GST-Based Plasmonic Biosensor for Hemoglobin and Urine Detection

Sbeah, Zen; Adhikari, Rammani; Sorathiya, Vishal; Chauhan, Diksha; Rashed, Ahmad Nabih Zaki; Chang, Shih-Yu; Dwivedi, Ram Prakash

doi:10.1007/s11468-022-01728-2

Cited by 17 publications

(3 citation statements)

References 75 publications

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“…The fields of plasmonics and metasurfaces have significantly contributed to the development of highly responsive and selective IR sensors [10][11][12][13]. Geometrically tailored and subwavelength structures with desired electromagnetic responses can efficiently absorb infrared light at a desired wavelength with reduced full-width half maximum (FWHM).…”

Section: Introductionmentioning

confidence: 99%

Dual-Band and Spectrally-Selective Infrared Absorbers Based on Hybrid Gold-Graphene Metasurfaces

Alijabbari,

Karimzadeh,

Pakniyat

et al. 2024

Preprint

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In this paper, we propose a dual-band and spectrally-selective infrared (IR) absorber based on a hybrid structure comprising a patterned graphene monolayer and cross-shaped gold resonators within a metasurface. Rooted in full-wave numerical simulations, our study shows that the fundamental absorption mode of the gold metasurface hybridizes with the graphene pattern, leading to a second absorptive mode whose properties depend on graphene’s electrical properties and physical geometry. Specifically, the central operation band of the absorber is defined by the gold resonators whereas the relative absorption level and spectral separation between the two modes can be controlled by graphene’s chemical potential and its pattern, respectively. We analyze this platform using coupled-mode theory to understand the coupling mechanism between these modes and to elucidate the emergence and tuning of the dual band response. The proposed dual-band device can operate at different bands across the IR spectrum and may open new possibilities for tailored sensing applications in spectroscopy, thermal imaging, and environmental monitoring.

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Section: Introductionmentioning

confidence: 99%

Dual-Band and Spectrally-Selective Infrared Absorbers Based on Hybrid Gold-Graphene Metasurfaces

Alijabbari,

Karimzadeh,

Pakniyat

et al. 2024

Preprint

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“…Based on these characteristics, plasmonic nanocircuits and waveguides are considered as potential substitutes for dielectric photonic devices, in particular for matching nanoscale electronic devices for optoelectronic modulation 10 . Related plasmonic optoelectronic components, such as modulators 11 – 14 , filters 15 – 17 , switches 18 – 21 , circuits 8 , 22 – 25 , sensors 26 , have been demonstrated and reported.…”

Section: Introductionmentioning

confidence: 99%

Enhancing on/off ratio of a dielectric-loaded plasmonic logic gate with an amplitude modulator

Chang

Lin

Lee

et al. 2023

Sci Rep

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Plasmonic waveguides allow focusing, guiding, and manipulating light at the nanoscale and promise the miniaturization of functional optical nanocircuits. Dielectric-loaded plasmonic (DLP) waveguides and logic gates have drawn attention because of their relatively low loss, easy fabrication, and good compatibility with gain and active tunable materials. However, the rather low on/off ratio of DLP logic gates remains the main challenge. Here, we introduce an amplitude modulator and theoretically demonstrate an enhanced on/off ratio of a DLP logic gate for XNOR operation. Multimode interference (MMI) in DLP waveguide is precisely calculated for the design of the logic gate. Multiplexing and power splitting at arbitrary multimode numbers have been theoretically analyzed with respect to the size of the amplitude modulator. An enhanced on/off ratio of 11.26 dB has been achieved. The proposed amplitude modulator can also be used to optimize the performance of other logic gates or MMI-based plasmonic functional devices.

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“…[35][36][37] GST is selected as it exhibits high thermal stability, short tuning time (<30 ns), 38,39 and fast response time. As reported earlier, GST is employed in non-volatile 1 × 2 optical switching and multi-level memory, reversible all-optical switching, 40 tunable sensors, 41 tunable multichannel midinfrared optical filters, 42 biosensors to identify biomaterials including urine and hemoglobin, 43 programmable low-loss all-optical activation function devices, 44 and on-chip microphotonic wire switches. 45 In addition to this, GST-based photodetectors have been demonstrated to exhibit high responsivity, low dark current, and fast response time, [46][47][48] making them attractive to use in a variety of applications, including telecommunications, sensing, and imaging.…”

Section: Introductionmentioning

confidence: 99%

Simulation of waveguide integrated Ge2Sb2Te5-based tunable photodetector

Johari,

Naithani,

Kaur

et al. 2023

Opt. Eng.

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GST-Based Plasmonic Biosensor for Hemoglobin and Urine Detection

Cited by 17 publications

References 75 publications

Dual-Band and Spectrally-Selective Infrared Absorbers Based on Hybrid Gold-Graphene Metasurfaces

Dual-Band and Spectrally-Selective Infrared Absorbers Based on Hybrid Gold-Graphene Metasurfaces

Enhancing on/off ratio of a dielectric-loaded plasmonic logic gate with an amplitude modulator

Simulation of waveguide integrated Ge2Sb2Te5-based tunable photodetector

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