Silicon Ultraviolet High-Q Plasmon Induced Transparency for Slow Light and Ultrahigh Sensitivity Sensing

Wang, Yajun; Luo, Guang-Li; Yan, Zhendong; Wang, Jinpeng; Tang, Chaojun; Liu, Fanxin; Zhu, Mingwei

doi:10.1109/jlt.2023.3305875

Cited by 20 publications

(3 citation statements)

References 62 publications

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“…SPR is an analytical tool for real-time detection in which an optical signal is proportional to the concentration of an analyte capable of specific binding [ 5 , 6 ]. Therefore, SPR has been used to sense biomolecules such as nucleic acids and proteins on the nanomolar scale [ 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Surface-Plasmon-Resonance Amplification of FMD Detection through Dendrimer Conjugation

Jung,

Park

2024

Sensors

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The amplification of the surface plasmon resonance (SPR) sensitivity for the foot-and-mouth disease (FMD) detection was studied using Poly(amidoamine) (PAMAM) succinamic-acid dendrimers. The dendrimers were conjugated with the complementary annealed with the aptamers capable of binding specifically to FMD peptides. The tethered layer of the dendrimer-conjugated double-stranded(ds)-aptamers was formed on the SPR sensor Au surface via a thiol bond between the aptamers and Au. After the tethered layer was formed, the surface was taken out of the SPR equipment. Then, the ds-aptamers on the surface were denatured to collect the dendrimer-conjugated single-stranded(ss)-complementary. The surface with only the remaining ss-aptamers was transferred again to the equipment. Two types of the injections, the FMD peptide only and the dendrimer-conjugated ss-complementary followed by the FMD peptides, were performed on the surface. The sensitivity was increased 20 times with the conjugation of the dendrimers, but the binding rate of the peptides became more than two times slower.

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Section: Introductionmentioning

confidence: 99%

Surface-Plasmon-Resonance Amplification of FMD Detection through Dendrimer Conjugation

Jung,

Park

2024

Sensors

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“…In addition, the interband plasmonic nature of the crystalline silicon (c-Si) material near the DUV wavelength regime would enable strong surface plasmon resonance to achieve the modal phase matching in the silicon metasurface operating in the DUV. 61,62 In this work, we demonstrate a modal phase-matched BIC metasurface made of a c-Si metasurface fabricated on a sapphire substrate, which can produce coherent DUV light via THG. Symmetry breaking is introduced in the lattice structure of our design to acquire highly efficient BIC resonance and high Q-factor.…”

mentioning

confidence: 99%

“…It can be achieved by tailoring the metasurface geometries to achieve precise overlapping of different optical modes at the fundamental and harmonic wavelengths to boost the nonlinear generation efficiency. − This progress has provided strong solutions for designing compact and efficient nonlinear optical devices. In addition, the interband plasmonic nature of the crystalline silicon (c-Si) material near the DUV wavelength regime would enable strong surface plasmon resonance to achieve the modal phase matching in the silicon metasurface operating in the DUV. , …”

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confidence: 99%

Modal Phase-Matched Bound States in the Continuum for Enhancing Third Harmonic Generation of Deep Ultraviolet Emission

Abdelraouf,

Anthur,

Wang

et al. 2024

ACS Nano

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Coherent deep ultraviolet (DUV) light sources are crucial for various applications such as nanolithography, biomedical imaging, and spectroscopy. DUV light sources can be generated by using conventional nonlinear optical crystals (NLOs). However, NLOs are limited by their bulky size, inadequate transparency at the DUV regime, and stringent phasematching requirements for harmonic generation. Recently, dielectric metasurfaces support high Q-factor resonances and offer a promising approach for efficient harmonic generation at short wavelengths. In this study, we demonstrated a crystalline silicon (c-Si) metasurface simultaneously exciting modal phase-matched bound states in the continuum (BIC) resonance at the fundamental wavelength of 840 nm with a higher degree of freedom for precise control of the BIC resonance and a plasmonic resonance at the wavelength of 280 nm in the DUV to enhance third harmonic generation (THG). We experimentally achieved a Q-factor of ∼180 owing to the relatively large refractive index of the c-Si and the geometric symmetry breaking of the structure. We realized THG at a wavelength of 280 nm with a power of 14.5 nW by using a peak power density of 15 GW/cm 2 excitation. The measured THG power is 14 times higher than the state-of-the-art THG dielectric metasurfaces using the same peak power density in the DUV regime, and the maximum obtained THG power enhancement factor is up to 48. This approach relies on the significant third-order nonlinear susceptibility of c-Si, the interband plasmonic nature of the c-Si in the DUV, and the strong field confinement of BIC resonance to boost overall nonlinear conversion efficiency to 5.2 × 10 −6 % in the DUV regime. Our work shows the potential of c-Si BIC metasurfaces for developing efficient and ultracompact DUV light sources using high-efficacy nonlinear optical devices.

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Dynamically Tunable Terahertz Multiple Plasmon‐Induced Transparency and Slow Light in Planar Metamaterials With Rectangular Interrupted Graphene

Wang,

Yan

et al. 2024

Int J of Quantum Chemistry

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A novel planar monolayer graphene metamaterial structure containing rectangular interrupted graphene is proposed. Dynamically tunable multiple plasmon‐induced transparency (PIT) and slow light are obtained within the terahertz band through destructive interference between continuous dark and interrupted bright modes. Two distinct graphene types function as the optical dark and bright modes, and continuous graphene array is the nonradiative dark mode, whereas interrupted graphene array is the broad linewidth bright mode, respectively. Given the existence of graphene structure in the continuous state, continuous graphene Fermi level is dynamic tuned through the simple use of the bias voltage. Expressions of n‐order coupled mode theory (CMT) are correctly deduced, with CMT fitting theoretical analysis being identical to finite‐difference time‐domain numerical simulation based on dual‐ and triple‐PIT results for n = 3 and n = 4 cases, respectively. The continuous graphene Fermi level increases within 0.7–1.1 eV; the group index of the dual‐PIT system is maintained within 475.1–801.6, while that of the triple‐PIT system is 583.3–886.3. Additionally, the maximal group index is as high as 886.3 at 1.1 eV, indicating that an outstanding slow light device is established. Consequently, these proposed structures and research outcomes can guide the design of multichannel optical filters, excellent slow light devices, and dynamically tunable optical modulators.

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Silicon Ultraviolet High-Q Plasmon Induced Transparency for Slow Light and Ultrahigh Sensitivity Sensing

Cited by 20 publications

References 62 publications

Surface-Plasmon-Resonance Amplification of FMD Detection through Dendrimer Conjugation

Surface-Plasmon-Resonance Amplification of FMD Detection through Dendrimer Conjugation

Modal Phase-Matched Bound States in the Continuum for Enhancing Third Harmonic Generation of Deep Ultraviolet Emission

Dynamically Tunable Terahertz Multiple Plasmon‐Induced Transparency and Slow Light in Planar Metamaterials With Rectangular Interrupted Graphene

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