Publications by authors named "Xinye Fan"

Article Synopsis
  • The study introduces a new metastructure made of silicon nanoblock tetramer clusters aimed at enhancing surface sensing capabilities by utilizing polarization-independent properties through bound states in the continuum (BICs).
  • Three quasi-BIC modes were identified at specific wavelengths, achieving high sensitivity and quality factors, confirming the effectiveness of the design for precision sensing applications.
  • The research utilized advanced simulation methods to explore electromagnetic field behaviors and demonstrated the system's robustness and performance through experimental verification involving varying concentrations of CaCl solutions.
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Article Synopsis
  • The all-dielectric metasurface shows promise as an innovative platform for creating effective optical sensors, particularly utilizing Fano resonances.
  • A specific sensor design using a hollow herringbone metasurface demonstrates high sensitivity for both temperature and refractive index measurements, with impressive simulation results indicating a Q factor of 2.6 × 10 and a sensitivity of 232 nm/RIU.
  • Experimental results confirm these findings, yielding a Q factor of 5366 and a sensitivity of 178 nm/RIU, which enhances the potential use of these sensors in biochemical analysis and environmental monitoring.
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Anomalous thermal behaviors of excitonic luminescence in CsPbBr perovskite quantum dots (PQDs) were observed. It is found that the main luminescence peak originated from the excitonic radiative recombination assisted by the longitudinal-optical (LO) phonon, and its integrated intensity first declines as the temperature varies from 10 to 150 K and then turns to increase at ∼160 K, reaching a maximum value at 300 K. A model considering the thermal detrapping and transfer of electrons from a trap level is developed to interpret these abnormal thermal behaviors of the luminescence from the PQDs.

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Article Synopsis
  • * Key advancements include improvements in substrate pretreatment, p-type doping, and innovative structures like nano-LEDs and quantum dot LEDs, focusing on enhancing luminous efficiency across different colors.
  • * Micro-LED technology, derived from group-III nitride LEDs, is gaining attention as a new display device, with nano-LEDs expected to lead future developments in energy-efficient and environmentally friendly displays.
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Article Synopsis
  • - The article discusses an innovative "H"-shaped silicon disk metasurface that can measure temperature and refractive index (RI) effectively.
  • - It features three unique Fano resonances with high modulation depth and quality factor, achieved through the introduction of asymmetry parameters.
  • - The sensor demonstrates impressive sensitivity, with 262 nm/RIU for RI changes and 59.5 pm/k for temperature fluctuations, paving the way for advanced sensor design.
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Article Synopsis
  • A new highly sensitive sensor, called the silicon nanorod and symmetric rings (SNSR), utilizes three Fano resonances in the near-infrared range by leveraging quasi-bound states in the continuum (Q-BICs) and optimizing its geometric structure.
  • The sensor demonstrates exceptional performance with a maximum Q-factor of 7427 and impressive sensitivity of 474 nm/RIU, with a figure of merit (FOM) reaching 3306 RIU.
  • Experimental evaluations reveal a sensitivity of 295 nm/RIU, a Q-factor of 850, and an FOM of 235 RIU, making the SNSR structure an innovative tool for applications in biomedical sensing and multi-target detection in optics.
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A multi-function sensor based on an all-dielectric metastructure for temperature and refractive index sensing simultaneously is designed and analyzed in this paper. The structure is composed of a periodic array of silicon dimers placed on the silicon dioxide substrate. By breaking the symmetry of the structure, the ideal bound states in the continuum can be converted to the quasi-bound states in the continuum, and three Fano resonances are excited in the near-infrared wavelength.

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Fano resonance with high Q-factor is considered to play an important role in the field of refractive index sensing. In this paper, we theoretically and experimentally investigate a refractive index sensor with high performance, realizing a new approach to excite multiple Fano resonances of high Q-factor by introducing an asymmetric parameter to generate a quasi-bound state in the continuum (BIC). Combined with the electromagnetic properties, the formation mechanism of Fano resonances in multiple different excitation modes is analyzed and the resonant modes of the three resonant peaks are analyzed as toroidal dipole (TD), magnetic quadrupole (MQ), and magnetic dipole (MD), respectively.

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Article Synopsis
  • This study explores Fano resonances in a metastructure made of two pea-shaped cylinders, achieving a high quality factor (Q-factor) of 8183.7 at a specific wavelength (982.87 nm).
  • The research uses the finite-difference time-domain method to analyze electromagnetic fields, revealing that light is effectively confined and enhanced within the structure due to specific magnetic dipole responses.
  • Additionally, the metastructure shows promising sensing capabilities, with an optical refractive index sensor achieving notable sensitivity and a high figure of merit, suggesting potential applications in fields like biosensing and optical devices.
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Article Synopsis
  • - This paper presents a novel all-dielectric metasurface built with a nanocube array on a silicon dioxide base that creates three Fano resonances by using asymmetric parameters to excite quasi-bound states in the near-infrared range.
  • - The excitement of these resonances is driven by magnetic and toroidal dipoles, showing significant electromagnetism characteristics, leading to effective performance as a refractive index sensor with high sensitivity (434 nm/RIU) and a Q factor of 3327.
  • - Experimental results confirm the metasurface's potential in various applications, including optical switches and biological sensors, with a maximum sensitivity of 227 nm/RIU and nearly 100% modulation depth observed at a specific wavelength.
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We have designed and analyzed the high quality-factor (Q-factor), multiple Fano resonances device on the basis of the all-dielectric metastructure. The unit structure consists of two rectangular air holes etched within a silicon cube and periodically aligns on the substrate of silicon dioxide. The results demonstrate that four Fano resonances are achieved by integrating the theory of bound states in the continuum (BIC)and breaking the symmetry (width symmetry or depth symmetry) of two rectangle air holes, and the resonant wavelength can be modified by altering structural parameters.

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We study the totally asymmetric simple exclusion process on multiplex networks, which consist of a fixed set of vertices (junctions) connected by different types of links (segments). In particular, we assume that there are two types of segments corresponding to two different values of hopping rate of particles (larger hopping rate indicates particles move with higher speed on the segments). By simple mean-field analysis and extensive simulations, we find that, at the intermediate values of particle density, the global current (a quantity that is related to the number of hops per unit time) drops and then rises slightly as the fraction of low-speed segments increases.

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Hybrid integrated photodetectors with flat-top steep-edge spectral responses that consist of an Si-based multicavity Fabry-Perot (F-P) filter and an InP-based p-i-n absorption structure (with a 0.2 μm In(0.53)Ga(0.

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