Review
Chemistry, Multidisciplinary
Zexiang Han, Fei Wang, Juehan Sun, Xiaoli Wang, Zhiyong Tang
Summary: Artificial chiral nanostructures have been extensively studied for their unique chiroptical activities. Controlled twisted stacking of nanomaterials has emerged as a general strategy to introduce optical chirality into achiral solid-state systems. Recent progress in planar chiral metasurfaces is summarized, discussing the building blocks, fabrication methods, as well as circular dichroism and its modulation in twisted stacked nanostructures. The review highlights the growing applications of these chiral metasurfaces, including polarization conversion, information encryption, chiral sensing, and as an engineering platform for hybrid metadevices. Future prospects are also provided.
ADVANCED MATERIALS
(2023)
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
Min Zhang, Danni Hao, Shuai Wang, Rui Li, Shou Wang, Yanqing Ma, Ramiro Moro, Lei Ma
Summary: This paper reports a subwavelength chiral metamaterial structure with tunable geometries and compositions for chiral biochemical sample detection. The chiroptical response of the metamaterial can be adjusted by manipulating the number of stacking layers and the twisted angle of the periodic unit. Experimental and numerical analysis reveal that the chiroptical response originates from the optical resonances of the gold disks and the adjacent array layers. The chiral metamaterial can achieve label-free detection of proline in biological samples and enantio-discrimination of chiral molecules, and the transmission circular dichroism (TCD) intensity can be regulated by the analyte concentration.
Article
Optics
Jin-Ping Zhang, Shuo Wang, Niels E. Henriksen
Summary: This article theoretically investigates the optimal field-free molecular orientation achieved by using resonant laser pulses for a given number of populated states. The optimal phase difference between the rotational states can be obtained at full revival times, and the analytical derivation of the phase conditions is provided for multilevel systems (J > 2). The dependence of the phase difference on the duration and absolute area of the laser pulses is analyzed. Finally, the optimal degree of molecular orientation can be achieved by adjusting the ratios of the peak amplitudes of the laser pulses while fulfilling the phase conditions with the carrier-envelope phases or the delay time between the pulses.
Article
Physics, Multidisciplinary
Jie Zhao, Yan-Ting Hu, Yu Lu, Hao Zhang, Li-Xiang Hu, Xing-Long Zhu, Zheng-Ming Sheng, Ion Cristian Edmond Turcu, Alexander Pukhov, Fu-Qiu Shao, Tong-Pu Yu
Summary: The study describes an all-optical method for generating short, energetic positron beams and demonstrates its success through three-dimensional simulations.
COMMUNICATIONS PHYSICS
(2022)
Article
Chemistry, Physical
Ravi Shankar Palani, Michael Mardini, Leo Delage-Laurin, Daniel Banks, Yifu Ouyang, Eric Bryerton, James G. Kempf, Timothy M. Swager, Robert G. Griffin
Summary: In this study, selective 2H labeling of BDPA was utilized to investigate the dynamic nuclear polarization (DNP) mechanism of the Overhauser Effect (OE) in insulating solids. It was found that the alpha and gamma 1H spins on the fluorene rings were responsible for generating a positive bulk polarization, while the phenyl 1H spins contributed negative enhancements that attenuated the OE-DNP. Phenyl-d5-BDPA showed over 50% improvement in OE-DNP enhancement compared to h21-BDPA, achieving a maximum of approximately 90 at 14.1 T and 5 kHz MAS.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Clemens Vittmann, R. Kevin Kessing, James Lim, Susana F. Huelga, Martin B. Plenio
Summary: This study investigates the nonequilibrium dynamics of electron transmission from a straight waveguide to a helix with spin-orbit coupling. Transmission is found to be spin-selective, leading to large spin polarizations of the itinerant electrons. The degree of spin selectivity depends on the width of the interface region, and no polarization is observed for single-point couplings. The study identifies interface structure and conservation of momentum as crucial factors for chiral-induced spin selectivity, and confirms the robustness of this mechanism against static disorder.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Giovanni Bressan, Jasper J. van Thor
Summary: This study presents an analytical expression to describe the orientational part of molecular response, which is evaluated for different conditions. Results obtained in the strong-field conditions suggest that careful analysis of two-dimensional spectroscopic experimental data should include laser pulse intensity considerations.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Optics
Mufeng Zhu, Xuanyang Lai, Linqiang Hua, Xiaojun Liu
Summary: In this study, we numerically solve the time-dependent Schrodinger equation to investigate attosecond pulses synthesized from different circular elliptical bichromatic laser fields. We find that the ellipticity of the attosecond pulse train varies under different laser fields. By analyzing the quantum orbits, we reveal the underlying physics for the generation of nearly circularly polarized attosecond pulses. Our work provides a simple method to obtain highly elliptically polarized attosecond pulses.
Article
Physics, Multidisciplinary
Takashi Imoto, Yuya Seki, Yuichiro Matsuzaki, Shiro Kawabata
Summary: This study proposes a method for suppressing errors in quantum annealing by using inhomogeneous twist operators and determining the optimal twist operator through variational methods. The results show promise in achieving higher energy gaps and robust quantum states against decoherence in practical quantum annealing.
NEW JOURNAL OF PHYSICS
(2022)
Article
Chemistry, Physical
Fei Wang, Zexiang Han, Juehan Sun, Wajid Ali, Xiaoli Wang, Zhiyong Tang
Summary: A twisted stacked metamaterial design is proposed to selectively absorb polarized light, exhibiting high absorbance and a large circular dichroism signal. Simulation results reveal that the high performance of the metamaterial is attributed to the interplay between cavity coupling, magnetic resonances, and plasmonic coupling. This design can be applied in light trapping, chirality sensing, polarized light detection, and polarization enhanced photocatalysis.
Article
Multidisciplinary Sciences
Angelo Montenegro, Chayan Dutta, Muhammet Mammetkuliev, Haotian Shi, Bingya Hou, Dhritiman Bhattacharyya, Bofan Zhao, Stephen B. Cronin, Alexander V. Benderskii
Summary: This experimental study reveals that the dielectric response of interfacial water may deviate from linear response, challenging the traditional view of treating interfacial water as a simple dielectric medium. Vibrational sum-frequency generation spectra show significant asymmetry for negative versus neutral/positive electrode charge conditions.
Article
Optics
Jiafeng Lu, Jing Tian, Bertrand Poumellec, Enrique Garcia-Caurel, Razvigor Ossikovski, Xianglong Zeng, Matthieu Lancry
Summary: Chiral nanostructures in glass can exhibit polarization-selective optical properties, which can be controlled using femtosecond laser direct writing. A phenomenological model based on two-layers phase shifters has been proposed to explain laser-induced optical chirality in initially achiral materials. This model allows for optical rotation in silica glass with the highest value reported in glass to date, providing new opportunities for photonics applications.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Tomoaki Terabayashi, Eiichi Kayahara, Yichen Zhang, Yoshiyuki Mizuhata, Norihiro Tokitoh, Tohru Nishinaga, Tatsuhisa Kato, Shigeru Yamago
Summary: In this study, Mono-alkene-inserted [n]cycloparaphenylenes (CPPs) and Mono-ortho-phenylene-inserted [6]CPP were synthesized through coupling reactions, and it was found that they exhibited Mobius topology in the solid state. Although this structure is often lost in solution, ene-[6]CPP with 1-pyrrolyl groups preserved the Mobius topology even in solution.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Chenglong Jia, Min Chen, Alexander F. Schaeffer, Jamal Berakdar
Summary: Antiferromagnetic materials provide a platform for ultrafast information processing with low cross-talks and compatibility with existing technology. Predicted chiral magnonic eigenmodes in AFM waveguides can be used for multiplex magnonic computing.
NPJ COMPUTATIONAL MATERIALS
(2021)
