Article
Materials Science, Multidisciplinary
C. J. Valencia-Caicedo, E. I. Chaikina, A. V. Khomenko
Summary: We numerically studied the second-harmonic generation (SHG) from subwavelength GaAs relief gratings with and without Au nano-stripes. Our results showed that adding Au nano-stripes significantly enhanced the SHG efficiency, with more than 500 times enhancement and an absolute value of 1.2 x 10(-3)% when the intensity of pump light was 1 GW/cm(2).
RESULTS IN PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Young-Ho Jin, Juntaek Oh, Wonshik Choi, Myung-Ki Kim
Summary: The paper proposes a novel method to resolve individual eigenmodes of subwavelength nanostructures. By constructing a transmission matrix and utilizing singular value decomposition, the near-field profiles and energy spectra of individual eigenmodes can be effectively resolved. This method has significant implications for designing and utilizing optical devices.
Article
Nanoscience & Nanotechnology
Amin Tayebi, Scott Rice
Summary: This paper studies the one-dimensional structures of non-Hermitian plasmonic metallic nanospheres, revealing nontrivial physics emerging from strong non-radiative near field coupling between adjacent spheres. Investigation on a system of two identical spheres shows that when the width of uncoupled spheres' plasmonic resonance is twice the imaginary component of the coupling constant, the spheres become coupled through a single continuum channel, leading to distinguishable eigenmodes of superradiant states and dark states.
PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Amin Tayebi, Scott Rice
Summary: This paper investigates the properties of one-dimensional structures of non-Hermitian plasmonic metallic nanospheres, revealing the connection between coupling phenomena and resonant states, and exploring the unique physical phenomena resulting from their interactions.
PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS
(2021)
Review
Physics, Multidisciplinary
Alessandro Tuniz
Summary: Nonlinear plasmonics plays a key role in enhancing photonics integrated circuits, improving efficiency of light-matter interactions, and enabling high-performance optical signal processing and terahertz signal generation and detection.
RIVISTA DEL NUOVO CIMENTO
(2021)
Article
Optics
Haonan Ling, Arnab Manna, Jialiang Shen, Ho-Ting Tung, David Sharp, Johannes Froch, Siyuan Dai, Arka Majumdar, Artur R. Davoyan
Summary: This study investigates the interaction between light and matter in van der Waals MoS2 nanophotonic devices and demonstrates deep subwavelength optical field confinement in nanostructures, which has the potential to significantly reduce the size of integrated photonic devices and opto-electronic circuits.
Article
Materials Science, Multidisciplinary
Kevan K. MacKay, Shurui Wang, Pavel Cheben, Winnie N. Ye
Summary: This paper experimentally demonstrates a novel multimode waveguide implemented on a SOI platform, which supports multiple TE/TM modes across a wide range of wavelengths. Through optimized design and structure, it achieves low losses and cross-talk, showing good performance and reliability in practical applications.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Optics
Mingjie Wang, Yang Li, Yutao Tang, Jiafei Chen, Rong Rong, Guixin Li, Tun Cao, Shumei Chen
Summary: This study reports on the use of nonlinear chiroptical holography using Pancharatnam-Berry phase controlled achiral metasurfaces. The proposed metasurface enables spin selective nonlinear chiroptical holography through the second harmonic process on gold plasmonic metasurfaces. This has significant implications for multifunctional wavefront engineering and optical information processing.
LASER & PHOTONICS REVIEWS
(2022)
Review
Optics
Yuxi Fang, Changjing Bao, Si-Ao Li, Zhi Wang, Wenpu Geng, Yingning Wang, Xu Han, Jicong Jiang, Weigang Zhang, Zhongqi Pan, Zhaohui Li, Yang Yue
Summary: Supercontinuum (SC) has wide applications in optical communications, signal processing, metrology, and spectroscopy. This paper reviews the latest progress on various nanophotonic waveguides for Supercontinuum generation (SCG), including the discussion of different materials and their properties, the consideration of waveguide properties, and the analysis of different broadening mechanisms. It also provides perspectives on the spectral coverage, dispersion curves, and novel materials for SCG in nanophotonic waveguides.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Physical
Xiong Deng, Shen Shen, Yanli Xu, Jiangtao Liu, Jun Li, Zhenhua Wu
Summary: This study investigates photonic-crystal-like devices and microcavities in graphene. The results show that these graphene-based devices can be significantly smaller in size compared to conventional photonic crystals, thanks to the shorter optical transport wavelength in graphene. By changing the applied voltage, the functionality of the devices can be altered, making them highly programmable and adjustable. Furthermore, these devices can be integrated with traditional microelectronic circuits, leading to potential applications in photonic integrated circuits and computing.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Xiong Deng, Shen Shen, Yanli Xu, Jiangtao Liu, Jun Li, Zhenhua Wu
Summary: This theoretical study investigates photonic-crystal-like devices and microcavities in graphene. The results show that graphene-based devices can be scaled down significantly compared to conventional photonic crystals due to the shorter optical transport wavelength in graphene. The devices have high programmability and can be integrated with traditional microelectronic circuits, offering potential applications in photonic integrated circuits and computing.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Alex E. Chen, Xue-Qun Xia, Jian-Shiung Hong, Kuan-Ren Chen
Summary: The study finds that light funneling can guide the flow of energy into subwavelength slits. In contrast to previous research on oblique incident light, this study reveals that light funneling in the slits can be highly asymmetric, even at small angles. This mechanism is explained by polarized fields and charges induced using Poynting vectors. It is shown that when light is obliquely incident to the slits perforated in a perfect electric conductor, asymmetrical fields and charges accumulate at the upper apex corners of the left (right) sides. When light is incident from the left (right) side, more (less) induced fields and charges accumulate in the left (right) slit corner, resulting in an increase (decrease) in the funneling width, area, and energy flow at the left (right) side.
Article
Physics, Multidisciplinary
Liang Fang, Jian Wang
Summary: The study reveals that chiral-separable slot waveguides have high efficiency and feasibility in separating nanometer-scale enantiomers, allowing for the exchange of trapping equilibrium positions between two opposite enantiomers.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Philipp Grimm, Stefan Zeissner, Maximilian Roedel, Simon Wiegand, Sebastian Hammer, Monika Emmerling, Enno Schatz, Rene Kullock, Jens Pflaum, Bert Hecht
Summary: This study presents a nanoscale organic light-emitting antenna (OLEA) structure that serves as a color- and directionality-switchable light source. The structure utilizes gold nanoantennas and an organic semiconductor to achieve color and emission direction switching based on the polarity of the applied voltage. The OLEA structure facilitates efficient radiation transfer and eliminates the need for transparent electrodes.
Article
Chemistry, Multidisciplinary
Aoning Luo, Yuanjia Feng, Chunyan Zhu, Yipei Wang, Xiaoqin Wu
Summary: In this study, we propose a transfer learning approach for modeling metal nanowires and predicting their waveguiding properties. With the guidance of physics, basic knowledge of plasmon modes is first learned from circular nanowires, which is then transferred to improve the performance of predicting waveguiding properties of nanowires with complex configurations. Our approach reduces errors, trainable parameters, and training data required compared to direct learning methods, and significantly reduces computational time. Compared to non-deep learning methods, our approach offers higher accuracies and more comprehensive characterizations, making it an effective and efficient framework for investigating metal nanowires.
Article
Chemistry, Multidisciplinary
Quanlong Yang, Sergey Kruk, Yuehong Xu, Qingwei Wang, Yogesh Kumar Srivastava, Kirill Koshelev, Ivan Kravchenko, Ranjan Singh, Jiaguang Han, Yuri Kivshar, Ilya Shadrivov
ADVANCED FUNCTIONAL MATERIALS
(2020)
Article
Optics
S. R. Koutsares, E. K. Tanyi, S. J. Daniel, R. S. Savelev, M. Rahmani, D. Neshey, I. Shadrivov, M. A. Noginov
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2020)
Article
Multidisciplinary Sciences
Kirill Koshelev, Sergey Kruk, Elizaveta Melik-Gaykazyan, Jae-Hyuck Choi, Andrey Bogdanov, Hong-Gyu Park, Yuri Kivshar
Article
Materials Science, Multidisciplinary
Shridhar Manjunath, Mingkai Liu, Vidur Raj, Rifat A. Aoni, David A. Powell, Ilya V. Shadrivov, Mohsen Rahmani
ADVANCED OPTICAL MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Thomas Pertsch, Yuri Kivshar
Article
Chemistry, Multidisciplinary
Christian Schlickriede, Sergey S. Kruk, Lei Wang, Basudeb Sain, Yuri Kivshar, Thomas Zentgraf
Article
Optics
Kebin Fan, Ilya Shadrivov, Andrey E. Miroshnichenko, Willie J. Padilla
Summary: The article discusses the necessary polarizability requirements to achieve Kerker conditions in all-dielectric metasurfaces, demonstrating invisibility and perfect absorption phenomena, and provides a method for studying exotic electromagnetic phenomena through switching between states by modifying resonator height.
Article
Optics
Anastasia Zalogina, Roman Savelev, Dmitry Zuev, Ilya Shadrivov
Summary: Nanostructures made of high-refractive-index materials provide a novel technological platform for efficient light manipulation at the nanoscale. Si and GaP are the most suitable materials for the visible spectral range. By comparing the performance of the two materials in different parts of the visible spectrum, it is found that choosing the appropriate material is beneficial for emitters at different wavelengths.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Anastasia Zalogina, Luyao Wang, Elizaveta Melik-Gaykazyan, Yuri Kivshar, Ilya Shadrivov, Sergey Kruk
Summary: In the past decade, there have been significant advancements in mid-infrared photonics, particularly in the generation and detection of light. Efficient manipulation of mid-IR light remains challenging, but a recent study demonstrated spatially inhomogeneous polarization control using custom-designed vortex retarders. This implementation of mid-infrared vortex retarders based on metasurfaces could potentially lead to new classes of mid-infrared optical components.
Article
Multidisciplinary Sciences
Dmitri K. Gramotnev, Galina Gramotnev, Alexandra Gramotnev, Mathew J. Summers
Summary: This study investigates the impact factors on cognitive function and decline in early Parkinson's disease (PD) using generalized structural equation modelling. The results suggest that CSF p-tau181 or amyloid beta (1-42) may be the primary protein variables driving cognitive decline in PD. Additionally, high CSF amyloid concentrations are associated with nearly full protection against cognitive decline in early PD.
Article
Nanoscience & Nanotechnology
Yana Izdebskaya, Ziwei Yang, Mingkai Liu, Duk-Yong Choi, Andrei Komar, Dragomir N. Neshev, Ilya Shadrivov
Summary: Dielectric metasurfaces infiltrated with liquid crystals can be tuned by magnetic field, offering advantages over other liquid crystal tuning methods. This approach allows for gradual tuning of resonances without the need for pre-alignment or structured electrodes.
Article
Optics
Luyao Wang, Ilya Shadrivov
Summary: This study numerically investigates metasurfaces incorporating electro-optic materials and demonstrates their ability to achieve large amplitude and phase modulations over a fraction of the operation wavelength. The study shows that metasurfaces composed of dielectric discs on a lithium niobate film exhibit three types of resonances, namely, Fabry-Perot modes, guided modes, and Mie modes. By comparing the performance of metasurfaces in different regimes, the study finds that the strongest amplitude modulation can be achieved by exciting and re-emitting the guided modes in the substrate. Furthermore, the study reveals that for larger phase modulation while maintaining high transmission, more complex metasurfaces with at least two resonators per unit cell are required.
Article
Physics, Applied
Anastasiia Zalogina, Javid Javadzade, Roman Savelev, Filipp Komissarenko, Alexander Uvarov, Ivan Mukhin, Ilya Shadrivov, Alexey Akimov, Dmitry Zuev
Summary: The emission properties of nitrogen-vacancy (NV) centers in nanodiamonds placed in the near-field zone of silicon nanoresonators are investigated. It is demonstrated experimentally that the spontaneous emission rate of single NV centers in 50 nm nanodiamonds can be modified by their coupling to spherical nanoantennas, reducing the mode of the lifetime distribution by approximately 2 times from 16 to 9 ns. It is also shown that the collected intensity of photoluminescence emission from multiple NV centers in a 150 nm nanodiamond coupled to a cylindrical nanoantenna is increased by more than 50% compared to the intensity from the same nanodiamond on a bare substrate.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yana V. Izdebskaya, Ziwei Yang, Vladlen G. Shvedov, Dragomir N. Neshev, Ilya V. Shadrivov
Summary: In this work, a multifunctional dynamic tuning method for dielectric metasurfaces containing liquid crystals is introduced and demonstrated. By rotating an external magnetic field in 3D, the electric and magnetic resonances of the metasurfaces can be tuned, allowing for independent control and multifunctional operation. This approach eliminates the need for pre-alignment of liquid crystals and is not limited by a finite set of molecular orientations. The results open up new possibilities for dynamically reconfigurable devices and the observation of novel physical effects.
Article
Optics
Quanlong Yang, Dongyang Wang, Sergey Kruk, Mingkai Liu, Ivan Kravchenko, Jiaguang Han, Yuri Kivshar, Ilya Shadrivov
Summary: This article introduces a method of using topological devices to achieve on-chip integration and miniaturization, addressing the existing problems in terahertz technology. By designing and fabricating topological devices based on valley-Hall photonic structures, valley-locked asymmetric energy flow and mode conversion are achieved. The application of topological membrane metasurfaces brings many features to on-chip photonics and terahertz technology.
ADVANCED PHOTONICS
(2022)
