Article
Multidisciplinary Sciences
Fan Nan, Xiao Li, Shuailong Zhang, Jack Ng, Zijie Yan
Summary: This study reports the stable optical trapping and switchable optical rotation of nanoparticle-assembled micromotors with programmed phase of light. By imprinting customized phase gradients into a circularly polarized flat-top laser beam, the researchers were able to trap and assemble metal nanoparticles into reconfigurable clusters, allowing for direction-switchable and magnitude-tunable optical torque.
Review
Optics
Yuanjie Yang, Yu-Xuan Ren, Mingzhou Chen, Yoshihiko Arita, Carmelo Rosales-Guzman
Summary: Optical trapping is a technique that manipulates micro-objects using the interaction between light and matter, with optical tweezers being a powerful tool widely used in various fields. Recent advances in using structured light beams in optical trapping have opened up new possibilities for manipulation research in different environments.
ADVANCED PHOTONICS
(2021)
Article
Physics, Multidisciplinary
Bingjie Li, Yujie Xin, Xuyue Guo, Xinhao Fan, Sheng Liu, Jianlin Zhao, Peng Li
Summary: This work demonstrates a robust construction of focal fields with laterally variant optical spin angular momentum using a monolayer dielectric metalens. The gradation of optical helicity in the line focus can induce a chirality-sensitive lateral force for chiral particles.
FRONTIERS IN PHYSICS
(2022)
Article
Multidisciplinary Sciences
Yaolong Li, Pengzuo Jiang, Xiaying Lyu, Xiaofang Li, Huixin Qi, Jinglin Tang, Zhaohang Xue, Hong Yang, Guowei Lu, Quan Sun, Xiaoyong Hu, Yunan Gao, Qihuang Gong
Summary: In this study, the authors characterized the near-field dielectric modes and photoemission properties of insulating hexagonal boron nitride structures using time-resolved photoemission electron microscopy (TR-PEEM). They revealed static vector near-field vortices with different topological charges and the spatiotemporal evolution of waveguide modes in a low-loss dielectric planar waveguide. Their approach provides a strategy for the realization of flat photoemission emitters.
NATURE COMMUNICATIONS
(2023)
Article
Optics
Redha H. Al Ibrahim, Shuiqin Zheng, Tien Khee Ng, Boon S. Ooi
Summary: This paper presents an optical image rotation system based on orbital angular momentum (OAM) manipulation, which includes OAM decomposition and OAM combination functions. The study shows that OAM spectrum manipulation for image rotation is equivalent to the one-dimensional movement of one of the optical elements, suggesting that rotation angle adjustment can be achieved not only by element rotation but also by linear translation of the optical elements.
Article
Materials Science, Multidisciplinary
A. F. Alharbi, A. Lyras, Vassilis E. Lembessis, Omar Al-Dossary
Summary: This paper investigates the interaction between atoms and Laguerre-Gaussian beams, focusing on the vortex center where an annular nodal area exists. The results for the quadrupole transition in Ca+ are compared with experimental data, confirming the accuracy of the proposed method. Additionally, selection rules for single-electron transitions in two-electron atomic systems are derived.
RESULTS IN PHYSICS
(2023)
Article
Physics, Applied
Qiao Jiang, Hong Xiang, Dezhuan Han
Summary: This study proposes a method to design a plasmonic metasurface that can control the generation and superposition of surface plasmon polariton (SPP) vortices, demonstrating that the superposition of SPP vortices can be accurately controlled by the polarization states of the incidence, providing a feasible way to design miniaturized photonic devices.
APPLIED PHYSICS LETTERS
(2021)
Review
Physics, Multidisciplinary
Graham D. Bruce, Paloma Rodriguez-Sevilla, Kishan Dholakia
Summary: This article discusses the fastest-spinning man-made object, the smallest wind-up motor, and how torque exerted by light can be used to rotate optically trapped particles. The principles, limitations, and potential applications of this technology are detailed in the review.
ADVANCES IN PHYSICS-X
(2021)
Article
Astronomy & Astrophysics
J. M. Joel Ong, Lisa Bugnet, Sarbani Basu
Summary: This article investigates the effects of rotation on the splitting of internal vibrational modes in stars and the resulting resonance phenomena. Using new developments in the theory of mixed-mode coupling, the researchers discover that near-degenerate mixed-mode pairs can exhibit asymmetric rotational splitting, particularly when pure p-modes and pure g-modes are in resonance. They explore the observational consequences of this asymmetrical splitting and propose improved measurement techniques for rotational characterization.
ASTROPHYSICAL JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
Yuval Yifat, John Parker, Tian-Song Deng, Stephen K. Gray, Stuart A. Rice, Norbert F. Scherer
Summary: This paper demonstrates tracking the spinning and orbital motion of optically trapped objects using the diagonal ratio of the quadrant photodiode, which provides enhanced sensitivity compared to conventional transverse ratio measurements and reveals additional information about particle dynamics. This method allows for noise reduction and increased sensitivity of rotating nanospheres, leading to potential applications in controlling the orientational dynamics of trapped nanoparticles, such as nanoscale mechanical motors.
Article
Optics
Johannes Bloechl, Johannes Schoetz, Ancyline Maliakkal, Natalija Sreibere, Zilong Wang, Philipp Rosenberger, Peter Hommelhoff, Andre Staudte, Paul B. Corkum, Boris Bergues, Matthias F. Kling
Summary: In this study, we introduce a method for sampling the optical field by utilizing the enhanced near-field of a nanometric needle tip. This method provides reliable characterization of the spatial distribution and temporal evolution of visible light fields, as well as the resolution of the wavefront and orbital angular momentum of light pulses. The method is also polarization sensitive and applicable to vectorial field reconstruction.
Article
Optics
Mohamed El Ketara, Hirokazu Kobayashi, Etienne Brasselet
Summary: This study reveals vectorial optomechanical effects mediated by the material anisotropy and the longitudinal field component inherent to real-world beams. Experimental verification on an elastic anisotropic medium prone to exhibit a sensitive and reversible effect, a nematic liquid crystal, demonstrates a feasible alternative approach to limit irreversible damaging methods.
Article
Optics
Li -Ping Yang
Summary: The polarization vectors of light in a coiled optical fiber rotate around its axis of propagation even without birefringence, which can be explained by the Pancharatnam-Berri phase of spin-1 photons. A geometric method is used to understand this rotation and it is shown that similar geometric rotations also occur in twisted light with orbital angular momentum. The corresponding geometric phase has applications in photonic quantum computation and quantum sensing based on orbital angular momentum states.
Article
Chemistry, Physical
Benjamin L. Augenbraun, Sean Burchesky, Andrew Winnicki, John M. Doyle
Summary: This study presents a detailed laser spectroscopic study on the transitions of calcium(I) phenoxide. The rotational band systems are analyzed, and the structure of calcium monophenoxide is compared to other calcium radicals. This work shows the potential application of functionalizing aromatic molecules for laser-based control.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Jian Chen, Chenhao Wan, Andy Chong, Qiwen Zhan
Summary: This study experimentally generated cylindrically polarized wavepackets with transverse orbital angular momentum, demonstrating the coexistence of spatiotemporal optical vortex with spatial polarization singularity. The results extend the scope of spatiotemporal wavepacket research and pave the way for applications in various fields such as light-matter interaction, optical tweezers, spatiotemporal spin-orbit angular momentum coupling, etc.
Article
Chemistry, Physical
Hyobin Yoo, Rebecca Engelke, Stephen Carr, Shiang Fang, Kuan Zhang, Paul Cazeaux, Suk Hyun Sung, Robert Hoyden, Adam W. Tsen, Takashi Taniguchi, Kenji Watanabe, Gyu-Chul Yi, Miyoung Kim, Mitchell Luskin, Ellad B. Tadmor, Efthimios Kaxiras, Philip Kim
Article
Materials Science, Multidisciplinary
Youngbin Tchoe, Kunook Chung, Keundong Lee, Janghyun Jo, Kyungmin Chung, Jerome K. Hyun, Miyoung Kim, Gyu-Chul Yi
NPG ASIA MATERIALS
(2019)
Article
Chemistry, Multidisciplinary
Jayeong Kim, Yujin Jang, Nam-Jung Kim, Heehun Kim, Gyu-Chul Yi, Yukyung Shin, Myung Hwa Kim, Seokhyun Yoon
FRONTIERS IN CHEMISTRY
(2019)
Article
Chemistry, Physical
Arpana Agrawal, Joon Young Park, Pratima Sen, Gyu-Chul Yi
APPLIED SURFACE SCIENCE
(2020)
Article
Nanoscience & Nanotechnology
Dong Won Yang, Keundong Lee, Suhee Jang, Won Jun Chang, Su Han Kim, Jae Hyung Lee, Gyu-Chul Yi, Won Il Park
Article
Materials Science, Multidisciplinary
Youngbin Tchoe, Janghyun Jo, HoSung Kim, Heehun Kim, Hyeonjun Baek, Keundong Lee, Dongha Yoo, Won Jun Choi, Miyoung Kim, Gyu-Chul Yi
Summary: This study demonstrates the monolithic integration of InAs nanorods and ZnO nanotubes using a multilayer graphene film as the substrate, leading to the fabrication of dual-wavelength photodetectors. The hybrid nanostructures, grown by metal-organic vapor-phase epitaxy and molecular beam epitaxy, show sensitivity to both ultraviolet and mid-infrared wavelengths, as verified by transmission electron microscopy, spectral photoresponse analysis, and current-voltage measurements.
NPG ASIA MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Minho S. Song, Hyeonjun Baek, Keundong Lee, Dongha Yoo, Kunook Chung, Jamin Lee, Hyungseok C. Moon, Byung Hun Lee, Hye Yoon Park, Gyu-Chul Yi
Summary: The experiment demonstrates the use of gallium nitride microrods for cell labeling, showing that the microrods taken up via endocytosis can maintain normal cellular activities and exhibit sharp laser emission peaks.
NPG ASIA MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Young Joon Hong, Rajendra K. Saroj, Won Il Park, Gyu-Chul Yi
Summary: This Perspective provides a review of current research activities on one-dimensional semiconductor nanostructures grown on two-dimensional nanomaterials for flexible electronic and optoelectronic device applications. The combination of excellent material characteristics of 1D nanostructures and good properties of 2D layers holds great potential for a wide range of applications in optoelectronics and electronics.
Article
Materials Science, Multidisciplinary
Puspendu Guha, Joon Young Park, Janghyun Jo, Yunyeong Chang, Hyeonhu Bae, Rajendra Kumar Saroj, Hoonkyung Lee, Miyoung Kim, Gyu-Chul Yi
Summary: We report on the heteroepitaxial growth of Sb2Te3-Bi2Te3 lateral heterostructures using molecular beam epitaxy. The lateral heterostructures were fabricated by growing Bi2Te3 islands on graphene substrates and laterally growing Sb2Te3 on the side facets of the nanostructures. Electron microscopy techniques and first-principles calculations were used to study the interface and topological properties of the heterostructures.
Article
Materials Science, Multidisciplinary
Anuj Kumar Singh, Kwangseok Ahn, Dongha Yoo, Seokje Lee, Asad Ali, Gyu-Chul Yi, Kunook Chung
Summary: In this study, we achieved van der Waals integration of micropatterned GaN LEDs onto foreign graphene films. The transferred LEDs showed reliable device performances and adhesive properties, allowing for wearability and homogeneous light emission under various bending conditions.
NPG ASIA MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Rajendra K. Saroj, Puspendu Guha, Sangmin Lee, Dongha Yoo, Eunsu Lee, Jamin Lee, Miyoung Kim, Gyu-Chul Yi
Summary: A study on the selective growth of hexagonal GaSe film on prepatterned graphene substrate and fabrication of photodetector array is presented. The growth behavior of GaSe and the performance of the fabricated GaSe-based photodetectors are investigated. The findings reveal the potential applications of GaSe in optoelectronic devices.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Physics, Applied
Shih-Po Chien, Yu-Chen Chang, Kristan Bryan Simbulan, Shantanu Saha, Yu-Fan Chiang, Rajendra K. Saroj, Gyu-Chul Yi, Shamsul Arafin, Ting-Hua Lu, Yann-Wen Lan
Summary: This study investigates the effects of polarized light on the optical properties of h-BN phonon modes using polarized Raman spectroscopy. The polarization-resolved Raman spectra reveal the symmetrical and broken symmetry nature of degenerate phonon modes induced by linearly and elliptically polarized light, respectively. Furthermore, a helicity exchange is observed between circularly polarized excitation and the resulting opposite circular polarization of scattered light from h-BN.
APPLIED PHYSICS LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Hyeong-Yong Hwang, Hyeonjun Baek, Gyu-Chul Yi, Young-Dahl Jho
Summary: Strain occurs spontaneously at the interfaces of crystalline materials and needs a suitable characterization scheme to analyze multiple interfaces. Through the experiment, we found that surface strain has a stronger influence on photoluminescence spectra than quantum confinement effect. Particularly in the strongly tapered region, increasing surface strain leads to a significant increase in photoluminescence shift, which matches the analysis based on surface to volume ratio. Additionally, surface strain dependence on temperature contrasts with the temperature-invariant characteristics of quantum confinement.
Article
Multidisciplinary Sciences
Hongseok Oh, Gyu-Chul Yi, Michael Yip, Shadi A. Dayeh
Article
Multidisciplinary Sciences
Arpana Agrawal, Gyu-Chul Yi
