Article
Chemistry, Multidisciplinary
Qing Xie, Xiaoji G. Xu
Summary: This study develops a Fourier transform AFM-IR technique with peak force infrared microscopy and broadband femtosecond IR pulses, enabling the mechanical detection of photothermal expansion caused by infrared absorption. The method bypasses Abbe's diffraction limit and allows for chemical imaging of materials. The intriguing observation of vertical asymmetry in the interferogram suggests the presence of multiphoton absorption processes.
Article
Optics
Jeremy Xuan Yu Chew, Zi Heng Lim, Y. Qi, Guangcan Zhou, Guangya Zhou
Summary: Infrared devices are increasingly used in various applications. This paper introduces a novel dispersive spectrometer that has high-throughput and decoupled spectral resolution. The proposed spectrometer utilizes a two-stage Hadamard transform encoding process to increase the signal-to-noise ratio. With a single-pixel detector, the system can be easily implemented in other desired wavelengths. Additionally, a method is developed to remove the need for uniform illumination and improve the ease of device design for in situ measurement.
Article
Chemistry, Multidisciplinary
Xiangzhe Zhang, Jingping Zhu, Liqing Huang, Yu Zhang, Huimin Wang, Jinxin Deng, Fengqi Guo
Summary: The optical displacement calculation formula for the dual Wollaston prism is derived and validated. The relationship between the maximum incident aperture, incident angle, and incident surface angle is provided for different incident waves. The aperture utilization of a novel static birefringent Fourier transform imaging spectrometer based on dual Wollaston prisms is analyzed, considering the incident surface angle, incident angle, and prisms' air gap thickness.
APPLIED SCIENCES-BASEL
(2023)
Review
Instruments & Instrumentation
Nicole M. Ralbovsky, Igor K. Lednev
Summary: Type II diabetes mellitus is a metabolic disorder with high prevalence and mortality rates worldwide, leading to various dangerous diseases. Current methods for diabetes detection have limitations in terms of fluctuation and accuracy, highlighting the need for more effective diagnostic approaches.
APPLIED SPECTROSCOPY
(2021)
Article
Optics
Spencer W. Jolly, Olivier Gobert, Fabien Quere
Summary: Utilizing a birefringent delay line for spatially-resolved Fourier transform spectroscopy, combined with the INSIGHT technique, enables the determination of the three-dimensional laser field. This technique allows for the simultaneous measurement of two low-order spatio-temporal couplings, improving accuracy and stability in spatio-spectral characterization.
Article
Optics
Zhong Zuo, Chenglin Gu, Daowang Peng, Xing Zou, Yuanfeng Di, Lian Zhou, Daping Luo, Yang Liu, Wenxue Li
Summary: This study successfully demonstrates the generation of a highly mutually coherent dual mid-infrared comb spectrometer based on optical-optical modulation, allowing flexible tuning of center wavelength and parallel detection of multiple molecular species. It shows potential for applications outside the laboratory setting, such as open-path atmospheric gas sensing and industrial process monitoring.
PHOTONICS RESEARCH
(2021)
Article
Computer Science, Information Systems
Ilaiah Kavati, A. Mallikarjuna Reddy, E. Suresh Babu, K. Sudheer Reddy, Ramalinga Swamy Cheruku
Summary: The paper proposes a new method to secure fingerprint templates using elliptical structures generated from fingerprint minutiae. It involves generating a feature vector from the ellipse, projecting it onto a 3D-space, computing a binary string, transforming it to frequency domain (DFT), and multiplying with a random matrix to ensure security. The results demonstrate the effectiveness of the method in protecting fingerprints.
Article
Biochemistry & Molecular Biology
Qiaolin Wang, Zhengbo Qin, Gao-Lei Hou, Zheng Yang, Marat Valiev, Xue-Bin Wang, Xianfeng Zheng, Zhifeng Cui
Summary: This study investigated L-cysteine S-sulfate, Cys-SSO3H, and their derivatives through electrospray ionization and negative ion photoelectron spectroscopy. The results showed that the deprotonated anion [cysS-SO3](-) was stabilized by three intramolecular hydrogen bonds, with the amino group acting as both acceptor and donor. The theoretical predictions and experimental findings also suggested the existence of a competing isomer, characterized by an O-HN-HS chain-type binding motif. The infrared spectra provided a way to distinguish different isomers. This research lays the foundation for understanding the transformation and structure-reactivity correlation of Cys-SSO3H in biological settings.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Optics
Ali Elkhazraji, Mohammad Khaled Shakfa, Marco Lamperti, Khaiyom Hakimov, Khalil Djebbi, Riccardo Gotti, Davide Gatti, Marco Marangoni, Aamir Farooq
Summary: We present a method for high-resolution spectroscopy in the molecular fingerprint region using a widely tunable laser based on difference-frequency generation (DFG) in a nonlinear orientation-patterned GaAs crystal. The developed DFG laser source demonstrates versatility and potential for molecular fingerprinting by resolving absorption features and quantifying self-broadening coefficients. The spectrometer offers wide tunability and resolution, enabling the resolution of broadband absorption spectra.
Article
Engineering, Electrical & Electronic
Bassem Mortada, Mostafa Medhat, Yasser M. Sabry, Mohamed Sadek, Ahmed Shebl, Khaled Hassan, Moez El-Masry, Yasseen Nada, Momen Anwar, Mina Gad, Mohamed H. Al Haron, Bassam Saadany, Diaa Khalil, Tarik Bourouina
Summary: Miniaturized spectrometers are rapidly developed to meet the demands of on-site and mobile spectroscopic analysis, with an integrated MEMS-based FT-IR spectral sensor presenting low cost, low power, and high signal-to-noise ratio capabilities.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Physics, Multidisciplinary
A. D. Corcoles, Maika Takita, Ken Inoue, Scott Lekuch, Zlatko K. Minev, Jerry M. Chow, Jay M. Gambetta
Summary: The research explored dynamic quantum circuits on superconducting-based quantum systems, involving the evolution of quantum state, periodic measurements, and concurrent processing of classical information. It demonstrated that the real-time quantum computing version can yield results comparable to classical asynchronous postprocessing methods.
PHYSICAL REVIEW LETTERS
(2021)
Article
Computer Science, Interdisciplinary Applications
Bingqiang Zhao, Honglin Zhai, Haiping Shao, Kexin Bi, Ling Zhu
Summary: The study investigates the application of vibrational spectroscopy and machine learning for the initial screening of COVID-19 patients. A hybrid classification model called grey wolf optimized support vector machine (GWO-SVM) is proposed and compared with other machine learning models. The results demonstrate that the GWO-SVM model shows superior accuracy and specificity for COVID-19 screening, indicating its potential for clinical use.
COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE
(2023)
Article
Optics
Xiangzhe Zhang, Jingping Zhu, Liqing Huang, Yu Zhang, Huimin Wang, Haoxiang Li, Fengqi Guo, Jinxin Deng
Summary: This study introduces a novel channel-modulated static birefringent Fourier transform imaging spectropolarimeter (CSBFTIS) based on a double Wollaston prism (DWP). The spectral resolution can be adjusted by changing an adjustable air gap (AG) in the CSBFTIS. By combining the channel-modulated imaging spectropolarimeter with the slit-free static birefringent Fourier transform imaging spectrometer technology, the CSBFTIS offers adjustable spectral resolution and can greatly reduce the size of spectral image data compared to previous spectropolarimeters.
Review
Chemistry, Analytical
Shuyan Zhang, Yi Qi, Sonia Peng Hwee Tan, Renzhe Bi, Malini Olivo
Summary: Molecular vibrations are essential in physical chemistry and biochemistry, and Raman and infrared spectroscopy are the primary techniques used for vibrational spectroscopy. These techniques provide distinct molecular fingerprints that can be used to identify chemical bonds, functional groups, and molecular structures. This review article explores recent advancements in using Raman and infrared spectroscopy for molecular fingerprint detection, focusing on identifying specific biomolecules and understanding the chemical composition of biological samples for cancer diagnosis. The article also discusses the working principles and instrumentation of each technique, highlighting the analytical versatility of vibrational spectroscopy.
Article
Optics
Peter John Rodrigo, Lasse Hogstedt, Soren Michael Mork Friis, Lars Rene Lindvold, Peter Tidemand-Lichtenberg, Christian Pedersen
Summary: The novel MIR upconversion spectrometer (MIRUS) provides a record-high signal-to-noise ratio and a broad spectral coverage range, enabling operation in harsh environments. By utilizing broadband intracavity upconversion, MIRUS outperforms traditional FTIR systems with faster response rates and improved performance. Applications of MIRUS in gas sensing, plastic identification, and rapid photopolymerization monitoring have been successfully demonstrated.
LASER & PHOTONICS REVIEWS
(2021)
Article
Physics, Condensed Matter
Armando Genco, Chiara Trovatello, Charalambos Louca, Kenji Watanabe, Takashi Taniguchi, Alexander Tartakovskii, Giulio Cerullo, Stefano Dal Conte
Summary: This article investigates the ultrafast dynamics of neutral and charged excitons in high-quality hBN-encapsulated monolayer MoS2. The results show that neutral excitons have a narrow linewidth and fast recombination, while trions exhibit markedly different dynamics compared to neutral excitons. These results are important for exploring the ultrafast behavior of excitons and their many-body complexes in TMD heterostructures.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Srabanti Ghosh, Susmita Bera, Samim Sardar, Sourabh Pal, Franco V. A. Camargo, Cosimo D'Andrea, Giulio Cerullo
Summary: A multiphase copper-cuprous oxide/polypyrrole heterostructure was designed to identify the role of multiple oxidation states of metal oxides in photocatalytic water splitting. The heterostructure exhibited significantly enhanced photocatalytic hydrogen generation rate and quantum efficiency, as well as improved charge carrier density and photocurrent density compared to pure polymers. The formation of a p-p-n junction between polymer and metal oxide interfaces induced a built-in electric field that influenced directional charge transfer and improved catalytic activity.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
M. Marini, A. Nardini, R. Martinez Vazquez, C. Conci, M. Bouzin, M. Collini, R. Osellame, G. Cerullo, B. S. Kariman, M. Farsari, E. Kabouraki, M. T. Raimondi, G. Chirico
Summary: Non-linear excitation microscopy has advantages over conventional confocal techniques for in-vivo imaging, but tissue penetration can still be problematic. This study develops and tests fibroblast cell culture plano-convex microlenses for non-linear imaging of biological tissue. The microlenses can be used individually or in an array, and they provide magnified fluorescence images without substantially affecting the signal-to-noise ratio. These results pave the way for optical in-vivo inspection of biological processes using implanted micro-optics.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Saptarshi Chakraborty, Payel Mondal, Mahima Makkar, Luca Moretti, Giulio Cerullo, Ranjani Viswanatha
Summary: Transition metal doping in II-VI semiconductor quantum dots introduces midgap states and adds previously unavailable properties. This study investigates CdS quantum dots doped with different transition metal ions using X-ray absorption fine structure spectroscopy and transient absorption spectroscopy, providing evidence for the origin of magnetization and the importance of ion radius and oxidation state in dopant-anion bond lengths. Based on ultrafast transient absorption spectroscopy, the study proposes photoinduced switching between multiple oxidation states in some dopants.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Vasilis Petropoulos, Ioannis Georgoulis, Chrisovalantou Vourdaki, Peter Hrobarik, Ivica Sigmundova, Jela Nociarova, Margherita Maiuri, Giulio Cerullo, Mihalis Fakis
Summary: This study compares the photophysics and ultrafast dynamics of dipolar and octupolar molecules with benzothiazole acceptors having matched or mismatched orientation. The results show that derivatives with mismatched geometry exhibit stronger fluorescence solvatochromism and faster excited state dynamics. However, introducing an auxiliary acceptor enhances the intramolecular charge transfer for molecules with matched geometry. These findings confirm the crucial role of the relative orientation of the heteroaromatic unit in tuning optical properties and excited state dynamics.
Article
Chemistry, Physical
Samylla Boazegevski, Jeferson Ferreira de Deus, Denis Augusto Turchetti, Leni Campus Akcelrud, Samim Sardar, Cosimo D'Andrea, Franco V. A. Camargo, Giulio Cerullo, Giovanni Bressan, Stephen R. Meech, Ismael A. Heisler
Summary: A detailed photophysical study was conducted on a polymer based on a fluorene derivative using ultrafast nonlinear spectroscopy. The study found significant differences in the photophysical behavior of the polymer in solution and as a film, suggesting a near absence of self-collapsed chain conformations in solution. In the film, interchain interactions promote efficient energy transfer, resulting in faster excited state relaxation compared to solution. The time scales of exciton dynamics revealed in this study are useful for designing blends for optoelectronic and electro-optical devices.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Optics
Marco Piccardo, Michael de Oliveira, Veronica R. R. Policht, Mattia Russo, Benedetto Ardini, Matteo Corti, Gianluca Valentini, Jorge Vieira, Cristian Manzoni, Giulio Cerullo, Antonio Ambrosio
Summary: By introducing a diffractive axicon in a pulse shaper, topological-spectral correlation can be imparted to ultrafast pulses in the visible region with a large range of topological charges. This approach allows for the synthesis of ultrashort pulses with tailored spatial and temporal properties, enabling new possibilities in multimode photonics. The use of a diffractive axicon with circular geometry and a hyperspectral off-axis holography technique enables the control and manipulation of various properties of wave packets.
Article
Chemistry, Multidisciplinary
Salvatore Sorrentino, Francesco Manetti, Arianna Bresci, Federico Vernuccio, Chiara Ceconello, Silvia Ghislanzoni, Italia Bongarzone, Renzo Vanna, Giulio Cerullo, Dario Polli
Summary: The success of chemotherapy and radiotherapy in treating cancer can lead to tumor suppression or senescence induction. However, recent advancements in oncology research have shown that senescence can contribute to cancer recurrence. Nonlinear optical (NLO) microscopy provides a non-invasive and label-free method for detecting therapy-induced senescent cells. In this study, we develop deep learning architectures to classify senescent and proliferating human cancer cells using NLO microscopy images, and compare their performances. The ensemble classifier approach, which uses seven pre-trained classification networks with additional fully connected layers, achieves a classification accuracy of over 90%. This opens the possibility of building an automatic and unbiased senescent cells image classifier based on multimodal NLO microscopy data, with potential applications in clinical diagnosis.
FRONTIERS IN CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Benedetto Ardini, Cristian Manzoni, Benedetta Squeo, Francesca Villafiorita-Monteleone, Paolo Grassi, Mariacecilia Pasini, Monica Bollani, Tersilla Virgili
Summary: Nowadays, there is a growing demand for alternative non-plastic packaging in the food industry. This study focuses on enhancing the UV absorption properties of popular biodegradable films, cellulose and poly(lactic acid) (PLA), by coating them with thin layers of carbon dots (CDs) dispersed in polyvinyl alcohol (PVA). The results show a significant increase in UV light-absorbing capacity and provide a novel technique for characterizing large surface areas using simultaneous detection of PL spectra.
Article
Physics, Multidisciplinary
Marco Lamperti, Lucile Rutkowski, Daniele Ronchetti, Davide Gatti, Riccardo Gotti, Giulio Cerullo, Franck Thibault, Hubert Jozwiak, Szymon Wojtewicz, Piotr Maslowski, Piotr Wcislo, Dario Polli, Marco Marangoni
Summary: By introducing stimulated Raman scattering metrology, a frequency comb is used to calibrate the frequency detuning between the pump and Stokes excitation lasers, overcoming the weak cross-sections of infrared-inactive transitions. The authors applied this method to investigate molecular hydrogen and achieved an unprecedented parts-per-billion accuracy in measuring the transition frequency of its Q(1) fundamental line. This comb-calibrated stimulated Raman scattering spectrometer extends the range of optical frequency metrology and can be easily adapted to measure other infrared-inactive transitions.
COMMUNICATIONS PHYSICS
(2023)
Article
Chemistry, Physical
Vasilis Petropoulos, Lorenzo Uboldi, Margherita Maiuri, Giulio Cerullo, Lara Martinez-Fernandez, Evangelos Balanikas, Dimitra Markovitsi
Summary: The polarity of DNA has been found to have an impact on the relaxation of DNA electronic excited states, with different nucleotide sequences leading to different optical properties.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Piotr Kabacinski, Pietro Marabotti, Daniele Fazzi, Vasilis Petropoulos, Andrea Iudica, Patrick Serafini, Giulio Cerullo, Carlo S. S. Casari, Margherita Zavelani-Rossi
Summary: Investigated the photophysics of one-dimensional linear nanostructures and revealed their excellent mechanical, thermal, and electronic properties. Studied the excited state relaxation processes using experimental and computational methods, providing important insights into photoinduced events in low-dimensional carbon-based materials.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Andrea Schirato, Mychel G. Silva, Danielle C. Teles-Ferreira, Cristian Manzoni, Ana Maria de Paula, Giulio Cerullo, Giuseppe Della Valle, Marcel Di Vece
Summary: The photoexcitation of plasmonic nanostructures with ultrashort laser pulses allows for understanding the ultrafast nonlinear optical response and fundamental processes triggered by light absorption. The effects of photoexcitation on plasmonic nanostructures are studied using broadband transient absorption spectroscopy and semiclassical nonlinear simulations. The results provide a comprehensive understanding of the thermo-modulational nonlinearities of plasmonic nanostructures exhibiting resonances close to the interband transition threshold.
ADVANCED PHOTONICS RESEARCH
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Armando Genco, Cristina Cruciano, Matteo Corti, Kirsty E. Mcghee, Benedetto Ardini, Tersilla Virgili, David G. Lidzey, Andrea Bassi, Gianluca Valentini, Giulio Cerullo, Cristian Manzoni
Summary: Fourier-plane optical microscopy is a powerful technique for studying the angularly-resolved optical properties of materials and devices. By combining it with an innovative hyperspectral imaging system, this study provides a new approach for characterizing planar organic microcavities. The system is able to extract angle-resolved hyperspectral information, revealing the parabolic cavity dispersion across the whole Fourier space.
PHOTONIC INSTRUMENTATION ENGINEERING X
(2023)
