The latest trends in nanophotonics

Kim, Minkyung; Park, Namkyoo; Lee, Hak‐Joo; Rho, Junsuk

doi:10.1515/nanoph-2022-0191

Cited by 8 publications

(4 citation statements)

References 25 publications

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“…Hence, researchers have paid much effort to enhance the SHEL via boosting the SOI in metamaterials or metasurfaces. [3,[14][15][16] For example, Luo et al have proposed the first unified description of SHEL by the spin redirection and Pancharatnam-Berry phases, and they have directly observed giant SHEL in a structured metamaterial. [17] In addition, the other long-standing issue is low efficiency, which has recently been solved by designing metamaterial or metasurfaces.…”

Section: Introductionmentioning

confidence: 99%

Wavelength‐Scale Spin Hall Shift of Light with Morphology‐Enhanced Scattering Efficiency from Nanoparticles

Sun

Gao

et al. 2022

Laser & Photonics Reviews

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Spin Hall (SH) shift of light from nanoparticles refers to the transverse displacement of scattered light due to spin–orbit interaction (SOI). Generally, the SH shift is small and suffers from inherent low scattering efficiency. In this paper, the SH shift and its corresponding scattering intensity are simultaneously enhanced for dual nanoparticles. Based on the generalized Lorentz‐Mie theory, the morphology of the nanoparticle is optimized to increase the scattering intensity while preserving the wavelength‐scale SH shift. The simultaneous enhancements are realized by manipulating the electric and magnetic dipolar modes to overlap at their resonances rather than the tails of the scattering. Meanwhile, a new pattern is identified on orbital momentum streamlines, revealing the near field's SOI. In addition, an experiment is proposed to detect the SH shifts in the far‐field observation plane. The scattering intensities from oblate spheroids are enhanced by one order of magnitude compared to the spherical counterparts. The findings may shed new light on the mechanism of light–matter interaction and facilitate the experimental detection of the SH effect of light.

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Section: Introductionmentioning

confidence: 99%

Wavelength‐Scale Spin Hall Shift of Light with Morphology‐Enhanced Scattering Efficiency from Nanoparticles

Sun

Gao

et al. 2022

Laser & Photonics Reviews

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“…Although many studies have reported the integration of miniaturized biosensors, it remains challenging to develop a fully integrated device in a robust, and user‐friendly format. [ 4 ] The smart integration of multiple miniaturized and advanced technological components that are related to micro/nanoelectronics, [ 5–6 ] nanophotonics, [ 7 ] microfluidics, [ 8–9 ] and functionalized transducing surface is required. [ 10 ]…”

Section: Introductionmentioning

confidence: 99%

“…Although many studies have reported the integration of miniaturized biosensors, it remains challenging to develop a fully integrated device in a robust, and userfriendly format. [4] The smart integration of multiple miniaturized and advanced technological components that are related to micro/nanoelectronics, [5][6] nanophotonics, [7] microfluidics, [8][9] and functionalized transducing surface is required. [10] In this context refractive-index-based (or refractometric) sensing systems have a great potential thanks to not only their high sensitivity, ease of use, rapid response and low cost, but also the possibility to perform label-free detection.…”

Section: Introductionmentioning

confidence: 99%

A Fully Integrated Miniaturized Optical Biosensor for Fast and Multiplexing Plasmonic Detection of High‐ and Low‐Molecular‐Weight Analytes

et al. 2023

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Optical biosensors based on plasmonic sensing schemes combine high sensitivity and selectivity with label-free detection. However, the use of bulky optical components is still hampering the possibility of obtaining miniaturized systems required for analysis in real settings. Here, a fully miniaturized optical biosensor prototype based on plasmonic detection is demonstrated, which enables fast and multiplex sensing of analytes with high-and low molecular weight (80 000 and 582 Da) as quality and safety parameters for milk: a protein (lactoferrin) and an antibiotic (streptomycin). The optical sensor is based on the smart integration of: i) miniaturized organic optoelectronic devices used as light-emitting and light-sensing elements and ii) a functionalized nanostructured plasmonic grating for highly sensitive and specific localized surface plasmon resonance (SPR) detection. The sensor provides quantitative and linear response reaching a limit of detection of 10 −4 refractive index units once it is calibrated by standard solutions. Analyte-specific and rapid (15 min long) immunoassay-based detection is demonstrated for both targets. By using a custom algorithm based on principal-component analysis, a linear dose-response curve is constructed which correlates with a limit of detection (LOD) as low as 3.7 μg mL −1 for lactoferrin, thus assessing that the miniaturized optical biosensor is well-aligned with the chosen reference benchtop SPR method.

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“…While this condition is valid in most instances except for tightly‐confined or near‐normal incidence, the spin Hall shift under the condition is essentially much smaller than

w_0

(Figure 1c) and breaking of the condition provides a route to increase the spin Hall shift substantially even up to

w_0/2

. Given that tremendous efforts have been devoted during the past decade to increasing the spin Hall shift from the deep‐subwavelength scale to several wavelengths and even beyond, [ 11–25 ] an approach to achieve polarization‐independent SHEL that is valid even when

w_0^2

is comparable to or less than

(\lambda \cot \theta _i/2\pi )^2

is in high demand (Figure 1d).…”

Section: Introductionmentioning

confidence: 99%

Incident‐Polarization‐Independent Spin Hall Effect of Light Reaching Half Beam Waist

Kim¹,

Lee²,

Rho

2022

Laser & Photonics Reviews

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The spin Hall effect of light (SHEL), a spin‐dependent transverse splitting of light at an optical interface, is intrinsically an incident‐polarization‐sensitive phenomenon. Recently, an approach to eliminate the polarization dependence by equalizing the reflection coefficients of two linear polarizations has been proposed, but is only valid when the beam waist is sufficiently larger than the wavelength. Here, it is demonstrated that an interface, at which the reflection coefficients of the two linear polarizations are the same and so are their derivatives with respect to the incident angle, supports the polarization‐independent spin Hall shift, even when the beam waist is comparable to the wavelength. In addition, an isotropic–anisotropic interface that exhibits the polarization‐independent spin Hall shift over the entire range of incident angles is presented. Monte‐Carlo simulations prove that spin Hall shifts are degenerate under any polarization and reach a half of beam waist under unpolarized incidence. An application of the beam‐waist‐scale SHEL as a tunable beam‐splitting device that is responsive to the incident polarization is suggested. The spin Hall shift that is independent of the incident polarization at any incident angle will facilitate a wide range of applications including practical spin‐dependent devices and active beam splitters.

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The latest trends in nanophotonics

Cited by 8 publications

References 25 publications

Wavelength‐Scale Spin Hall Shift of Light with Morphology‐Enhanced Scattering Efficiency from Nanoparticles

Wavelength‐Scale Spin Hall Shift of Light with Morphology‐Enhanced Scattering Efficiency from Nanoparticles

A Fully Integrated Miniaturized Optical Biosensor for Fast and Multiplexing Plasmonic Detection of High‐ and Low‐Molecular‐Weight Analytes

Incident‐Polarization‐Independent Spin Hall Effect of Light Reaching Half Beam Waist

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