Article
Optics
Zi-Xing Yang, Qian-Long Shou, Xiaohong Zhou, Xin-Jun Zhang, Wenbin Huang, Linsen Chen
Summary: A liquid crystal geometric phase-based chiral imaging lens (CIL) is proposed, which is compact, lightweight, and capable of producing chiral images.
Article
Nanoscience & Nanotechnology
Yu Lin, Gaige Zheng, Qian Xin, Quan Yuan, Yongmin Zhao, Shuming Wang, Zhen-Lin Wang, Shi-Ning Zhu, Chunping Jiang, Aimin Song
Summary: Research on advanced nanostructures and smart materials for dynamic color display in portable and wearable devices has rapidly developed. An electrically switchable and flexible color display technique using an electrochromic material with all-dielectric nanogratings has been demonstrated, achieving high color purity and gamut value. This technique allows for high switching contrast and low power consumption, with the potential applications in full-color displays, colorimetric sensing, information encryption, and anticounterfeit strategies.
ACS APPLIED NANO MATERIALS
(2021)
Article
Astronomy & Astrophysics
G. Yu Prokhorov, O. Teryaev, V. Zakharov
Summary: The study examines the difference in flow of left- and right-handed photons along the vector of angular velocity in rotating photonic medium, considering two alternative frameworks to evaluate the effect. By paying more attention to details of infrared regularizations, the introduction of an infinitesimal mass of the vector field brings the two ways of evaluating the chiral vortical effect into agreement with each other. Some implications, on both the theoretical and phenomenological sides, are mentioned in the study.
Article
Optics
Monu Nath Baitha, Kyoungsik Kim
Summary: In this study, the polarization-independent photonic spin Hall effect (PSHE) is achieved by manipulating the spin-orbit coupling of light. The thickness of the thin film can be adjusted to control the device's characteristic size. This finding will contribute to the development of polarization-independent nano-photonics devices.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
C. Wang, F. Li, Y. Xu, M. Duan, Y. Song, Y. Yang, H. Zhang
Summary: The all-optical technique is an effective method to overcome the speed limitation of electric devices, with a focus on two-dimensional materials like SnSe due to their strong nonlinear optical properties. This study successfully fabricated SnSe nanosheets and measured their nonlinear optical parameters, demonstrating the application of SnSe material in all-optical switch and all-optical AND gate. The results suggest that SnSe materials have great potential in nonlinear photonics devices for high-performance all-optical signal processing.
MATERIALS TODAY PHYSICS
(2021)
Article
Chemistry, Physical
Frederick P. Marlton, Sanjib Nayak, Sarangi Venkateshwarlu, Ngai Hang Chan, Jing Kong, Yuanpeng Zhang, Matthew G. Tucker, Mads Ry Vogel Jorgensen, Abhijit Pramanick
Summary: Electrothermal energy conversion offers promising solutions for global energy management, utilizing relaxor ferroelectrics with large pyroelectric coefficients and the electrocaloric effect. Researchers have engineered lead-free relaxor materials based on a multisite doping strategy, demonstrating high electrothermal performance and providing structural insight for atomic-scale engineering of environmentally sustainable ferroelectrics in future energy applications.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jingang Li, Mingsong Wang, Zilong Wu, Huanan Li, Guangwei Hu, Taizhi Jiang, Jianhe Guo, Yaoran Liu, Kan Yao, Zhihan Chen, Jie Fang, Donglei Fan, Brian A. Korgel, Andrea Alu, Yuebing Zheng
Summary: A study has reported reconfigurable chiral nanostructures with silicon nanoparticles and nanowires, allowing for tailored configurations and chiroptical responses. The optical chirality arises from the coupling between optical resonances of the silicon nanoparticle and nanowire, enabling label-free enantiodiscrimination of biomolecules in single structures. This research provides insights into high-index material design and new strategies for adaptive devices in photonic and electronic applications.
Article
Chemistry, Multidisciplinary
Ruiheng Pan, Xiantong Tang, Lixuan Kan, Yang Li, Haomiao Yu, Kai Wang
Summary: This study demonstrates the circular photogalvanic effect (CPGE) and linear photogalvanic effect (LPGE) in (R-MBA)(2)PbI4 and (S-MBA)(2)PbI4 thin film materials. These effects exhibit decent two-fold symmetry for a complete cycle in a wide temperature range from 4 K to 300 K. The effect can be effectively tuned by constant magnetic fields, and the Bychkov-Rashba spin orbit coupling and chiral-induced magnetization are responsible for it. This research shows the promising future of using chiral lead halide perovskites for spin-orbitronics.
Article
Chemistry, Multidisciplinary
Xiao Shao, Cheng Zhu, Prashant Kumar, Yanan Wang, Jun Lu, Minjeong Cha, Lin Yao, Yuan Cao, Xiaoming Mao, Hendrik Heinz, Nicholas A. Kotov
Summary: Reconfiguration of chiral ceramic nanostructures after ion intercalation can lead to strong chiroptical effects. In this study, V2O3 nanoparticles with built-in chiral distortions were modified by intercalation of Zn2+ ions, resulting in particle expansion, untwist deformations, and chirality reduction. Layer-by-layer assembled nanocomposite films showed voltage-driven modulation of optical activity and demonstrated potential for photonic devices in the IR and NIR range. The high optical activity, synthetic simplicity, and environmental robustness of these chiral nanocomposites provide a versatile platform for various applications.
ADVANCED MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Chenglong Zheng, Jie Li, Guocui Wang, Jitao Li, Silei Wang, Mengyao Li, Hongliang Zhao, Zhen Yue, Yating Zhang, Yan Zhang, Jianquan Yao
Summary: Metamaterials achieve superior electromagnetic properties by adjusting structure, and chiral metamaterials are widely used in optics. A novel approach using all-silicon coding metasurfaces to achieve chirality-like function through spin decoupling is proposed, with experimental verifications conducted.
Article
Chemistry, Physical
Oliver Paull, Changsong Xu, Xuan Cheng, Yangyang Zhang, Bin Xu, Kyle P. Kelley, Alex de Marco, Rama K. Vasudevan, Laurent Bellaiche, Valanoor Nagarajan, Daniel Sando
Summary: Epitaxial strain and orientation engineering have been combined to create a low-symmetry phase of BiFeO3 with enhanced piezoelectric response, which undergoes a transition to the tetragonal-like polymorph under electric field. This results in an enhanced piezoelectric response throughout the film and associated field-induced reversible strains. This approach offers a way to improve the functionalities of thin-film piezoelectrics, with potential applications in other functional oxides.
Article
Chemistry, Physical
Chetana Badala Viswanatha, Johannes Stoeckl, Benito Arnoldi, Sebastian Becker, Martin Aeschlimann, Benjamin Stadtmueller
Summary: The study demonstrates a spin selective electron transmission for the point-chiral molecule 3-methylcyclohexanone (3-MCHO) adsorbed on the chiral Cu(643)R surface, depending on all three components of the electrons' spin. In all-chiral heterostructures, selective tuning of CISS is expected to be achieved through enantiospecific molecule-surface interaction.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Physics, Applied
Lianlian Du, Yahong Liu, Xin Zhou, Liyun Tao, Meize Li, Huiling Ren, Ruonan Ji, Kun Song, Xiaopeng Zhao, Miguel Navarro-Cia
Summary: This study presents an all-dielectric chiral photonic crystal that guides the propagation of electromagnetic waves without backscattering for dual bands. It also demonstrates the applicability of this crystal in communication systems by creating a duplexer and a power divider.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Cijil Raju, Gunjan R. Ramteke, K. V. Jovan Jose, Kana M. Sureshan
Summary: A topochemical polymerization governed by a topotactic polymorphic transition is described. Crystallized form of monomer with azide and an internal alkyne did not react due to the specific arrangement of molecules. However, upon heating, a polymorphic transition occurred, resulting in a reactive form capable of undergoing topochemical reaction to form a polymer. This study highlights the unpredictability of topochemical reactivity based solely on crystal structure.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Multidisciplinary Sciences
Chun-Wei Chen, Iam Choon Khoo
Summary: This study focused on the characteristics of high-N CPCs, which are realized by field-assisted self-assembly of cholesteric liquid crystals to unprecedented thicknesses. The high-N CPCs exhibit broad transmission maxima and giant rotatory power, enabling large polarization rotation over a large operation bandwidth, independent of the input polarization orientation.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Chemistry, Physical
V. V. Vanyukov, M. Shuba, A. G. Nasibulin, Y. P. Svirko, P. P. Kuzhir, G. M. Mikheev
Summary: The nonlinear absorption and refraction of free-standing films made of single-walled carbon nanotubes (SWNTs) have been studied experimentally and theoretically, analyzing the effects of laser pulse duration and dynamic Burstein-Moss shift on saturation intensity. Experimental results showed high absorption modulation depth and red-shifted saturation intensity minimum due to dynamic Burstein-Moss shift. Measurements also revealed negative nonlinear refractive index at specific wavelengths.
Article
Nanoscience & Nanotechnology
Lena Golubewa, Tatsiana Kulahava, Aliona Klimovich, Danielis Rutkauskas, Ieva Matulaitiene, Renata Karpicz, Nikita Belko, Dmitri Mogilevtsev, Alena Kavalenka, Marina Fetisova, Petri Karvinen, Yuri Svirko, Polina Kuzhir
Summary: In this study, it is demonstrated that green fluorescence graphene quantum dots can detect the presence of hypochlorous acid and selectively detect reactive chlorine species produced by neutrophils. Changes in the fluorescence of GQDs under different conditions make them a promising sensing agent for biomedical applications.
Article
Nanoscience & Nanotechnology
Marian Baah, Afifa Rahman, Sarah Sibilia, Gianmarco Trezza, Luigi Ferrigno, Laura Micheli, Antonio Maffucci, Ekaterina Soboleva, Yuri Svirko, Polina Kuzhir
Summary: This paper proposes an original approach for real-time detection of industrial organic pollutants in water based on the time evolution monitoring of the electrical impedance of low-cost graphitic nanomembranes. The approach utilizes the high sensitivity of 2D graphene-related materials to adsorbents. The study examines the sensitivity of nanomembranes based on pyrolyzed photoresist, pyrolytic carbon (PyC), and multilayer graphene films, and demonstrates the correlation between the sensitivity of electric impedance to adsorbents and the structure of the nanomembranes. The results reveal that amorphous PyC, being the most homogeneous and adhesive to the SiO2 substrate, shows the most promising integration capability into industrial pollutants sensors.
Article
Physics, Applied
Yuyuan Huang, Kuniaki Konishi, Momoko Deura, Yusuke Shimoyama, Junji Yumoto, Makoto Kuwata-Gonokami, Yukihiro Shimogaki, Takeshi Momose
Summary: This study aimed to identify suitable metallic materials for constructing metal-coated dielectric terahertz (THz) waveguides. The researchers examined seven different metals and experimentally determined the propagation losses of their metal-coated waveguides. They developed a physical model to estimate key parameters influencing the performance of the waveguides and applied it to identify copper (Cu) as the optimal metal. The study also evaluated the impact of surface oxide layers on THz wave propagation and found that copper oxide had negligible effect.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Multidisciplinary Sciences
Yusuke Morita, Kosuke Yoshioka, Makoto Kuwata-Gonokami
Summary: A new type of Bose-Einstein condensate was observed in a trapped gas of 1s paraexcitons in bulk Cu2O below 400 mK, with a small condensate fraction of 0.016 and spatial profile described by mean-field theory. The condensate was undetectable by conventional luminescence spectroscopy, showing potential for understanding quantum statistical mechanics of non-equilibrium open systems.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Applied
Masataka Kobayashi, Yusuke Arashida, Kanta Asakawa, Keisuke Kaneshima, Masashi Kuwahara, Kuniaki Konishi, Junji Yumoto, Makoto Kuwata-Gonokami, Jun Takeda, Ikufumi Katayama
Summary: Using high-repetition-rate single-shot spectroscopy and a laser microscope, we revealed the pulse-to-pulse ultrafast dynamics of energy relaxation in Ge2Sb2Te5 thin films. The study observed the transient transmittance change of the crystalline phase and the subsequent amorphous phase energy relaxation, leading to efficient energy relaxation and the formation of laser-induced periodic surface structures.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Yaraslau Padrez, Lena Golubewa, Anastasiya Bahdanava, Marija Jankunec, Ieva Matulaitiene, Dmitry Semenov, Renata Karpicz, Tatsiana Kulahava, Yuri Svirko, Polina Kuzhir
Summary: A systematic spectroscopic characterization of highly homogeneous water suspensions of 'buckydiamonds' revealed four types of specific structures on the ND surface that demonstrate excitation-wavelength-dependent photoluminescence (PL). The PL properties of NDs suspensions show concentration-dependent behavior, indicating a tendency for NDs to agglomerate. The pH sensitivity of the 'buckydiamonds' was explored, and it was found that they can serve as all-optical sensors for tiny pH variations in a wide range of pH values.
Article
Optics
Ryohei Yamada, Wataru Komatsubara, Haruyuki Sakurai, Kuniaki Konishi, Norikatsu Mio, Junji Yumoto, Makoto Kuwata-Gonokami
Summary: The utilization of sub-100 fs pulses is an attracting approach to improve femtosecond laser microfabrication. However, nonlinear propagation effects in air distort the beam's profile, making it difficult to predict the ablation crater shape. In this study, we developed a method using nonlinear propagation simulations to quantitatively predict the ablation crater shape. The method showed excellent agreement with experimental results for different pulse energies and revealed a correlation between simulated fluence and ablation depth.
Article
Physics, Applied
A. Ospanova, M. Cojocari, P. Lamberti, A. Plyushch, L. Matekovits, Yu. Svirko, P. Kuzhir, A. Basharin
Summary: According to the Babinet principle, the diffraction pattern from an opaque body is identical to that from a hole of the same shape and size. We propose a Babinet principle-based metamaterial made of two complementary metal/hole checkerboards, which demonstrates absolute transparency in a broad frequency range. The proven concept of simple, reproducible, and scalable design of the Babinet metamaterial paves the way for the fabrication of broadband transparent devices at any frequency, including THz and optical ranges.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Timofei Eremin, Valentina Eremina, Yuri Svirko, Petr Obraztsov
Summary: Covalent functionalization of single-walled carbon nanotubes (SWCNTs) can greatly enhance their photoluminescent (PL) brightness, making them suitable for infrared light emitters.
Article
Materials Science, Multidisciplinary
J. Omachi, N. Naka, K. Yoshioka, M. Kuwata-Gonokami
Summary: In this study, we investigated the dynamic properties of the electron-hole state in electron-hole droplets (EHDs) using dielectric response measurements. We found that the surface plasmon resonance of EHDs and the electron-hole Coulomb interaction had a significant impact on the dynamic dielectric response. The carrier density inside EHDs remained constant, while the decay time of the condensed volume was short and the AC conductivity relaxation rate was the highest among group-IV semiconductors during the nanosecond timescale.
Article
Optics
Yiping Chen, Munekazu Horikoshi, Makoto Kuwata-Gonokami, Kosuke Yoshioka
Summary: In this study, a balanced noninteracting Bose gas was created using a Bose-Fermi mixture, and the critical point of noninteraction was determined. The results of this study are crucial for further understanding the properties of an ideal Bose gas in a harmonic trap.