Article
Optics
Jianfu Wang, Suen Xin Chew, Shijie Song, Liwei LI, Linh Nguyen, Xiaoke Yi
Summary: In this study, cascaded silicon-on-insulator photonic crystal microring resonators (PhCMRRs) were designed, fabricated, and characterized for dual-parameter sensing based on a multiple resonances multiple modes (MRMM) technique. The engineered PhCMRRs, benefiting from the slow-light effect, exhibit unique optical field distributions with different sensitivities by exciting dielectric and air modes. The feasibility of simultaneous humidity and temperature extraction was demonstrated using a polymethyl methacrylate coating, and the sensitivities for relative humidity (RH) and temperature were obtained. Furthermore, the MRMM technique enriched the data and improved the sensor performance by enabling mutual cancellation of measurement errors.
Article
Environmental Sciences
Yifan Wang, Siyao Xiao, Yuhan Zhang, Howard Chang, Randall V. Martin, Aaron Van Donkelaar, Audrey Gaskins, Yang Liu, Pengfei Liu, Liuhua Shi
Summary: This study conducted a population-based cohort study to explore the associations between long-term exposure to major PM2.5 components and all-cause mortality among the elderly. The results showed that all five major PM2.5 components were significantly associated with elevated all-cause mortality, with combustion-related components having a greater impact.
ENVIRONMENT INTERNATIONAL
(2022)
Correction
Endocrinology & Metabolism
Costas P. Tsioufis, Dimitris L. Tsiachris, Maria N. Selima, Kyriakos S. Dimitriadis, Costas G. Thomopoulos, Dimitrios P. Tsilingiris, Aliki S. Gennadi, Dimitris C. Syrseloudis, Elli S. Stefanadi, Kostas P. Toutouzas, Ioannis E. Kallikazaros, Christodoulos I. Stefanadis
Summary: The study aimed to evaluate the impact of waist circumference on left-ventricular (LV) structural and functional alterations in hypertensive males and females. Results showed that waist circumference had a more pronounced effect on LV alterations in female hypertensive patients compared to males, suggesting routine measurement of waist circumference as an additional predictor of cardiac phenotype in women.
Article
Environmental Sciences
Wing Sze Chow, Kezheng Liao, X. H. Hilda Huang, Ka Fung Leung, Alexis K. H. Lau, Jian Zhen Yu
Summary: This study analyzed a 10-year dataset of PM2.5 chemical composition and source-specific tracers in an urban site in Hong Kong, China. The results showed a significant decline in PM2.5 and its major components, with those influenced by local vehicular emissions showing the steepest decline. Components impacted by regional transport and secondary formation had a smaller reduction, reflecting the complexity of their contributing sources and formation chemistry. Tracers for biomass burning also differed in their reduction extent, and dust components in PM2.5 decreased as well.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Optics
Haoran Gao, Xiefen Long, Xueying Jin, Xin Xu, Yang Lu, Huining Zhao, Liandong Yu
Summary: This paper describes a high-precision ranging method based on an optical balanced cross-correlation system and a single femtosecond laser. By adjusting the repetition rate of the laser, the measurement pulses can overlap with the reference pulses, allowing for the measurement of coaxial multiple target pulses without additional mechanical devices.
Review
Ophthalmology
Yu-Bai Chou, An-Guor Wang, Hsin-Yu Yang, Kuan-Jung Chen, Chang-Sue Yang
Summary: In this 17-year longitudinal study, a higher prevalence of myopia and astigmatism was observed in laser-treated threshold ROP eyes compared with age-matched control eyes. Myopia and astigmatism in laser-treated ROP eyes typically progress through adolescence after school age. Therefore, we recommend that preterm patients with laser-treated threshold ROP should attend regular follow-up not only for refractive status but also for structural change of anterior segment until their adolescence.
GRAEFES ARCHIVE FOR CLINICAL AND EXPERIMENTAL OPHTHALMOLOGY
(2022)
Article
Construction & Building Technology
Mohd Talib Latif, Doreena Dominick, Nor Syamimi Sufiera Limi Hawari, Anis Asma Ahmad Mohtar, Murnira Othman
Summary: During the MCO implemented by the Malaysian government, there were significant reductions in air pollutants such as PM10, PM2.5, NO2, and CO, with NO2 showing the largest decrease. O-3 concentrations at some stations increased, while NO2 and CO were significantly reduced during peak hours.
SUSTAINABLE CITIES AND SOCIETY
(2021)
Article
Optics
Shihua Zhang, Yingtian Lou, Yanjiang Zhou, Benyong Chen, Liping Yan
Summary: The study developed a two-color sinusoidal phase modulating interferometer based on an electro-optic modulator for self-correction of air refractive index in distance measurement. Experimental results indicated that using the two-color interferometer reduced drift compared to one-color interferometers in dynamic environments.
OPTICS COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Huijuan Yang, Meilong Le
Summary: This research focuses on the analysis of highly interconnected parts in the air transport network, revealing that the airline network tends to be a relatively small system with a few high-order communities, which can be characterized by geographical constraints.
APPLIED SCIENCES-BASEL
(2021)
Article
Environmental Sciences
Yongjoo Choi, Young Sung Ghim
Summary: The study investigated variations in major aerosol components using optical properties in a downwind area of metropolitan Seoul. Monthly changes in aerosol characteristics estimated from optical properties were mostly in line with previous studies based on in-situ measurement data, showing a decrease in aerosol optical depth along with reductions in mineral dust and secondary inorganic ions.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Biodiversity Conservation
Rituraj Neog
Summary: The study found that in 2020, most cities in India had a more comfortable climate, with a decrease in heat stress days and a decrease in days with heat stroke risk.
HUMAN AND ECOLOGICAL RISK ASSESSMENT
(2021)
Retraction
Environmental Sciences
Duo Wang, Chunyang Dong, Huihui Xu, Dong Xu, Yu Cheng, Yewen Shi, Fengchan Han, Feier Chen, Hailei Qian, Yangyang Ren, Shaofeng Sui, Jianghua Zhang
Summary: This study demonstrates that ambient pollutants and the chemical components and sources of PM2.5 were significantly associated with an elevated risk of pediatric outpatient visits for respiratory diseases and provides insights into the differential health risks of PM2.5 components.
ATMOSPHERIC ENVIRONMENT
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Dawei Ge, Shoufei Gao, Mingqing Zuo, Yuyang Gao, Yinging Wang, Baoluo Yan, Bing Ye, Dechao Zhang, Wei Ding, Han Li, Zhangyuan Chen
Summary: We propose a novel technique to measure Kerr nonlinearity in a hollow-core fiber based on nonlinear phase shift estimation by high-order QAM transmission. The measured nz,Ker, of the NANF-5 medium is <2.20 x 10(-23) m(2)/W.
2023 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION, OFC
(2023)
Retraction
Chemistry, Analytical
Yawen Cai, Xuemei Ren, Yue Lang, Zhiyong Liu, Pengfei Zong, Xiangke Wang, Shitong Yang
Summary: The retraction concerns the study conducted by Yawen Cai et al. on the sequestration and speciation of Eu(iii) on gamma alumina, focusing on the role of temperature and contact order.
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2022)
Article
Engineering, Electrical & Electronic
Yan Liping, Jiang Jianbo, Lou Yingtian, Chen Benyong, Xie Jiandong
Summary: This paper proposes an air refractive index measurement method that combines laser single-frequency interferometry and PTF sensing. The method overcomes the limitations of the Edlen equation in terms of sensor accuracies and integral interference fringe number determination. Experimental results show that the proposed method provides consistent results with the Edlen equation, with standard deviations of the differences in measurement results of 1.5 x 10(-8) and 2.3 x 10(-8) for 12 minutes and 1 hour, respectively.
LASER & OPTOELECTRONICS PROGRESS
(2023)
Article
Physics, Multidisciplinary
M. Herve, V Despre, P. Castellanos Nash, V Loriot, A. Boyer, A. Scognamiglio, G. Karras, R. Bredy, E. Constant, A. G. G. M. Tielens, A. Kuleff, F. Lepine
Summary: The study shows the universal role of correlation bands in ultrafast energy relaxation of size-scalable two-dimensional molecules following ionization by an ultrashort XUV pulse. It observed long lifetimes that nonlinearly increase with the number of valence electrons and proposed a general law based on solid-like electron-phonon scattering. This offers new opportunities in attosecond science and high-energy photophysics.
Article
Nanoscience & Nanotechnology
Maxime Duchet, Sorin Perisanu, Stephen T. Purcell, Eric Constant, Vincent Loriot, Hirofumi Yanagisawa, Matthias F. Kling, Franck Lepine, Anthony Ayari
Summary: Quantized nano-objects hold exciting potential for manipulating electrons and light, but so far no signature of quantized energy levels has been observed. Combining nanostructuring techniques with ultrashort laser pulses could pave the way for ultrafast electron emission manipulation and quantum optics experiments.
Article
Optics
J. Girardot, A. Coillet, M. Nafa, F. Billard, E. Hertz, Ph Grelu
Summary: In this study, the combination of evolutionary algorithm optimization and ultra-fast fiber laser technology has been used to generate self-generated stable two-soliton molecules with controllable temporal separation.
Article
Optics
J. Moreau, F. Billard, P. Bejot, E. Hertz
Summary: This paper reports on a complete temporal characterization method for femtosecond laser pulses, based on second-order interferometric autocorrelation and laser spectrum measurements. A newly developed autocorrelator is used, which generates a two-photon absorption signal directly within a camera sensor, providing a reliable and robust single-shot interferometric autocorrelation. The interferometric autocorrelation trace and laser spectrum are utilized for spectral phase retrieval using an evolutionary algorithm. The reliability of the method is confirmed by the quality of reconstruction for highly modulated spectral phases imprinted by a pulse shaper. The autocorrelator is compact, robust, and easy to use. Possible improvements are discussed.
OPTICS COMMUNICATIONS
(2022)
Article
Instruments & Instrumentation
E. Prost, V. Loriot, E. Constant, I. Compagnon, L. Berge, F. Lepine, S. Skupin
Summary: This study presents a THz platform using air plasma as a broadband source and air biased coherent detection for THz field. The setup is characterized by numerical simulations and measurements, confirming the effectiveness of the technique and demonstrating its application in THz spectroscopy of water vapor and a polystyrene sample.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Multidisciplinary Sciences
Alice Autuori, Dominique Platzer, Mariusz Lejman, Guillaume Gallician, Lucie Maeder, Antoine Covolo, Lea Bosse, Malay Dalui, David Bresteau, Jean-Francois Hergott, Olivier Tcherbakoff, Hugo J. B. Marroux, Vincent Loriot, Franck Lepine, Lionel Poisson, Richard Taieb, Jeremie Caillat, Pascal Salieres
Summary: This study presents a detailed investigation of the photoemission process in helium using a high-resolution attosecond electron interferometer. By decoding the complex dynamics related to angles, the complete formation of the photoionized wave packet is successfully reconstructed.
Article
Materials Science, Multidisciplinary
Renato Juliano Martins, Marlene Petit, Yoann Brule, Franck Billard, Edouard Hertz, Benoit Cluzel, Olivier Demichel
Summary: Managing thermal effects at the nanoscale is crucial for the efficiency and reliability of semiconductor nanostructures. This study demonstrates the coherent generation, control, and detection of acoustic phonons in silicon metasurfaces using femtosecond laser pulses and inelastic scattering spectroscopy.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Physical
Morgane Vacher, Alexie Boyer, Vincent Loriot, Franck Lepine, Saikat Nandi
Summary: In attosecond chemistry, isotope labeling is an effective tool for unraveling relaxation pathways in highly excited photoionized molecules. Through experiments and calculations, it was found that nuclear and electron-nuclear dynamics in ethylene were almost 40% faster compared to its deuterated counterpart.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Article
Physics, Multidisciplinary
Alexie Boyer, Saikat Nandi, Vincent Loriot
Summary: The natural diversity of molecules provides an excellent platform for studying electron dynamics, and recent Wigner time delay measurements have shed light on the behavior of electrons in molecules of different sizes. These measurements have helped identify the physical mechanisms behind photoionization processes and have revealed interesting trends in ionization time delays. Furthermore, studies on larger molecules have shown that photoionization metrology can reveal collective electron behaviors.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2023)
Article
Physics, Multidisciplinary
Emilien Prost, Vincent Loriot, Eric Constant, Isabelle Compagnon, Luc Berge, Franck Lepine, Stefan Skupin
Summary: This paper presents a two-color air plasma-based broadband THz generation and subsequent air-biased coherent detection (ABCD) of the THz field. Both the source and detection systems are characterized experimentally and numerically, showing excellent agreement between measured and simulated signals. It is found that accurately interpreting the experimental measurements requires modeling the entire optical setup, including various pump distortions, and considering geometrical effects in the ABCD scheme.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2023)
Article
Optics
Firas Trawi, Franck Billard, Olivier Faucher, Pierre Bejot, Edouard Hertz
Summary: This study demonstrates a method for storing, retrieving, and controlling light beams carrying orbital angular momentum (OAM) using gas-phase molecules. By encoding the spatial phase information into rotational coherences of molecules, the embedded spatial structure of the light beam can be restored on-demand. This method has significant implications for broadband coherent buffer memory, optical processing, versatile control of OAM fields, and a deeper understanding of molecular processes.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
M. Bournazel, J. Ma, F. Billard, E. Hertz, J. Wu, C. Boulet, J. -M Hartmann, O. Faucher
Summary: The Markov and secular approximations have been widely used to model decoherence in open quantum systems, but their applicability in intermolecular collisions in the time domain is still little explored. This study investigates the breakdown of these approximations in gas mixtures (HCl and CO2) under pressure using laser-induced molecular alignment technique. The findings not only provide detailed information on the collisional dissipation mechanisms, but also have potential practical applications in radiative heat transfer and climate studies. The approach tested for linear rotors can also be potentially applied to almost any gas mixture.
Article
Materials Science, Multidisciplinary
Franck Billard, Rishabh Sharma, Edouard Hertz, Olivier Faucher, Pierre Bejot
Summary: In this paper, a novel self-referenced method called TIGER is proposed for the complete temporal characterization of ultrashort optical pulses. The technique uses a second-order nonlinear signal generated by four time-delayed replicas of the input pulse, allowing for single shot measurement without the need for spectral measurements.
ADVANCED PHOTONICS RESEARCH
(2022)
Article
Optics
A. Dimitriou, V Loriot, A. Marciniak, T. Barillot, S. Danakas, F. Lepine, C. Bordas, S. Cohen
Summary: The nonlinear single and double ionization of Sr atoms induced by interaction with 800-nm laser pulses is experimentally investigated. The study reveals different ionization processes depending on the laser intensity, with a transition from multiphoton ionization to threshold ionization structures at higher intensities.
Article
Optics
Ilia Tutunnikov, Emilien Prost, Uri Steinitz, Pierre Bejot, Edouard Hertz, Franck Billard, Olivier Faucher, Ilya Sh Averbukh
Summary: A nonintrusive optical scheme for visualizing the rotational dynamics in anisotropic molecular gas is theoretically considered, utilizing ultrashort circularly polarized laser pulses and a vortex wave plate. The method allows determining the instantaneous orientation of the principal optical axes of the gas, and is promising for studying the dynamics of complex symmetric- and asymmetric-top molecules.
