized through the proposed design. Double resonances showed diverse responses to the variations of the structural dimensions. In particular, they presented different dependences on a refraction index of the medium in an individual resonator. One resonance exhibited a remarkable shift with the increase of the refraction index; however, the other resonance remained unchanged. On the basis of this unique characteristic of differing sensitivities, self-reference sensing is discussed. The nanosensor yielded a high sensitivity of 917 nm/RIU and a figure of merit of 180 RIU−1. This work is helpful in terms of the design of on-chip optical sensors with high sensitivity and improved detection accuracy in complicated environments.

show abstract

Section: Resultsmentioning

confidence: 99%

Self-Reference Refractive Index Sensor Based on Independently Controlled Double Resonances in Side-Coupled U-Shaped Resonators

Ren

Ming

2018

Sensors

View full text Add to dashboard Cite

show abstract

“…When SPs are coupled into the slot cavity, we define φ to be the phase delay per round-trip in slot cavity, and φ has the relation 19 φ = 4π n eff L / λ m + φ r , where n eff , λ m and φ r are the effective refractive index, resonance wavelength and phase shift of a beam reflected on the upper and lower facets of slot cavity, respectively. The φ r is very little which has no obvious effect on the resonant wavelength.…”

Section: Resultsmentioning

confidence: 99%

“…Based on the superposition principle of optics 26 , we qualitatively analyze the transmission spectral with different S 1 and S 2 . When the resonance condition is satisfied 19 : Φ = β m ·2 L + θ = 2mπ , where θ stands for the phase shift of a beam reflected on the up and down facets of the slot cavity. β m is the propagation constant of SPs corresponding to the m st order resonance mode of the slot cavity.…”

Section: Resultsmentioning

confidence: 99%

Dynamically tunable switch and filter in single slot cavity structure

Zeng

Zhang

et al. 2019

Sci Rep

Self Cite

View full text Add to dashboard Cite

A single slot cavity coupled with two waveguides has been researched in theory and simulation. The results comparison between theory and simulation shows they agree well. It is found that the lateral displacement S plays an important role in transmission properties. Moreover, increasing the width of the slot cavity results in the emergence of new resonant peaks. At the same time, the shift of the resonant peaks have been explained well. The slot cavity with Kerr nonlinear material can act as a dynamically tunable four channel switch and filter. The single slot cavity has the advantages of simple and compact structure, easy fabrication, and the excellent properties are helpful to control light in photonics circuits.

show abstract

“…1. The metal is chosen to be Au, and the substrate is SiO 2 , the permittivity of Au and SiO 2 reference to the reported articles [58][59][60].…”

Section: Structure Model and Simulation Methodsmentioning

confidence: 99%

Dual-Fano resonances and sensing properties in the crossed ring-shaped metasurface

Cui

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

We study dual-Fano resonances and its sensing properties in a crossed ring-shaped metasurface by use of the finite-different time-domain (FDTD) simulation. The results show that the dual-Fano resonances in the proposed crossed ring-shaped metasurface are caused by the interaction among three local surface plasmon resonances (LSPRs), and the spectra of dual-Fano resonances can be tuned by the radius of the circular ring (CR) nanostructure, the distance between the center of the two CRs in x direction, and the polarization of the incident light. Interestingly, single Fano resonance splits into dual-Fano resonances in the case of asymmetric ring structure arrangement or non-y-axis polarized incident or the distance d<120 nm. Moreover, we can also find that the refractive sensitivity in the proposed crossed ring-shaped metasurface can reach up to 1010 nm/RIU and 1300 nm/RIU at Fano resonance peak 1 and Fano resonance peak 2, respectively. These results may play an important role for designing high sensitive plasmonic sensors.

show abstract

Theoretical analysis and applications in inverse T-shape structure

Cited by 19 publications

References 41 publications

Self-Reference Refractive Index Sensor Based on Independently Controlled Double Resonances in Side-Coupled U-Shaped Resonators

Self-Reference Refractive Index Sensor Based on Independently Controlled Double Resonances in Side-Coupled U-Shaped Resonators

Dynamically tunable switch and filter in single slot cavity structure

Dual-Fano resonances and sensing properties in the crossed ring-shaped metasurface

Contact Info

Product

Resources

About