Article
Multidisciplinary Sciences
Xiaodong Liu, Xin Ge, Jing Cao, Yi Xiao, Yan Wang, Wei Zhang, Ping Song, Weilin Xu
Summary: This study investigated the catalysis of Pt SAC at the single-molecule single-atom level and found both static and dynamic activity heterogeneity. It was revealed that the intrinsic catalytic activity of Pt SAC is higher than that of Pt nanoparticles, and there is no catalysis-induced surface restructuring in Pt SAC. Density functional theory calculations further suggested that the unique catalytic properties of Pt SAC or the differences between Pt SAC and nanoparticles could be attributed to the strong adsorptions, large surface energy, and strong binding of Pt-1 species.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Spectroscopy
Wei-Hong Bi, Yun Jin, Yan-Tao Wang, Jia-Xin Li, Hai-Dong Zhang, Wa Jin, Guang-Wei Fu, Song Sun
Summary: This article proposed the use of ultraviolet and fluorescence spectroscopy to detect and study the polyps, ephyrae, and larvae of Aurelia at different growth stages. The results showed that the different growth stages of Aurelia had similar fluorescence distributions but different fluorescence intensities, and the UV absorption spectrum had absorption peaks in different UV light bands with different intensities. These spectral characteristics provide new ideas and methods for exploring the origin of Aurelia.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Chemistry, Multidisciplinary
Ryota Matsuoka, Shojiro Kimura, Tomoaki Miura, Tadaaki Ikoma, Tetsuro Kusamoto
Summary: Luminescent radicals are a new class of materials with unique photofunctions due to their open-shell electronic structure. Of particular interest are photofunctions where the radical's spin and luminescence are correlated, such as magnetoluminescence (ML), which can be useful in spin photonics. This study demonstrates that a covalently linked luminescent radical dimer can exhibit ML as a single-molecular property, providing insights into the requirements and mechanisms of ML in radicals and aiding the design of ML-active radicals through synthetic chemistry.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Emmanuel Schaan, Martin White
Summary: Line intensity mapping (LIM) is a rapidly emerging technique for constraining cosmology and galaxy formation using multi-frequency, low angular resolution maps. This technique relies on cross-correlations of line intensity maps to reveal astrophysical properties of the interstellar medium. The study clarifies the sources of luminosity scatter or line noise in LIM, and demonstrates that the effective number density of halos can in some cases exceed that of galaxies.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Optics
Gwiyeong Moon, Taehwang Son, Hajun Yoo, Changhun Lee, Hyunwoong Lee, Seongmin Im, Donghyun Kim
Summary: The interaction between single emitters and plasmonic structures can enhance optical properties but also causes distortion. By studying axially defocused images, the distortion can be explored and the precise positions of emitters can be retrieved, leading to improved localization accuracy.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Optics
Mohamed Touil, Rezki Becheker, Thomas Godin, Ammar Hideur
Summary: The study explores the potential of shaping spectral correlations by tuning parameters to track energy transfers within FOPO. By analyzing wavelength correlations, insights into spectrotemporal dynamics and correlation patterns are revealed, showcasing the versatility of fiber-optical sources in quantum optics applications.
Article
Engineering, Electrical & Electronic
Spyridon G. Kosionis, Vassilios Yannopapas, Emmanuel Paspalakis
Summary: We analyze the two-time intensity correlation function of a fluorescent field emitted by a three-level V-type quantum emitter near a two-dimensional periodic plasmonic nanostructure. The decay rates for a quantum emitter with different dipole orientations and the distance between the quantum emitter and the nanoparticle array lead to simulation of quantum interference effects. We demonstrate a strong modification of the two-time intensity correlation functions by studying specific physical parameters of the hybrid structure.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Physics, Multidisciplinary
Joseph W. Baron, Thomas Jun Jewell, Christopher Ryder, Tobias Galla
Summary: This article introduces the application of random matrix theory in deducing the eigenvalue spectrum of large matrices. By introducing an analytical method, the authors successfully studied the eigenvalue spectrum of random matrices with correlations and obtained a simple expression for the leading eigenvalue. The research results demonstrate that correlations between non-diagonal matrix elements have a significant impact on stability.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Chi Li, Mengxue Guan, Hao Hong, Ke Chen, Xiaowei Wang, He Ma, Aiwei Wang, Zhenjun Li, Hai Hu, Jianfeng Xiao, Jiayu Dai, Xiangang Wan, Kaihui Liu, Sheng Meng, Qing Dai
Summary: This research demonstrates coherent ultrafast photoemission from a single quantized energy level of a carbon nanotube, which has a narrow energy spread and the potential to achieve subangstrom spatial resolution and femtosecond temporal resolution for electron probe.
Article
Materials Science, Multidisciplinary
Clarisse Fournier, Kenji Watanabe, Takashi Taniguchi, Julien Barjon, Stephanie Buil, Jean-Pierre Hermier, Aymeric Delteil
Summary: The ability to identify and characterize homogeneous and inhomogeneous dephasing processes is crucial in solid-state quantum optics. A combination of resonant laser excitation and second-order photon correlations allows access to fast dynamics. The color center in hexagonal boron nitride experiences spectral diffusion at a characteristic time scale of tens of microseconds while emitting Fourier-limited single photons between spectral jumps.
Article
Materials Science, Multidisciplinary
A. Erpenbeck, E. Gull, G. Cohen
Summary: The method based on NCA can be used to calculate the full counting statistics of nonequilibrium quantum systems, revealing that correlations have a profound influence on higher-order cumulants.
Article
Physics, Multidisciplinary
Matias Bundgaard-Nielsen, Emil Vosmar Denning, Marco Saldutti, Jesper Mork
Summary: A stochastic interpretation of the standard rate equation model accurately computes the quantum intensity noise of a single-emitter nanolaser. By assuming that the emitter excitation and photon number are stochastic variables with integer values, this model extends the validity of rate equations and avoids the failure of the standard Langevin approach for few emitters. The model is validated by comparing it to full quantum simulations and provides insight into the fundamental nature of quantum noise in lasers.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Analytical
Takashi Anazawa, Motohiro Yamazaki, Shuhei Yamamoto, Ryoji Inaba
Summary: An ultra-small, highly efficient spectral-detection system was developed for detecting fluorescence from four emission points, allowing for highly sensitive and low-crosstalk seven-color detection. The system enables simultaneous quantification of up to seven fluorophores in each capillary, demonstrated through Sanger DNA sequencing and STR genotyping experiments.
Article
Biochemistry & Molecular Biology
Andrew H. A. Clayton
Summary: The dynamics of condensed matter can be studied using the time-dependent Stokes shift of a fluorescent probe. The time-dependent spectral correlation function is described by spectral relaxation correlation times that characterize the relaxation processes around the excited-state probe. Phasor plot is a powerful tool to analyze time and frequency-domain data, providing spatial maps of spectral dynamics in complex structures like living cells. The analysis workflow also addresses the extraction of initial and relaxed generalized polarization and improved methods for model discrimination and parameter extraction in complex spectral relaxation phenomena.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Physics, Multidisciplinary
Alessio Squarcini, Enzo Marinari, Gleb Oshanin, Luca Peliti, Lamberto Rondoni
Summary: This study investigates the stochastic behavior of the single-trajectory spectral density S(omega,T) of various Gaussian stochastic processes, such as Brownian motion, Ornstein-Uhlenbeck process, Brownian gyrator model, and fractional Brownian motion, in terms of frequency w and observation time T. The variance and frequency-frequency correlation of S(omega,T) are evaluated for different values of omega. The results demonstrate that these properties exhibit different behaviors for different physical cases, thus serving as a sensitive probe to distinguish between different types of random motion. These findings are of great importance in the analysis of experimental and numerical data.
NEW JOURNAL OF PHYSICS
(2022)
