Article
Chemistry, Multidisciplinary
Ievgeniia Chaban, Radoslaw Deska, Gael Privault, Elzbieta Trzop, Maciej Lorenc, Steven E. Kooi, Keith A. Nelson, Marek Samoc, Katarzyna Matczyszyn, Thomas Pezeril
Summary: In this article, a novel spinning pump-probe photoacoustic technique is described for studying nonlinear absorption in thin films. The technique is validated using an organic polycrystalline thin film of quinacridone, and its broad applicability to difficult-to-characterize materials is demonstrated.
Article
Engineering, Electrical & Electronic
Minje Song, Hyunjong Choi, Gyudong Choi, Sang-Pil Han, Seungyoung Lim, Taehyun Lee, Minhyup Song
Summary: We present ultra-broadband flat-topped supercontinuum laser sources with programmable repetition rate, spectral bandwidth, and wavelength regime. This work opens new possibilities for generating robust and coherent multiple optical carriers with further C-bands in optical networks.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Yuzhou Wang, Marat Khafizov
Summary: The study demonstrates that crystal grain orientation and material's elastic properties play a crucial role in the efficiency of shear wave generation. Suitable grain orientations and material selections are recommended to facilitate shear wave detection.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Optics
Hanlin Zhang, Wenqiang Li, Nan Li, Huizhu Hu
Summary: The study analyzed the effect of lens misalignment on optical force within the geometrical optics range, and found that lens tilting has a greater impact on optical force than off-axis misalignment. The misalignments will couple with each other, causing a shift of the equilibrium point and asymmetry in optical trap stiffness.
Article
Nanoscience & Nanotechnology
Roger Bresoli-Obach, Tetsuhiro Kudo, Boris Louis, Yu-Chia Chang, Ivan G. Scheblykin, Hiroshi Masuhara, Johan Hofkens
Summary: Study found that resonant excitation leads to trapping stiffness enhancement, theoretically enabling single molecule manipulation at room temperature in solution.
Article
Materials Science, Multidisciplinary
Jinling Zhao, Hongli Ji, Jinhao Qiu, Chao Zhang, Jianping Zhao, Nian Li
Summary: This paper proposes an ultrasonic method for reconstructing the elastic properties of single-ply composite materials by combining bulk and guided waves, and utilizes genetic algorithms for inversion. Experimental results demonstrate the effectiveness of this method in identifying material properties under various layup scenarios.
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
(2022)
Article
Chemistry, Analytical
Riccardo Tognato, Philip H. Jones
Summary: In this paper, the trapping of healthy red blood cells in optical tweezers is numerically studied and it is found that the biconcave shape of the cells significantly affects the optical forces and torques. It is also demonstrated that adding an additional laser beam can control the orientation of the trapped cells. This investigation sheds light on the trapping mechanism of healthy erythrocytes and provides guidance for designing new experiments.
Article
Engineering, Electrical & Electronic
Mario Zitelli, Mario Ferraro, Fabio Mangini, Stefan Wabnitz
Summary: Optical solitons in multimode fibers have unique characteristics in terms of pulse duration and energy, which distinguishes them from solitons in single-mode fibers. This study proposes a theory for the Raman-induced soliton self-frequency shift in multimode fibers, and compares it with experimental data. The results show that specific values of pulsewidth and energy can lead to long-distance stability and better agreement with the theory of self-frequency shift, regardless of the input pulse duration. The Raman delay is affected by a jitter characterized by a Gaussian statistical distribution, with a stabilizing standard deviation for increasing pulse energies.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Chemistry, Analytical
C. Ghanashyam, Sachin Shetty, Sanjay Bharati, Santhosh Chidangil, Aseefhali Bankapur
Summary: The study introduces a new method of optical trapping and simultaneous micro-Raman spectroscopy using an optical vortex beam, successfully comparing the conformational state of hemoglobin molecules near and inside red blood cell membranes. Due to the face-on orientation, the Raman spectra obtained using the vortex beam show a significant contribution from membrane components compared to those obtained using the Gaussian beam.
ANALYTICAL CHEMISTRY
(2021)
Article
Engineering, Electrical & Electronic
Bo Fu, Chenghong Zhang, Pan Wang, Marcello Condorelli, Mario Pulvirenti, Enza Fazio, Ce Shang, Jing Li, Yan Li, Giuseppe Compagnini, Vittorio Scardaci
Summary: Metal nanomaterials, particularly Ag nanoplates, have been utilized as saturable absorber candidates in Yb-doped all-fiber lasers, demonstrating dual-wavelength synchronous mode-locking. The nonlinear optical properties of AgNPTs-based SA and the potential applications for stable and low-cost pulsed laser sources have been highlighted in this study. Achieving 293-ps pulse trains with a repetition rate of 11.43 MHz at a pump power of 350 mW indicates the promising prospects of solution-processed AgNPTs in ultrafast photonics.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Physics, Condensed Matter
P. Hemme, C-H Li, P. Djemia, P. Rovillain, S. Houver, Y. Gallais, A. Sacuto, H. Sakata, S. Nowak, B. Baptiste, E. Charron, B. Perrin, L. Belliard, M. Cazayous
Summary: Research on the elastic properties of TbMnO3 perovskite manganite with orthorhombic symmetry was conducted using time resolved pump and probe acoustics and first-principles calculations. Measurements of sound velocities and density functional theory calculations provided insights on the elastic constants of the material.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Optics
Xiaohe Zhang, Liping Gong, Guanghao Rui, Jun He, Yiping Cui, Bing Gu
Summary: This study investigates optical forces on Rayleigh particles using high-repetition-rate femtosecond-pulsed Gaussian beams, considering Kerr nonlinearity and thermal-optical nonlinearity simultaneously. It successfully achieves stable trapping of slightly low-refractive-index particles and studies the influence of thermal-optical nonlinearity on trapping high-refractive-index particles. The work opens up the possibility of trapping low refractive-index particles beyond the linear optics regime and provides theoretical support for tapping nonlinear optical particles in femtosecond optical tweezers.
OPTICS COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Fabio Falconi, Claudio Porzi, Antonio Malacarne, Filippo Scotti, Paolo Ghelfi, Antonella Bogoni
Summary: The 6G revolution has led to an increasing and urgent need for software-defined ultra-wideband and tunable radio frequency apparatuses with low size, weight, and power consumption. Issues in current RF technologies related to ultra-wideband and software-defined operation, tunability, and low SWaP can be addressed using photonic techniques, which also allow for very compact devices through recent advances in photonics integration.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Yilin Zhang, Zhenwu He, Ziying Wu, Jianxin Ren, Bo Liu, Ting Lei, Xiaocong Yuan
Summary: WSS is a crucial component in commercial reconfigurable optical add/drop multiplexer systems for future WDM networks. To meet the increasing data transmission demand, high-capacity WSS is required. In order to fully utilize the 2D selectivity of LCoS, a VIPA is introduced into the WSS system to expand 1D dispersion into 2D space. According to experimental results, this VIPA-grating-based 2D WSS approach enables a spectral resolution that can be narrowed to 1.57 GHz (an improvement of 18 times compared to 1D WSS) and predicts a massive number of WDM channels (>1600), while the data communication performance of the 2D WSS is also tested.
LASER & PHOTONICS REVIEWS
(2023)
Article
Engineering, Electrical & Electronic
Guijiang Yang, Hao Wu, Zi Liang, Liang Wang, Changjian Ke, Zhenggang Lian, Qianqing Yu, Zuming Xia, Ming Tang, Deming Liu
Summary: A single-mode Raman gain fiber was designed and fabricated for a Raman distributed temperature sensor with high-precision temperature measurement and low power consumption. The use of fluorine-doped inner cladding was shown to improve acoustic field control and suppress stimulated Brillouin scattering. By utilizing the high Raman gain of the fiber, a significant improvement in signal-to-noise ratio and reduction in temperature uncertainty were achieved, with the sensor consuming only half the power compared to traditional single-mode fiber sensors.
IEEE SENSORS JOURNAL
(2021)
Article
Optics
Reuven Gordon
OPTICS AND LASER TECHNOLOGY
(2019)
Review
Nanoscience & Nanotechnology
Reuven Gordon
Article
Optics
Adarsh Lalitha Ravindranath, Mirali Seyed Shariatdoust, Samuel Mathew, Reuven Gordon
Article
Chemistry, Multidisciplinary
Amirhossein Alizadehkhaledi, Adriaan L. Frencken, Frank C. J. M. van Veggel, Reuven Gordon
Article
Optics
Eradzh Rakhmatov, Amirhossein Alizadehkhaledi, Ghazal Hajisalem, Reuven Gordon
Article
Chemistry, Physical
Esmaeil Rahimi, Reuven Gordon
Summary: The study applies Bethe's theory to analyze the transmission of a subwavelength aperture in a metal film, treating it as a combination of a magnetic dipole and electric dipole for linear and nonlinear optics. The research shows that at angled incidence, the Lorentz force dominates the second harmonic generation, and matches well with the angular dependence of the magnetic and electric dipoles.
Review
Materials Science, Multidisciplinary
Reuven Gordon
ADVANCED OPTICAL MATERIALS
(2020)
Article
Chemistry, Physical
Zohreh Sharifi, Michael Dobinson, Ghazal Hajisalem, Mirali Seyed Shariatdoust, Adriaan L. Frencken, Frank C. J. M. van Veggel, Reuven Gordon
Summary: By tuning the size of gold double nanoholes (DNHs), single-photon sources can be enhanced, laying the foundation for emitting single nanocrystals at new wavelengths. The research shows that trapping time is proportional to the enhancement factor, potentially providing a new path to achieving 1550 nm single emitter sources.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Zohreh Sharifi, Reuven Gordon
Summary: The impact of loss on plasmonic resonances in metal-insulator-metal slits was analyzed, with a particular focus on its effect on the reflection phase. Reflection was calculated using single mode matching theory with the unconjugated form of the orthogonality relation. The reflection phase significantly influences the plasmonic resonance wavelengths, which were calculated using Fabry-Perot theory and compared with experimental results and simulations.
Article
Materials Science, Multidisciplinary
Reuven Gordon, Michael Dobinson
Summary: Gap plasmon structures hold promise for future ultrafast communication through simultaneous nanoscale integration of electromagnetic waves, nonlinear and optical-electrical conversion. The conventional notion of "smaller is better" for higher confinement is challenged when considering loss, but optimal performance may still require nanometer-scale gaps. To achieve widespread adoption, plasmonics may need to merge with emerging CMOS-like nanophotonics.
OPTICAL MATERIALS EXPRESS
(2021)
Article
Nanoscience & Nanotechnology
Ghazal Hajisalem, Mirali Seyed Shariatdoust, Rana Faryad Ali, Byron D. Gates, Paul E. Barclay, Reuven Gordon
Summary: By using a plasmonic optical tweezer and a double nanohole plasmonic tweezer, second harmonic generation from two-dimensional materials can be achieved at the nanoscale with higher power compared to traditional materials. The simple and efficient nonlinear generation will benefit future applications of these emerging materials in nonlinear optics.
Article
Optics
Amrita Pati, Reuven Gordon
Summary: A fully analytic theory is presented to study power and field enhancement inside a metal slit, with a derived generalized formula for the reflection coefficient at the interface of the slit. The study shows that power reaches its maximum when the scattering and absorption cross-sections of the slit are equal. The analytic results agree well with numerical simulations, promising for optimizing performance in various applications.
Article
Physics, Multidisciplinary
Ryan Peck, Ali Khademi, Juanjuan Ren, Stephen Hughes, Alexandre G. Brolo, Reuven Gordon
Summary: It was found that the linewidth of gold nanoparticles in P3HT and PMMA was halved in the lossy medium, contrary to the assumption that adding losses to a resonant system broadens the width of the resonance. Green function analysis revealed that the roles of permittivity in reducing the linewidth when material losses are increased. This surprising route to narrower linewidths is intriguing for various nanoplasmonic applications and resonant systems.
PHYSICAL REVIEW RESEARCH
(2021)
