Article
Optics
Yunfeng Jiang, Wenlei Yu, Kehao Zeng
Summary: Arbitrary shaped abruptly autofocusing beam (AAB) with initial launch angle modulation is proposed and demonstrated in this paper. Usually, arbitrary shaped Airy beams constructed by substituting various shape functions into circular model lack abruptly autofocusing properties. The modulation of initial launch angles is necessary for these beams to regain abruptly autofocusing properties. The rectangle, star, and ellipse shaped AAB are mainly investigated in this paper, and other shaped AAB can be constructed using a similar method.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Houan Teng, Yixian Qian, Yanping Lan, Yiming Cai
Summary: This study demonstrates a new family of autofocusing beams called circular swallowtail beams (CSBs), based on high-order swallowtail catastrophe, which automatically focus without external components. CSBs have more diversity and tunability compared to previous beams, making them potentially beneficial for flexible optical manipulation. These diverse CSBs could have new applications in optical trapping, medical treatment, or micromachining.
Article
Optics
Na Xiao, Chen Xie, Erse Jia, Jiaying Li, Remo Giust, Francois Courvoisier, Minglie Hu
Summary: The research proposes an effective scheme to interpret the abruptly autofocusing vortex beam, with analytical formulae accurately predicting its focusing properties. The analytical results are in excellent agreement with numerical simulation and experimental results, and the technique can be applied for fine manipulation of focusing properties with a scaling factor, benefiting applications such as particle trapping and micromachining.
Article
Optics
Xiang Zang, Wensong Dan, Yimin Zhou, Han Lv, Fei Wang, Yangjian Cai, Guoquan Zhou
Summary: In this paper, a novel kind of abrupt autofocusing beams, namely the generalized circular Airy derivative beams (CADBs) are introduced as an extension of circular Airy beam (CAB). The CADBs exhibit stronger autofocusing ability compared to the CAB and have smaller focal spot size.
Article
Physics, Applied
You Wu, Zejia Lin, Chuangjie Xu, Danlin Xu, Haiqi Huang, Jiajia Zhao, Zhenwu Mo, Junjie Jiang, Haobin Yang, Liping Zhang, Hongzhan Liu, Dongmei Deng, Lingling Shui
Summary: In this study, versatile twisted optical bottles (TOBs) generated from abruptly autofocusing beams are investigated. The relationship between the rotation of TOBs and their properties is experimentally validated. Stable mesocarbon particles trapped by TOB beams are observed successfully.
PHYSICAL REVIEW APPLIED
(2022)
Article
Physics, Applied
Yuandiang Peng, Xiaolin Wu, Pingwei Liu, Kaiwen Yi, Dongmei Deng, Weiyi Hong
Summary: This study reports a new type of abruptly autofocusing induced by defocusing nonlinearity, where adjusting the variable function allows for simultaneous intensity and position control. This discovery represents the first theoretical realization of abruptly autofocusing behavior induced by defocusing nonlinearity, with potential applications in optical tweezers and optical switches.
APPLIED PHYSICS EXPRESS
(2021)
Article
Optics
Menglin Wu, Shuqing Lin, Yujie Chen
Summary: This work introduces and demonstrates a method for tailoring multi-focus abruptly autofocusing beams in free space. It allows for direct and independent adjustment of the number, positions, and relative intensity of foci by controlling the design of abruptly autofocusing beams. The study also explores the relationship between the size of the light field and the characteristics of focus. By utilizing the double-phase hologram method, the required complex field is generated using a phase-only spatial light modulator in experiments, providing flexible control over the characteristics of foci and expanding potential applications of autofocusing beams.
Article
Optics
[Anonymous]
Summary: This paper investigates the free-space propagation dynamics of circular Airyprime vortex beam (CAPVB) embedded with an optical vortex (OV), and examines the effects of topological charge and singularity position on its autofocusing ability and focus position. Experimental results demonstrate the theoretical findings and show that CAPVB has the ability to produce various special focus intensity patterns and carry orbital angular momentum.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Physical
Erse Jia, Chen Xie, Yue Yang, Na Xiao, Minglie Hu
Summary: Micro-fabrication based on structured-beam-assisted Two-Photon Polymerization (2 PP) is a rapid and flexible method for manufacturing microstructures with complex morphologies. The tunable Abruptly Autofocusing Vortex (AAFV) beams were designed and generated using a single-phase-only Spatial Light Modulator (SLM). These beams were used to fabricate a bowl-shaped Three-Dimensional (3D) micro-trap array via 2 PP with a one-step exposure technique. The fabricated microstructures can trap and spatially position micro-particles with different diameters, showing potential applications in fiber optics and cell study.
Article
Optics
Zewen Wang, Qi Li, Fei Yan
Summary: This study proposes a design strategy for generating broadband terahertz ring-Airy beams using a transparent all-silicon metasurface. The amplitude and phase of the transmitted beam can be modulated by controlling the rotation angles of silicon pillars. The metasurface has a high transmission efficiency and exhibits abruptly autofocusing properties in the frequency range of 2.12 to 2.72 THz.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
Jinggui Zhang, Yajuan Tian, Yunwu Xu
Summary: In this paper, a novel class of circular Butterfly-Gaussian beams (BGB) is introduced, and the propagation behaviors in linear media are investigated both analytically and numerically. The results show that circular BGB exhibits abruptly autofocusing behavior similar to circular Airy field and Pearcey field. The autofocusing distance is found to be equal to that of circular Pearcey beam, and the rapid oscillation after the focal point is completely eliminated. The study further reveals that the autofocusing behaviors can be controlled by adjusting the distribution factor and optical vortices. It is expected that circular BGB can offer a new method in optical micromanipulation and trapping.
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
(2023)
Article
Mathematics, Interdisciplinary Applications
Shangling He, Boris A. Malomed, Dumitru Mihalache, Xi Peng, Xing Yu, Yingji He, Dongmei Deng
Summary: In this study, we introduced axisymmetric Airy-Gaussian vortex beams in an optical system based on the (2+1)-dimensional fractional Schrodinger equation with Levy index (LI) ranging from 1 to 2. By utilizing numerical methods, we investigated the propagation dynamics of these beams with vorticities ranging from 0 to 4, observing abrupt autofocusing followed by rebound from the center. The study demonstrated that properties of autofocusing dynamics, such as focusing distance, spot radius, and peak intensity, are determined by LI, relative width of Airy and Gaussian factors, and vorticity, with peak intensity reaching maximum at intermediate values of LI near alpha = 1.4.
CHAOS SOLITONS & FRACTALS
(2021)
Article
Optics
Wenxuan Wang, Zhiwei Mi, Liping Zhang, Benyi Wang, Kezhen Han, Chengxin Lei, Zhongsheng Man, Xiaolu Ge
Summary: This paper investigates the abruptly autofocusing characteristics of the circular Airyprime beam (CAPB) propagating in a chiral medium for the first time. The results show that the CAPB splits into left-handed circularly polarized (LCP) and right-handed circularly polarized (RCP) beams with different propagating trajectories in the chiral medium. By adjusting the initial beam parameters and chiral medium parameter, the focal length and peak intensity of the focal field spots can be effectively controlled. The autofocusing ability of CAPB is about 7 times that of another beam under the same condition in the chiral medium.
OPTICS COMMUNICATIONS
(2023)
Article
Oceanography
Xingchi Wang, Tobias Kukulka
Summary: The study investigates the impact of turbulence driven by wind and waves on the transport of heat, momentum, and matter in the ocean surface boundary layer (OSBL). The experiments reveal a three-stage response of the OSBL to abrupt changes in wind direction, with different characteristics such as decreased turbulent kinetic energy (TKE), increased TKE, and eventual relaxation to equilibrium, while Langmuir turbulence (LT) continues to adjust due to slowly developing waves.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2021)
Proceedings Paper
Optics
Menglin Wu, Shuqing Lin, Yujie Chen
Summary: This study presents an alternative method for constructing multi-focus abruptly autofocusing beams (MFAAFBs) by designing AAFBs for each focus and superimposing wavefronts in spatial domain. The ability to manipulate the beam trajectory and focal point positions is demonstrated, along with discussions on experimental means to generate MFAAFBs.
TWELFTH INTERNATIONAL CONFERENCE ON INFORMATION OPTICS AND PHOTONICS (CIOP 2021)
(2021)
Article
Physics, Multidisciplinary
Daohong Song, Daniel Leykam, Jing Su, Xiuying Liu, Liqin Tang, Sheng Liu, Jianlin Zhao, Nikolaos K. Efremiths, Jingjun Xu, Zhigang Chen
PHYSICAL REVIEW LETTERS
(2019)
Review
Optics
Nikolaos K. Efremidis, Zhigang Chen, Mordechai Segev, Demetrios N. Christodoulides
Article
Optics
Ze Zhang, Xinli Liang, Mihalis Goutsoulas, Denghui Li, Xiuting Yang, Shupeng Yin, Jingjun Xu, Demetrios N. Christodoulides, Nikolaos K. Efremidis, Zhigang Chen
Article
Optics
Michael Goutsoulas, Domenico Bongiovanni, Denghui Li, Zhigang Chen, Nikolaos K. Efremidis
Article
Optics
Domenico Bongiovanni, Denghui Li, Mihalis Goutsoulas, Hao Wu, Yi Hu, Daohong Song, Roberto Morandotti, Nikolaos K. Efremidis, Zhigang Chen
Summary: This study demonstrates free-space pin-like optical vortex beams with tunable peak intensity and robust antidiffracting propagation. By modulating the amplitude and phase profile of a laser beam, these beams exhibit unique autofocusing dynamics and morph into a high-order Bessel-like profile during propagation. The peak intensity evolution of these beams is controlled by the impressed amplitude structure, representing a novel property with potential applications.
PHOTONICS RESEARCH
(2021)
Article
Physics, Multidisciplinary
Nikolaos K. Efremidis, Demetrios N. Christodoulides
Summary: In this study, the authors investigate the thermodynamic optical pressure in tight-binding nonlinear multimode photonic systems by means of statistical mechanics. They derive simple closed-form expressions for the exerted thermodynamic pressures and find that their theoretical results are in agreement with numerical computations. This study may contribute to a deeper understanding of radiation forces in multimode optomechanical systems and open up new avenues for their utilization.
COMMUNICATIONS PHYSICS
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Huizhong Ren, Fan O. Wu, Pawel Jung, Nikolaos K. Efremidis, Mercedeh Khajavikhan, Demetrios N. Christodoulides
Summary: The new scaling law establishes a relationship between thermodynamic pressure and electrodynamic forces in multimode nonlinear dielectric waveguides, and the results are in exact agreement with those obtained using the Maxwell stress tensor formalism.
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2021)
Article
Optics
Nikolaos K. Efremidis
Summary: The study on the coupling process of Su-Schrieffer-Heeger lattice surface modes reveals the effective excitation of surface modes by launching light on specific waveguides. A simplified model is developed for capturing the dynamics of surface modes in the presence of Kerr nonlinearity, showing accurate results for small or moderate nonlinearities. However, strong nonlinearity can lead to chaotic behavior and the excitation of bulk modes, masking the signature of surface modes.
Article
Optics
Nikolaos K. Efremidis, Demetrios N. Christodoulides
Summary: The study investigates the statistical behavior of multimoded optical systems under equilibrium conditions, examining the role of variations of system parameters in thermodynamic description and deriving an optical analog of the first law of thermodynamics, a generic expression for work done to the system, and an optical Gibbs-Duhem equation. Focusing on two-dimensional photonic lattices, the conditions under which the entropy in waveguide arrays can be considered extensive are studied, with small deviations from extensivity resulting in stress and strain terms. Conservation laws in array configurations are examined to understand the effects of variations in system parameters, along with analysis of respective thermodynamic processes such as isentropic and Joule-type expansions.
Article
Optics
Michael Goutsoulas, Nikolaos K. Efremidis
Summary: The study focuses on the dynamics of electron beams that are self-accelerating in free space and in the presence of an additional magnetic field, with specific attention to Airy beams and power-law trajectories. It explores the interaction between beam self-acceleration and circular motion caused by the magnetic field. Using an integral representation, closed-form solutions for the electron wave function are found, along with asymptotic formulas for beam trajectories, and ray optics is useful for interpreting beam dynamics. The results are in excellent agreement with direct numerical simulations.
Proceedings Paper
Engineering, Electrical & Electronic
Denghui Li, Domenico Bongiovanni, Mihalis Goutsoulas, Yi Hu, Daohong Song, Roberto Morandotti, Nikolaos K. Efremidis, Zhigang Chen
2020 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Domenico Bongiovanni, Denghui Li, Mihalis Goutsoulas, Roberto Morandotti, Daohong Song, Nikolaos K. Efremidis, Yi Hu, Zhigang Chen
2020 IEEE PHOTONICS CONFERENCE (IPC)
(2020)
Article
Optics
Denghui Li, Domenico Bongiovanni, Michael Goutsoulas, Shiqi Xia, Ze Zhang, Yi Hu, Daohong Song, Roberto Morandotti, Nikolaos K. Efremidis, Zhigang Chen
Proceedings Paper
Engineering, Electrical & Electronic
Ze Zhang, Xinli Liang, Mihalis Goutsoulas, Nikos Efremidis, Zhigang Chen
2019 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2019)
Article
Optics
A. Roussou, J. Smyrnakis, M. Magiropoulos, N. K. Efremidis, W. von Klitzing, G. M. Kavoulakis
