One‐Dimensional Semiconducting Hybrid Nanostructure: Gas Sensing and Optoelectronic Applications

Rawat, Jyoti; Sharma, Himani; Dwivedi, Charu

doi:10.1002/9783527837649.ch1

Cited by 2 publications

(2 citation statements)

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“…A modern simplification of these sensors is obtained by attaching them to photodetectors, which extract the measurable quantity from an electrical signal [12,13]. An optoelectronic sensor is the next generation of this kind that combines both functions in one device by activating the surface of the photodetector to measure variations in the parameters of interest in the surrounding medium [14][15][16]. A further development of these devices is the customization of their performance and range for specific applications.…”

Section: Introductionmentioning

confidence: 99%

“…For example, atmospheric quality monitoring (mainly for gas content) involves very tiny changes in the refractive index close to unity with a resolution of 10 −4 RIU [17,18]. Monitoring changes in environments with gases at high pressure or containing organic vapors requires a wide dynamic range to cover their highvalue refractive indices compared to the refractive index of air [15,18]. These different situations must be taken into account in the sensor design, while the characteristics of the plasmonic resonance is spatially (long-and short-range SPRs) and spectrally (narrow and wide) controlled [19,20].…”

Section: Introductionmentioning

confidence: 99%

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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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