Significantly Enhanced Coupling Effect and Gap Plasmon Resonance in a MIM-cavity based Sensing Structure

Chau, Yuan-Fong Chou; Ming, Tan Yu; Chao, Chung-Ting Chou; Thotagamuge, Roshan; Kooh, Muhammad Raziq Rahimi; Huang, Hung Ji; Lim, Chee Ming; Chiang, Hai-Pang

doi:10.21203/rs.3.rs-708969/v1

Cited by 3 publications

(3 citation statements)

References 58 publications

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“…Figure 7 shows the sensing performance of the probe with a polished depth of 100 µm. As shown in Figure 7a, as the RI increases, the SPR peak of the probe undergoes a redshift [35]. Figure 7b shows the relationship of the RI and SPR peak wavelength.…”

Section: Resultsmentioning

confidence: 88%

Side-Polish Plastic Optical Fiber Based SPR Sensor for Refractive Index and Liquid-Level Sensing

Teng

Ying

Min

et al. 2022

Sensors

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In this work, a simple side-polish plastic optical fiber (POF)-based surface plasmon resonance (SPR) sensor is proposed and demonstrated for simultaneous measurement of refractive index (RI) and liquid level. The effects of side-polish depths on the sensing performance were studied. The experimental results show that the SPR peak wavelength will be changed as the RI changes, and the SPR peak intensity will be changed with the liquid level variation. By monitoring the changes in peak wavelength and intensity, the RI and liquid level can be detected simultaneously. Experimental results show that an RI sensitivity of 2008.58 nm/RIU can be reached at an RI of 1.39. This sensor has the advantages of simple structure and low cost, which has a good prospect in the field of biochemical sensing.

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Section: Resultsmentioning

confidence: 88%

Side-Polish Plastic Optical Fiber Based SPR Sensor for Refractive Index and Liquid-Level Sensing

Teng

Ying

Min

et al. 2022

Sensors

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“…Optical sensors that are based on surface plasmon resonance (SPR) provide a labelfree, real-time detection technique for many specimens in chemistry [1], biology [2], and environmental sciences [3]. Different designs have been applied to enhance the coupling of the incoming light to the SPR [4,5]. The mechanisms of such devices are purely optical-, phase-, spectral-, angular-, or intensity-interrogated [6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Optical Sensing Using Hybrid Multilayer Grating Metasurfaces with Customized Spectral Response

Elshorbagy,

Cuadrado,

Alda

2024

Sensors

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Customized metasurfaces allow for controlling optical responses in photonic and optoelectronic devices over a broad band. For sensing applications, the spectral response of an optical device can be narrowed to a few nanometers, which enhances its capabilities to detect environmental changes that shift the spectral transmission or reflection. These nanophotonic elements are key for the new generation of plasmonic optical sensors with custom responses and custom modes of operation. In our design, the metallic top electrode of a hydrogenated amorphous silicon thin-film solar cell is combined with a metasurface fabricated as a hybrid dielectric multilayer grating. This arrangement generates a plasmonic resonance on top of the active layer of the cell, which enhances the optoelectronic response of the system over a very narrow spectral band. Then, the solar cell becomes a sensor with a response that is highly dependent on the optical properties of the medium on top of it. The maximum sensitivity and figure of merit (FOM) are SB = 36,707 (mA/W)/RIU and ≈167 RIU−1, respectively, for the 560 nm wavelength using TE polarization. The optical response and the high sensing performance of this device make it suitable for detecting very tiny changes in gas media. This is of great importance for monitoring air quality and thecomposition of gases in closed atmospheres.

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“…The smaller the width of the metal-dielectric-metal (MDM) waveguide is, the stronger the field confinement is, and the higher the propagation losses because as the dielectric width of the MDM waveguide decreases, the effective refractive index increases and consequently the interaction with metal increases. The unique advantages of MDM waveguides 2 (i.e., simple fabrication, long transmission distance, and broad spectral range of operation) have attracted much interest; MDM waveguides are used in many optical devices, such as power splitters, [3][4][5][6] Mach-Zehnder interferometers, [7][8][9][10] filters, [11][12][13][14] switches, [15][16][17][18] sensors, [19][20][21][22] and photovoltaic devices. [23][24][25][26] In order to reduce the propagation losses of the MDM waveguides, it is important to use the low propagation loss of conventional dielectric waveguides (CDWs) to transfer light into and out of the MDM waveguides.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the coupling characteristics of a sandwiched plasmonic waveguide between two dielectric waveguides using air-gap couplers to achieve high-performance optical interconnects

Wahsheh

2022

Opt. Eng.

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. To achieve ultrahigh-density nanoplasmonic integrated circuits, low-loss conventional dielectric waveguides (CDWs) are used to transfer light into and out of the metal–dielectric–metal (MDM) plasmonic waveguides. We show that sandwiching the MDM plasmonic waveguide between two CDWs forms a Fabry–Perot cavity-like structure, which causes oscillations in the transmission coupling efficiency (TCE) into the output CDW as the length of the MDM waveguide is increased. Three types of compact air-gap couplers (AGCs) were used at the interface between those two types of waveguides to enhance the coupling efficiency between them. Our simulation results indicate that tapering CDW before it is connected to AGC not only enhances TCE into the output CDW by 9% over a wide spectrum range but also reduces the need for high-precision fabrication techniques to align AGC at the interface. Moreover, we achieved a TCE into the output CDW of 77% optimized for the optical communications wavelength of 1550 nm when the length of the MDM plasmonic waveguide is 600 nm. In addition, we showed that our proposed design has large fabrication tolerance by investigating the change in its spectrum response as various parameters of the design dimensions differ from that of the targeted optimum dimensions. We found that increasing the dimensions of AGC reduces the width of the spectrum, whereas increasing the width of CDW with its tapered part shifts the spectrum to the right by 100 nm per 40 nm increase in the width. We also found that increasing the refractive index of the MDM plasmonic waveguide with AGC controls the cutoff wavelength, in which TCE is almost zero at wavelengths shorter than the cutoff wavelength, and consequently provides a unique advantage in using our proposed design in sensing applications.

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Significantly Enhanced Coupling Effect and Gap Plasmon Resonance in a MIM-cavity based Sensing Structure

Cited by 3 publications

References 58 publications

Side-Polish Plastic Optical Fiber Based SPR Sensor for Refractive Index and Liquid-Level Sensing

Side-Polish Plastic Optical Fiber Based SPR Sensor for Refractive Index and Liquid-Level Sensing

Optical Sensing Using Hybrid Multilayer Grating Metasurfaces with Customized Spectral Response

Evaluation of the coupling characteristics of a sandwiched plasmonic waveguide between two dielectric waveguides using air-gap couplers to achieve high-performance optical interconnects

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