Surface plasmon refractive index biosensors: A review of optical fiber, multilayer 2D material and gratings, and MIM configurations

Mahmud, Rabiul Al; Sagor, Rakibul Hasan; Khan, Mahfizur

doi:10.1016/j.optlastec.2022.108939

Cited by 33 publications

(14 citation statements)

References 109 publications

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“…This process can also be extended to complex structures that can enable unique optical phenomena such as printing chiral structures to unlock and control additional optical degrees of freedom . This highlights an exciting opportunity to use these resonances in applications where high sensitivities to changes in environmental RI are required and where the resonances can be switched between on and off states, such as in flexible optofluidic displays, biosensors, and tunable flat optics. − …”

Section: Discussionmentioning

confidence: 99%

TiO₂ Metasurfaces with Visible Quasi-Guided Mode Resonances via Direct Imprinting of Aqueous Nanocrystal Dispersions

Mallavarapu,

Lawrence,

Huang

et al. 2023

ACS Appl. Nano Mater.

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We report a room temperature, environmentally benign, water-based, single-step direct nanoimprint process to pattern dielectric metasurfaces using aqueous titanium dioxide (TiO2) nanocrystal (NC) inks, which are free of polymer additives or nonaqueous solvents typically used in nanofabrication. The metasurfaces are composed of TiO2 NC structures with a high refractive index of 1.94 ± 0.02 at 543 nm. TiO2 NC metasurfaces are designed to resonate at visible wavelengths and are fabricated as two-dimensional nanopillar gratings atop waveguides. Guided mode resonances within the waveguide couple to the overlaying gratings and scatter into free space, forming high quality (Q) factor quasi-guided mode (QGM) resonances. Electric and magnetic QGM resonances are observed, and their environmental refractive index sensitivities (S) are measured to be 69.1 and 70.4 nm/RIU, respectively, with a figure of merit (FOM) = Q × S > 3000. The use of water-based inks and the room temperature processing allow integration of TiO2 NC metasurfaces on rigid and flexible, polymeric substrates.

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Section: Discussionmentioning

confidence: 99%

TiO₂ Metasurfaces with Visible Quasi-Guided Mode Resonances via Direct Imprinting of Aqueous Nanocrystal Dispersions

Mallavarapu,

Lawrence,

Huang

et al. 2023

ACS Appl. Nano Mater.

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“…While propagating inside the optical fiber, the majority of the light stays inside the core, and only a few, termed evanescent waves, go outside to the cladding region. The penetration depth ( d p ) of the evanescent wave can be determined as follows: d p = λ / π n normalc normalo 2 .25em normals normali normaln 2 θ − n normalc normall 2 where the incident wavelength is λ, and the angle of incidence at the core-cladding interface is denoted by θ, while n co and n cl signify the refractive indices of the core and the cladding, respectively.…”

Section: Nanoplasmonic Biosensorsmentioning

confidence: 99%

Advancements and Perspectives in Optical Biosensors

Mostufa,

Rezaei,

Ciannella

et al. 2024

ACS Omega

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Optical biosensors exhibit immense potential, offering extraordinary possibilities for biosensing due to their high sensitivity, reusability, and ultrafast sensing capabilities. This review provides a concise overview of optical biosensors, encompassing various platforms, operational mechanisms, and underlying physics, and it summarizes recent advancements in the field. Special attention is given to plasmonic biosensors and metasurface-based biosensors, emphasizing their significant performance in bioassays and, thus, their increasing attraction in biosensing research, positioning them as excellent candidates for lab-on-chip and point-of-care devices. For plasmonic biosensors, we emphasize surface plasmon resonance (SPR) and its subcategories, along with localized surface plasmon resonance (LSPR) devices and surface enhance Raman spectroscopy (SERS), highlighting their ability to perform diverse bioassays. Additionally, we discuss recently emerged metasurface-based biosensors. Toward the conclusion of this review, we address current challenges, opportunities, and prospects in optical biosensing. Considering the advancements and advantages presented by optical biosensors, it is foreseeable that they will become a robust and widespread platform for early disease diagnostics.

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“…Their interesting properties include a large surface area and good charge transfer properties, which provide better performance and stability. The evanescent wave crossing through two media with different RIs, the gold chip and the 2D material, couples with the oscillations of the collective electrons, thus enhancing the SPR signal [ 87 , 88 ].…”

Section: Strategies For Signal Amplificationmentioning

confidence: 99%

Strategies for Surface Design in Surface Plasmon Resonance (SPR) Sensing

2023

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Surface plasmon resonance (SPR) comprises several surface-sensitive techniques that enable the trace and ultra-trace detection of various analytes through affinity pairing. Although enabling label-free, sensitive detection and real-time monitoring, several issues remain to be addressed, such as poor stability, non-specific adsorption and the loss of operational activity of biomolecules. In this review, the progress over sensor modification, immobilization techniques and novel 2D nanomaterials, gold nanostructures and magnetic nanoparticles for signal amplification is discussed. The advantages and disadvantages of each design strategy will be provided together with some of the recent achievements.

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Surface plasmon refractive index biosensors: A review of optical fiber, multilayer 2D material and gratings, and MIM configurations

Cited by 33 publications

References 109 publications

TiO₂ Metasurfaces with Visible Quasi-Guided Mode Resonances via Direct Imprinting of Aqueous Nanocrystal Dispersions

TiO₂ Metasurfaces with Visible Quasi-Guided Mode Resonances via Direct Imprinting of Aqueous Nanocrystal Dispersions

Advancements and Perspectives in Optical Biosensors

Strategies for Surface Design in Surface Plasmon Resonance (SPR) Sensing

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Surface plasmon refractive index biosensors: A review of optical fiber, multilayer 2D material and gratings, and MIM configurations

Cited by 33 publications

References 109 publications

TiO2 Metasurfaces with Visible Quasi-Guided Mode Resonances via Direct Imprinting of Aqueous Nanocrystal Dispersions

TiO2 Metasurfaces with Visible Quasi-Guided Mode Resonances via Direct Imprinting of Aqueous Nanocrystal Dispersions

Advancements and Perspectives in Optical Biosensors

Strategies for Surface Design in Surface Plasmon Resonance (SPR) Sensing

Contact Info

Product

Resources

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TiO₂ Metasurfaces with Visible Quasi-Guided Mode Resonances via Direct Imprinting of Aqueous Nanocrystal Dispersions

TiO₂ Metasurfaces with Visible Quasi-Guided Mode Resonances via Direct Imprinting of Aqueous Nanocrystal Dispersions