High-sensitive plasmonic sensor based on Mach-Zehnder interferometer

Lotfi, Fariba; Sang-Nourpour, Nafiseh; Kheradmand, Reza

doi:10.1016/j.optlastec.2020.106809

Cited by 17 publications

(7 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Metamaterials permittivity and permeability depend on metamaterial's structure parameters [15]. The metamaterial parameters in this paper are F e = 1, F m = 0.8, ω 0e = 0, ω 0m = 0.02ω e , ω e = 1.37 × 10 16 s −1 and Γ m = Γ e = 2.73 × 10 13 s −1 [27]. We also employ noble metal Ag as a dispersive media in the waveguide structure.…”

Section: Modelmentioning

confidence: 99%

All-Optical Tunable Plasmonic Biosensor Made of Graphene and Metamaterial

2022

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Modelmentioning

confidence: 99%

All-Optical Tunable Plasmonic Biosensor Made of Graphene and Metamaterial

2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…There are mainly two techniques in integrated label-free optical sensing namely refractive index (RI) and absorption sensing 3 , 5 . RI sensor detects the real part n of the medium (analyte) refractive index 6 – 19 . RI sensors are suitable for small volume samples as n is related to concentration, not the total sample mass 3 .…”

Section: Introductionmentioning

confidence: 99%

“…Another advantage of RI sensors is that small changes in n over small distances can lead to a large change in the propagating wave phase reaching very high sensitivities through different optical devices. Mach–Zehnder Interferometer (MZI) 7 – 10 and micro-resonators 11 – 15 are the most widely used optical devices for RI sensing in addition to sensors using surface plasmon polariton (SPP) waves 2 , 16 – 19 . However, RI sensors are not selective, i.e.…”

Section: Introductionmentioning

confidence: 99%

On-chip complex refractive index detection at multiple wavelengths for selective sensing

Shamy

Swillam

2022

Sci Rep

View full text Add to dashboard Cite

In this work we propose a method for on-chip detection of the complex refractive index of the sensing medium at multiple wavelengths for selective sensing. For the optical sensor to be selective, i.e. able to determine the substance present in the medium, either surface functionalization or absorption spectroscopy is often used. Surface functionalization is a complex process and is mainly limited to biological media. On the other hand, absorption spectroscopy is not suitable for on-chip sensing with micrometer dimensions as this will result in poor sensitivity, especially when working far from the substance absorption peaks. Here, we detect the dispersion of both the real n and imaginary k parts of the refractive index which are unique for each substance. This is done using a single micro-ring resonator (MRR) that exhibits multiple resonances over the operating wavelength range. The real and imaginary parts of the medium refractive index are determined at each resonance using the resonance wavelength and the absorption coefficient, respectively. In addition, using this technique the concentration composition of a multi-element medium can be determined by solving a system of linear equations that corresponds to the different wavelengths (resonances). We designed a silicon-on-insulator (SOI) ring-resonator operating in the near-infrared region from λ = 1.46 µm to λ = 1.6 µm. The ring exhibits 11 resonances over the 140 nm operating wavelength range where the corresponding medium refractive index is obtained. This design can detect four different substances namely, methanol, ethanol, propanol, and water. An average error of less than 0.0047% and 1.65% in the detection of the real and imaginary parts, respectively were obtained. Finally, the concentration composition of different multi-element media were successfully determined using the least square method with 97.4% detection accuracy.

show abstract

“…Regarding the device structure, the device structures of existing optical waveguide sensors are mainly microdisk resonators [ 21 ], microring resonators [ 22 ], MZI [ 23 , 24 , 25 , 26 ], and Young’s interferometer [ 27 ]. Ring resonators are compact and easy to multiplex, but an expensive and bulky high-resolution wavelength-tunable laser is often required to operate the silicon microring resonator and its detection limit is ultimately restricted by the laser resolution [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Liquid M-Z Waveguide Sensor Based on Polymer Suspended Slot Waveguide Structure

Han

et al. 2022

Polymers

View full text Add to dashboard Cite

The slot structure has great advantages in improving the sensitivity of integrated waveguide optical sensors and reducing the detection limit. We propose a polymer Mach–Zehnder interferometer (MZI) optical sensor based on the slot structure and adopted the suspended structure to improve optical field interaction with the analyte, hence boosting the sensor’s sensing accuracy. In this paper, the effects of the single waveguide width, slot width, and coupling structure of the slot waveguide on the performance of the sensor operating at a 1550 nm wavelength were analyzed. Under the premise of satisfying single-mode transmission, we designed an MZI with a branch spacing of 10 µm, arm length of 2045 µm, branch span of 700 µm, and slot region of 500 µm. The sensor’s average sensitivity was 972.1 dB/RIU, and its average detection resolution was 1.6 × 10−6 RIU, which is approximately 1.5 times higher than that of the suspended strip waveguide, 1.6 times higher than that of the non-suspended slot structure, and 2.1 times higher than that of the non-suspended strip waveguide.

show abstract

High-sensitive plasmonic sensor based on Mach-Zehnder interferometer

Cited by 17 publications

References 56 publications

All-Optical Tunable Plasmonic Biosensor Made of Graphene and Metamaterial

All-Optical Tunable Plasmonic Biosensor Made of Graphene and Metamaterial

On-chip complex refractive index detection at multiple wavelengths for selective sensing

Highly Sensitive Liquid M-Z Waveguide Sensor Based on Polymer Suspended Slot Waveguide Structure

Contact Info

Product

Resources

About