Article
Engineering, Electrical & Electronic
Zhenning Tao, Yangyang Fan, Xiaofei Su, Ke Zhang, Chengwu Yang, Tong Ye, Jingnan Li, Hisao Nakashima, Takeshi Hoshida
Summary: Transceiver imperfections become the main impairment in advanced optical coherent communications as baud rate and modulation order increase. This study reviews the modeling, characterization, and measurement of linear imperfections in transceivers, and discusses the estimation and measurement methods for nonlinear imperfections. Linear imperfections are relatively well-understood, while nonlinear imperfections are more complex and require further investigation.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Gastroenterology & Hepatology
Yuzuru Tamaru, Toshio Kuwai, Akihiro Miyakawa, Noriyoshi Kanazawa, Ryusaku Kusunoki, Haruhisa Shimura, Shiori Uchiyama, Sauid Ishaq, Hiroshi Kohno
Summary: The use of a traction device in colorectal endoscopic submucosal dissection (ESD) can hasten the resection speed, especially in the proximal colon. It may also have potential benefits in the resection of large tumors.
AMERICAN JOURNAL OF GASTROENTEROLOGY
(2022)
Article
Chemistry, Multidisciplinary
Qing Wang, Yihao Zhou, Xun Zhao, Kyle Chen, Bingni Gu, Tao Yang, Haitao Zhang, Weiqing Yang, Jun Chen
Summary: Carbon is a fascinating element with diverse applications in materials and scientific disciplines. Tailoring carbon nanomaterials at the molecular scale remains a significant challenge due to its intrinsic structural and chemical stability. However, the development of a molecular scissor technology provides a new way to engineer carbon nanomaterials for various applications, including energy storage.
Article
Engineering, Electrical & Electronic
E. Raju, P. Jayaprakash, G. Vinitha, N. Saradha Devi, S. Kumaresan
Summary: The physical, optical, and mechanical properties of the organic conjugated chromophore 2-aminopyridinium malonate (2APM) single crystal were investigated, including crystal structure, fundamental vibration frequencies, band gap, microhardness, thermal stability, and third-order nonlinear optical response.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Optics
Xiong Shen, Zhe Si, Jingxin Zhu, Lei Lin, Lihua Bai, Jun Liu
Summary: The FASI device combines FROG and SRSI techniques to characterize few-cycle laser pulses with broad spectral range using third-order nonlinear effects. It is compact and versatile, capable of single-shot mode for well-compressed pulses and multi-shot mode for complex or large chirped pulses. Characterization of two few-cycle pulses centered at different wavelengths verified the device's ability as a powerful tool for broad spectral range few-cycle laser pulses characterization.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Optics
Khatereh Jafari, Mojtaba Golshani, Alireza Bahrampour
Summary: This paper studies a non-Gaussian discrete-modulated measurement-device-independent continuous-variable quantum key distribution protocol with a proposed quantum scissor at the receiver side. The quantum scissor, which truncates multiphoton number states and amplifies remaining photon number states, improves the fidelity and entanglement between two legitimate parties at long distances. However, this improvement disappears in high noisy channels.
Review
Cell Biology
Rahul Gupta, Arijit Ghosh, Rudra Chakravarti, Rajveer Singh, Velayutham Ravichandiran, Snehasikta Swarnakar, Dipanjan Ghosh
Summary: The discovery of CRISPR-Cas systems has revolutionized genetic alterations, with Cas13d showing high efficiency and specificity in cleaving targeted RNA in mammalian systems, making it a potential tool for RNA engineering and editing.
FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY
(2022)
Article
Chemistry, Inorganic & Nuclear
Yu-Ming Tseng, Jian-Hong Liao, Tzu-Hao Chiu, Hao Liang, Samia Kahlal, C. W. Liu, Jean-Yves Saillard
Summary: A new method for achieving nanocluster-to-nanocluster transformation was discovered through stepwise synthesis. The added dppm ligands altered the geometry of the nanoclusters and reduced the electron count from eight to two. The resulting compound exhibited strong yellow fluorescence at room temperature.
INORGANIC CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Hyo Young Choi, Heejoon Jo, Xiaobei Zhao, Katherine A. Hoadley, Scott Newman, Jeremiah Holt, Michele C. Hayward, Michael Love, J. S. Marron, D. Neil Hayes
Summary: The study proposes an unbiased and robust framework for discovering aberrant RNA transcript structures using shape changes in RNA-seq coverage data. This framework allows for the independent discovery of known and novel variants without making assumptions about the underlying genetic mechanisms of abnormalities.
NATURE COMMUNICATIONS
(2021)
Article
Engineering, Chemical
Ines M. Goncalves, Ines Castro, Filipe Barbosa, Vera Faustino, Susana O. Catarino, Ana Moita, Joao M. Miranda, Graca Minas, Patricia C. Sousa, Rui Lima
Summary: The separation capacity of a multi-step crossflow microfluidic device was evaluated by using a blood analogue fluid and human red blood cells. The results showed that the device effectively separated the cells and the blood analogue fluid exhibited similar flow behavior to real blood, providing important data support for related research.
Article
Construction & Building Technology
Carlos J. Garcia-Mora, Jose Sanchez-Sanchez
Summary: This paper focuses on studying the techniques to automate the deployment process of deployable structures, proposing four deployment techniques and analyzing their applications on structures with straight rods and cylindrical shapes. By building and checking these applications, their behavior with respect to the theoretical model is verified.
AUTOMATION IN CONSTRUCTION
(2021)
Article
Computer Science, Information Systems
Mateus Nogueira, Erica da Cunha Ferreira, Pedro Tubenchlak Boechat, Felipe Assis, Estevao Rabello, Rafael Nascimento, Daniel Sadoc Menasche, Geraldo Xexeo, Abhishek Ramchandran, Katinka Wolter
Summary: This paper provides a large-scale characterization of device uptimes from the perspectives of a Reddit forum and Shodan. The study reveals that users have certain assumptions about device uptimes and that there are devices with uptimes exceeding a certain threshold, posing risks to users in terms of security and performance. Additionally, routers have the longest uptimes among devices, and compromised devices have a positive correlation with uptimes.
IEEE TRANSACTIONS ON EMERGING TOPICS IN COMPUTING
(2023)
Article
Chemistry, Analytical
Paulo Henrique Maciel Buzzetti, Maiara Mitiko Taniguchi, Nayara de Souza Mendes, Renata Correa Vicentino, Jean Halison de Oliveira, Bento Pereira Cabral Junior, Marcos de Souza, Johny Paulo Monteiro, Emerson Marcelo Girotto
Summary: In this study, a microfluidic device based on serial dilution was developed to generate nonlinear concentration gradients for dyes and biomolecules. The device was mathematically described and statistically validated, showing reproducibility in experiments and agreement with computational fluid dynamics simulation. The applicability of the device was demonstrated by coupling it with a surface plasmon resonance (SPR) biosensor, and the results were validated by fluorescence emissions.
Article
Engineering, Electrical & Electronic
Haoxiang Chen, Hao Jia, Tao Wang, Jianhong Yang
Summary: The paper introduces a gradient-oriented binary search method for photonic device design, which accelerates convergence speed and eliminates the need for additional binarization steps compared to direct binary search methods. By designing a bimodal interferometer and other devices, the universality and fast optimization speed of the method are verified.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Maria Elena Sanchez Vergara, Emiliano Toledo Dircio, Rafael Imanol Zubillaga Serrano
Summary: Novel heterostructures based on ferrocenium hexafluorophosphate, 2,6-dihydroxyanthraquinone or 2,6-diaminoanthraquinone, zinc phthalocyanine and nylon 11 were fabricated and characterized in terms of morphology, mechanical properties, optical parameters, and electrical behavior. The heterostructures showed promising potential for use in organic devices as an emitter layer and active layer.
Article
Optics
Giovanni Donati, Claudio R. Mirasso, Mattia Mancinelli, Lorenzo Pavesi, Apostolos Argyris
Summary: This study presents a detailed numerical investigation of the operation of a silicon microring resonator (MRR) in the presence of external optical feedback in a time delay reservoir computing scheme. The results demonstrate the versatility of the MRR in solving computing tasks with diverse memory requirements, where its nonlinearity and the photodetection nonlinearity can contribute to efficient computation.
Review
Chemistry, Multidisciplinary
Paolo Bettotti, Marina Scarpa
Summary: Nanocellulose has unique properties that make it a versatile material with possible applications in various fields, forming stable colloidal suspensions and soft hydrogels with interesting rheological properties. Recent research focuses on behavior, design, and interface modification of nanocellulose, emphasizing its applications in electronics, biomedical, textile, and printing technologies.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Optics
Stefano Biasi, Riccardo Franchi, Filippo Mione, Lorenzo Pavesi
Summary: Non-Hermitian physics in optics has provided a fertile ground for studying intriguing phenomena such as mode coalescence or exceptional points. In this study, we demonstrate a coherent interferometric excitation method that allows us to estimate both the real and imaginary parts of eigenvalues in optical microresonators. We also investigate the conditions for the merging of resonant doublets and the degeneracy splitting in one direction caused by non-Hermitian intermodal coupling.
PHOTONICS RESEARCH
(2022)
Article
Optics
Massimo Borghi, Lorenzo Pavesi
Summary: The researchers added additional spectral tunability to the source by tapering the waveguide width and controlling the delay between pump pulses, while inheriting all the distinctive metrics of the IFWM scheme. This feature allows for the recovery of spectral indistinguishability in the presence of fabrication errors.
Article
Optics
Stefano Biasi, Riccardo Franchi, Lorenzo Pavesi
Summary: This study theoretically demonstrates that interferometric excitation combined with a cavity ringdown method can be used to measure the ultimate quality factor (Q) of microresonators (MRs). Under suitable conditions, the resonant doublet merges into a single Lorentzian, allowing for typical exponential decay in the charging and discharging time of the MR to estimate its ultimate Q by measuring the photon lifetime.
Article
Materials Science, Multidisciplinary
Giole Piccoli, Matteo Sanna, Massimo Borghi, Lorenzo Pavesi, Mher Ghulinyan
Summary: Researchers have proposed a low-loss material platform based on silicon oxynitride (SiON), which exhibits significant linear and nonlinear optical characteristics in the infrared and near-infrared wavelength range. The platform demonstrates low propagation loss at visible wavelengths, enabling the realization of long and complex photon manipulation circuits and high-quality factor resonators. Additionally, the proposed SiON exhibits a high nonlinear refractive index, enhancing the efficiency of on-chip photon generation schemes.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Engineering, Electrical & Electronic
Davide Bazzanella, Stefano Biasi, Mattia Mancinelli, Lorenzo Pavesi
Summary: The nonlinear response of an optical microresonator is utilized in a time multiplexed reservoir computing neural network to solve linear and nonlinear logic operations, showcasing its memory and nonlinearity capabilities.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
Stefano Biasi, Riccardo Franchi, Davide Bazzanella, Lorenzo Pavesi
Summary: Local heating is widely used in integrated optics for trimming or tuning photonic components. This study demonstrates a simple two-layer feed-forward neural network based on thermally controlled Mach-Zehnder interferometers and microring resonators. It shows that the use of microheaters can limit the performance of the neural network. This work highlights the issue of thermal crosstalk in large thermally actuated integrated photonic circuits.
FRONTIERS IN PHYSICS
(2022)
Article
Optics
Emiliano Staffoli, Mattia Mancinelli, Paolo Bettotti, Lorenzo Pavesi
Summary: A small 4-channel time-delayed complex perceptron is used to compensate for chromatic dispersion in optical fiber links. The PNN device is experimentally tested with non-return-to-zero optical signals at 10 Gbps after propagation through up to 125 km optical fiber link. The testing shows that the excess losses introduced by the PNN device are compensated by the gain in the transmitted signal equalization for a link longer than 100 km, and the measured data are reproduced by a model that accounts for the optical link and the PNN device, suggesting improved performance and ease of use compared to the benchmark.
PHOTONICS RESEARCH
(2023)
Article
Optics
Riccardo Franchi, Stefano Biasi, Diego Piciocchi, Lorenzo Pavesi
Summary: This study introduces a novel non-Hermitian structure called the infinity-loop microresonator, which is based on a microresonator shaped as the infinity symbol twice coupled to a bus waveguide. It can achieve either high- or low-contrast unidirectional reflection and has negligible or identical reflection for counterpropagating light. The phase of the light propagating in the bus waveguide can be controlled to enable easy walking through the Riemann sheet, making it a tunable component for building more complex topological structures. Furthermore, the infinity-loop microresonator allows sensors that exhibit the features of both an exceptional point device and a diabolic point device simultaneously.
Proceedings Paper
Biochemical Research Methods
Ilya Auslender, Yasaman Heydari, Clara Zaccaria, Asiye Malkoc, Beatrice Vignoli, Lorenzo Pavesi
Summary: In this study, we present our optogenetic tool using a digital light processor (DLP) for light stimulation of neuronal culture, combined with a microelectrode array (MEA) system for sampling. The aim of this work is to develop an integrated experimental platform for studying the structure and function of neuronal networks. The proposed setup serves as an optogenetic tool for in-vitro experiments, allowing specific neuronal circuits to be addressed based on feedback from electrophysiological signals. The manuscript presents recent results from experiments involving optical stimulation and electrophysiological recording, as well as an AI-based model for reproducing the functionality and macro-structure of the cultured neurons.
OPTOGENETICS AND OPTICAL MANIPULATION 2023
(2023)
Proceedings Paper
Quantum Science & Technology
Nicola Massari, Yu Zou, Manuel Moreno Garcia, Luca Parmesan, Alessandro Tontini, Sonia Mazzucchi, Nicolo Leone, Stefano Azzini, Lorenzo Pavesi, Ingo Herrmann, Thomas Strohm
Summary: This paper demonstrates possible ways to design monolithic Quantum Random Number Generators in standard CMOS technology using silicon-based photon sources. The approach allows for integration, potential embedding in secure microprocessors, compact design, and a minimum event rate of about 1kHz.
QUANTUM TECHNOLOGIES 2022
(2022)
Proceedings Paper
Optics
Giovanni Donati, Apostolos Argyris, Claudio R. Mirasso, Mattia Mancinelli, Lorenzo Pavesi
Summary: Time-delay Reservoir Computing, implemented using a single silicon microring resonator subject to optical feedback, shows hardware simplicity and is capable of solving memory demanding tasks. Our research reveals the correlation between the nonlinearity of the microring resonator and the robustness to noise.
INTEGRATED OPTICS: DEVICES, MATERIALS, AND TECHNOLOGIES XXVI
(2022)
Proceedings Paper
Optics
Riccardo Franchi, Stefano Biasi, Filippo Mione, Lorenzo Pavesi
Summary: This study investigates the eigenvalues and eigenvectors of a taiji microresonator, showing that it operates at an exceptional point and has a higher sensitivity to perturbations compared to typical microresonators. The behavior of counterpropagating modes induces a unique splitting of Lorentzian transmission spectra, proportional to the square root of perturbation strength.
INTEGRATED OPTICS: DEVICES, MATERIALS, AND TECHNOLOGIES XXVI
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
M. Sanna, D. Rizzotti, S. Signorini, L. Pavesi
Summary: This work investigates the application of intermodal spontaneous four wave mixing (SFWM) to ghost spectroscopy in the mid-infrared (MIR) spectral region. By generating time-correlated photons in a Silicon-On-Insulator (SOI) waveguide, the spectral resolution in the MIR is improved under noisy background conditions.
QUANTUM SENSING AND NANO ELECTRONICS AND PHOTONICS XVIII
(2022)
