Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
Surface plasmon resonance (SPR) technology has been widely applied in various fields, such as biosensing, environmental monitoring, food safety, and drug screening. However, the signal-to-noise ratio (SNR) of SPR sensors varies with wavelength and greatly affects their performance due to the fact that optics and sensors work differently for varying wavelengths of light. To address this issue, this paper proposes a simple and effective spectral shaping method based on a multi-field-of-view spectrometer combined with a mask. The amount of light received by the sensor is controlled by the mask, which provides uniform spectral intensity at different wavelengths of the SPR and improves the consistency of measurement accuracy. The results show that the spectral shaping method using the mask can reduce the difference in SNR at different resonance wavelengths by about 70% and reduce the difference in measurement accuracy by about 85%. Moreover, the method is expected to facilitate the wider application of SPR technology in more fields due to its low cost and positive effects.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/AO.561182 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Sub-1 cm-1 high-resolution broadband sum-frequency generation vibrational spectroscopy (HR-BB-SFG-VS) with significantly improved sensitivity and signal-to-noise ratio (SNR).
J Chem Phys
September 2025
Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang Province 310027, China.
Sum-frequency generation vibrational spectroscopy (SFG-VS) has been well-established as a unique spectroscopic probe to interrogate the structure, interaction, and dynamics of molecular interfaces, with sub-monolayer sensitivity and broad applications. Sub-1 cm-1 High-Resolution Broadband SFG-VS (HR-BB-SFG-VS) has shown advantages with high spectral resolution and accurate spectral line shape. However, due to the lower peak intensity for the long picosecond pulse used in achieving sub-wavenumber resolution in the HR-BB-SFG-VS measurement, only molecular interfaces with relatively strong signal have been studied.
View Article and Find Full Text PDFInfluence of grain size distribution type on statistical moments of ultrasonic attenuations and phase velocities in random polycrystals.
Ultrasonics
September 2025
Nantes Université, Ecole Centrale Nantes, CNRS, GeM, UMR 6183, F-44000 Nantes, France.
This study investigates the sensitivity of ultrasonic phase velocity and attenuation statistics to grain size distribution types, specifically monomodal and bimodal, in cubic finite-sized polycrystals with identical overall arithmetic or volumetric grain size statistics. A large ensemble of synthetic polycrystalline microstructures was generated, and their ultrasonic responses were computed using a modified spectral function method. The latter enables estimation of both effective phase velocities and attenuation coefficients while rigorously accounting for finite specimen dimensions and statistical variabilities across different samples.
View Article and Find Full Text PDFAuditory and cognitive contributions to recognition of degraded speech in noise: Individual differences among older adults.
PLoS One
September 2025
Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina, United States of America.
This study examined individual differences in how older adults with normal hearing (ONH) or hearing impairment (OHI) allocate auditory and cognitive resources during speech recognition in noise at equal recognition. Associations between predictor variables and speech recognition were assessed across three datasets that each included 15-16 conditions involving temporally filtered speech. These datasets involved (1) degraded spectral cues, (2) competing speech-modulated noise, and (3) combined degraded spectral cues in speech-modulated noise.
View Article and Find Full Text PDFLET measurements in proton and helium-ion beams of therapeutic energies using a silicon pixel detector towards a tool for quality assurance.
Med Phys
September 2025
Heidelberg Institute for Radiation Oncology (HIRO), National Center for Research in Radiation Oncology (NCRO), Heidelberg, Germany.
Background: As advanced treatment plans increasingly include optimizing both dose and linear energy transfer (LET), there is a growing demand for tools to measure LET in clinical settings. Although various detection systems have been investigated in this pursuit, the scarcity of detectors capable of providing per-ion data for a fast and streamlined verification of LET distributions remains an issue. Silicon pixel detector technology bridges this gap by enabling rapid tracking of single-ion energy deposition.
View Article and Find Full Text PDFModeling the emission spectra and radiative decay rates in polychlorinated organic radicals.
Phys Chem Chem Phys
September 2025
Nantes Université, CNRS, CEISAM UMR 6230, F-44000 Nantes, France.
Owing to their unique combination of magnetic and optical properties, luminescent polychlorinated radicals are promising candidates for advanced applications in both optoelectronics and quantum technologies. In this study, we employ the lineshape formalism within a computational protocol based on time-dependent density functional theory (TD-DFT) to investigate the excited-state properties of six representative members of this family presenting different sizes and excited-state characters. We explore a wide range of density functionals, applying or not the Tamm-Dancoff approximation (TDA), combined with different vibronic models, namely, the vertical gradient (VG), vertical Hessian (VH), and adiabatic Hessian (AH), as well as dipole moment expansions using the Franck-Condon (FC) and Herzberg-Teller (HT) approximations.
View Article and Find Full Text PDF