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
Optics
Long Cheng, Fabio Formisano, Kirill A. Grishunin, Sergey D. Gorelov, Paul H. M. van Loosdrecht, Jian Yan, Xuan Luo, Zhigao Sheng, Evgeny A. Mashkovich
Summary: This study demonstrates the efficient induction of the quadratic electro-optic effect (Kerr effect) by a terahertz (THz) electric field in the quasi-two-dimensional material MnPS3. The findings suggest that MnPS3 has the potential to be a promising candidate for practical applications in future ultrafast electro-optical devices.
Article
Optics
Zhangwei Ma, Jintao Chen, Heming Wei, Liang Zhang, Zhifeng Wang, Zhenyi Chen, Fufei Pang, Tingyun Wang
Summary: The study introduces and experimentally validates a sapphire-derived fiber and silica capillary-based compound Fabry-Perot interferometer for high-pressure and high-temperature sensing. Experimental results show that the FPI has a linear response to applied pressure at different temperatures, demonstrating excellent repeatability.
Article
Optics
Zhang-Lang Lin, Pavel Loiko, Huang-Jun Zeng, Wen-Ze Xue, Ge Zhang, Simone Normani, Patrice Camy, Valentin Petrov, Xavier Mateos, Haifeng Lin, Haohai Yu, Huaijin Zhang, Junhai Liu, Li Wang, Weidong Chen
Summary: We present a Kerr-lens mode-locked laser utilizing an Yb3+-doped disordered calcium lithium niobium gallium garnet (Yb:CLNGG) crystal. By pumping with a spatially single-mode Yb fiber laser at 976nm, the Yb:CLNGG laser generates soliton pulses with a duration of 31 fs at 1056.8nm, achieving an average output power of 66mW and a pulse repetition rate of approximately 77.6MHz via soft-aperture Kerr-lens mode-locking. The Kerr-lens mode-locked laser reaches a maximum output power of 203mW for slightly longer pulses of 37fs at an absorbed pump power of 0.74W, corresponding to a peak power of 62.2kW and an optical efficiency of 20.3%.
Article
Optics
Joao P. Santos, Joerg Bierlich, Jens Kobelke, Marta S. Ferreira
Summary: A fiber sensor based on a balloonlike silica capillary is proposed and demonstrated for simultaneous measurement of displacement and temperature. The sensor configuration with a hollow-core fiber and a balloon shape enhances the sensing performance. It provides high sensitivity to displacement and temperature, and is cost-effective with a simple fabrication process.
Article
Optics
Fujun Sun, Yan Yang, Zhihua Li, Daquan Yang, Huiping Tian, Chengkuo Lee
Summary: We present the characteristics of disturbed spatial modes in a multi-mode photonic crystal nanobeam cavity (PCNC) in the mid-infrared wavelength range through numerical and experimental methods. The resonance wavelength of the spatial modes can be controlled by modifying the size, period, and position of the central periodical mirrors in PCNC, leading to better utilization of the spectrum resource. Moreover, we investigate the side coupling characteristics of PCNC supporting both air and dielectric modes for the first time. This work serves as a proof of design method for flexible control of spatial modes in PCNC, enabling the realization of integrated multi-function devices in a limited spectrum range.
Article
Optics
Philippe Delaye, Tao Liu, Ewan Mer, Maha Bouhadida, Sylvie Lebrun
Summary: The paper describes the experimental observation of emission of photon pairs through four-wave mixing (FWM) in a silica nanofiber, achieving high coincidence to accidental ratio (CAR) and high pair emission rate despite the presence of residual Raman spontaneous scattering. The photon pairs are observed with either a single-longitudinal-mode source or a multimode source, with the emission rate increasing by a factor of 2 with the multimode source.
Article
Optics
Hugo Uittenbosch, Oliver Kliebisch, Raoul-Amadeus Lorbeer, Peter Mahnke
Summary: We propose a modified version of a two-arm, two-color, single second harmonic generation heterodyne dispersion interferometer, which reduces the number of optical elements and employs digital in-phase and quadrature demodulation for phase shift retrieval from a single photodetector signal. The system noise and drift are analyzed by measuring the Allan deviation. The device is tested for relative atmospheric pressure measurement and achieves a deviation of less than 150 Pa with an error estimation.
Article
Optics
Clement Deleau, Han Cheng Seat, Olivier Bernal, Frederic Surre
Summary: In this study, a high-sensitivity integrated silicon nitride long period grating (LPG) refractometer based on a rib waveguide with sinusoidally modulated width is demonstrated. The sensor exhibits a very high refractometric sensitivity that remains constant over a broad spectral range and also has low temperature sensitivity and a simple fabrication process. These results demonstrate the feasibility of achieving both high sensitivity and a large dynamic range of the proposed refractometer through chip-scale photonic integration.
PHOTONICS RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
William O. F. Carvalho, E. Moncada-Villa, Osvaldo N. Oliveira Jr, J. R. Mejia-Salazar
Summary: By utilizing diffracted waves from dielectric-magnetic optical grating ribs to excite guided modes in high-refractive-index planar waveguides, a large enhancement of the transverse magneto-optical Kerr effect (TMOKE) in the transmission mode is demonstrated, providing efficient, integrated, and low-loss magneto-optical devices with potential applications in high-resolution sensing/biosensing.
Article
Optics
Feng Zhou, Cacere Jelah Nieva, Dianyuan Fan, Shunbin Lu, Wei Ji
Summary: This study reveals key insights into the optical Kerr effect (OKE) associated with 2D excitons and presents a concise formalism for predicting the nonlinear refractive index of 2D materials. The research shows that the OKE value of 2D materials is four orders of magnitude larger than bulk semiconductors, and identifies the 2D layered perovskite with the highest OKE efficiency at 1550 nm wavelength.
PHOTONICS RESEARCH
(2022)
Article
Optics
Ziting Lin, Riqing Lv, Yong Zhao, Hongkun Zheng, Xixin Wang
Summary: This study presents a special open-cavity Mach-Zehnder salinity sensor with advantages in salinity sensitivity and loss, making it a potential online monitor of ocean salinity and providing a low-cost way to construct an open cavity.
Article
Optics
Haotian Zhang, Xiaoping Li, Hongzhong Cao, Yue Pan, Wendi Wu, Yunjie Xia, Rende Ma
Summary: This study utilizes hyperspectral measurement to investigate the refractive index of aqueous samples and the effect of dispersion on ultra-sensitive interferometers. Through the generation of hyperspectral data in the near-infrared region using a wavefront splitting fiber Mach-Zehnder interferometer, the refractive index of saline water is measured, and empirical dispersion equations are fitted. By considering both normal and abnormal dispersion, the theoretical sensitivity of phase compensated WFSF-MZI is in agreement with experimental results, providing a reference for designing dispersion sensitized optical refractive index sensors for detecting aqueous samples.
Article
Optics
Cheng-Chih Hsu, Shih-Han Hung, Yu-Hsuan Lin, Min-Rui Wu
Summary: A reliable glucose concentration measurement system was proposed, which consisted of a circular heterodyne polarimeter and a reusable enzymatic sensor for determining glucose concentrations in aqueous solutions and human serum. The system offers high accuracy and stability, and the enzymatic sensor can be reused multiple times under optimal conditions.
Article
Optics
Yuan He, Xiaoyan Li, Jie Li, Jing Huang, Hao Zhu, Yi Feng, Qian Yi, Wei Hu, Lili Miao, Chujun Zhao
Summary: This study experimentally reports the wavelength-dependent third-order optical nonlinearity of two-dimensional halide organic-inorganic perovskite (PEA)2PbI4 film. The film exhibits ultrafast optical response and large third-order optical nonlinearities, making it significant for developing optoelectronic devices.
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
Physics, Multidisciplinary
A. Boyer, M. Herve, V Despre, P. Castellanos Nash, V Loriot, A. Marciniak, A. G. G. M. Tielens, A. Kuleff, F. Lepine
Summary: The study reveals that excited cations in PAHs relax through a progressive loss of vibrational selectivity created at the early-stage dynamics, which competes with the recently revealed correlation-band dynamics.
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
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
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.
Proceedings Paper
Engineering, Electrical & Electronic
V Loriot, A. Marciniak, S. Nandi, G. Karras, M. Herve, E. Constant, E. Plesiat, A. Palacios, F. Martin, F. Lepine
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
A. Boyer, M. Herve, V Despre, P. Castellanos Nash, V Loriot, A. Scognamiglio, G. Karras, R. Bredy, E. Constant, A. G. G. M. Tielens, A. Kuleff, F. Lepine
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC)
(2021)
Article
Chemistry, Physical
Alexie Boyer, Marius Herve, Audrey Scognamiglio, Vincent Loriot, Franck Lepine
Summary: Studying ultrafast processes induced by energetic radiation is essential for understanding the evolution of molecules under extreme excitation conditions. Time-resolved experiments are needed to follow the dynamics induced by light absorption in real time. Recent research has shown that the dynamics of diamondoid carbon cages is driven by two different timescales.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Optics
V. Loriot, A. Marciniak, S. Nandi, G. Karras, M. Herve, E. Constant, E. Plesiat, A. Palacios, F. Martin, F. Lepine
JOURNAL OF PHYSICS-PHOTONICS
(2020)
Article
Optics
Junyang Ma, H. Zhang, B. Lavorel, F. Billard, J. Wu, C. Boulet, J. -M. Hartmann, O. Faucher
