Article
Multidisciplinary Sciences
Alex Dikopoltsev, Yonatan Sharabi, Mark Lyubarov, Yaakov Lumer, Shai Tsesses, Eran Lustig, Ido Kaminer, Mordechai Segev
Summary: Photonic time-crystals are spatially homogeneous media that exhibit periodic variations in their electromagnetic susceptibility, leading to temporal reflections and refractions of propagating waves. Free electrons in these crystals spontaneously emit radiation, with a significantly amplified emission process when associated with momentum-gap modes. Quantum interference between spontaneous emission and electron emission into the band modes suppresses the interdependent emission. Therefore, the study of free-electron physics in photonic time-crystals offers a platform to explore various exciting phenomena.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Optics
Haigang Liu, Xianfeng Chen
Summary: This study demonstrates a nonlinear moire effect originating from the moire superlattices of two nonlinear photonic crystals, enabling nondestructive detection with high resolution and period detection range. The detection range of the nonlinear moire effect allows sub-micrometer- and nanometer-scale detection of the nonlinear photonic crystal structure using only an optical microscope. The concept of extending the conventional moire lattice to nonlinear optics can be applied to other fields where nonlinear effects are present.
LASER & PHOTONICS REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Yera Ye. Ussembayev, Noah De Witte, Xiaohong Liu, Alberto Belmonte, Tom Bus, Sjoukje Lubach, Filip Beunis, Filip Strubbe, Albert P. H. J. Schenning, Kristiaan Neyts
Summary: Liquid crystalline polymers are used to create miniature soft robots that can be controlled using light. This study focuses on the manipulation of photoresponsive polymers at the micrometer scale, specifically their rotation and speed control. By using a circularly polarized trapping laser, the polymer particles exhibit uni- and bidirectional rotation, with the rotation rate determined by the optical torque. The angular speed can be controlled by small structural changes induced by UV light absorption. This research provides evidence of motion and speed control in light-responsive polymer particles and opens up possibilities for light-controlled rotary microengines at the micrometer scale.
Article
Chemistry, Physical
Shuo Yang, Baoyuan Xu, Xingwei Feng, Ru Lin, Yuyu Xu, Shunwei Chen, Zifei Wang, Xue Wang, Xiangeng Meng, Zhenhua Gao
Summary: Multicomponent 2D heterostructures with independent spatial modulation are constructed using an organic alloying strategy. This provides opportunities for materials tracking and information security.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Miguel A. Castillo, C. Estevez-Varela, William P. Wardley, R. Serna, I Pastoriza-Santos, S. Nunez-Sanchez, Martin Lopez-Garcia
Summary: Natural photosynthetic photonic nanostructures demonstrate sophisticated light-matter interactions, offering potential for advanced photonic devices; combining NZI materials with natural photonic multilayers enables broad tunable reflectance, slow light absorption enhancement, and tailored photoluminescence properties in the visible spectrum; the tunability of this complex optical response opens up possibilities for developing active devices based on all-polymer and near-zero index materials photonic structures.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Optics
Jorg Imbrock, Dominik Szalek, Simon Laubrock, Haissam Hanafi, Cornelia Denz
Summary: By controlling the temperature and spacing of the seeds with femtosecond laser pulses, specific two-dimensional nonlinear photonic structures can be efficiently formed in lithium niobate crystals.
Article
Optics
Ningning Wang, Shan Liu, Tianxiang Xu, Ruwei Zhao, Tiefeng Xu, Wieslaw Krolikowski, Yan Sheng
Summary: We demonstrate a convenient method for generating structured light at new frequencies using nonlinear diffraction in a nonlinear photonic crystal. By fabricating a 3D crystal with fork-shaped ferroelectric domain gratings and illuminating it with a Gaussian beam, we are able to generate co-propagating second harmonic vortices with opposite topological charges, which subsequently interfere to form Hermite-Gaussian beams in the far field.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Agricultural Engineering
Jiabao Wang, Qian Gao, Yuda Wang, Xinliang Liu, Shuangxi Nie
Summary: In this study, a self-twisted microfluidic chip was designed to prepare orderly arranged nanocellulose and its composite materials. The results showed that this chip significantly improved the mechanical properties of the fiber filaments, increasing their tensile strength and Young's modulus, and the mechanical properties were 150% higher compared to previous methods of filament preparation.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Chemistry, Physical
Jinying Bao, Zizheng Wang, Chen Shen, Rui Huang, Chenjie Song, Zhaozhong Li, Wei Hu, Ruochen Lan, Lanying Zhang, Huai Yang
Summary: "The design and fabrication of freestanding chiro-photonic crystal film with color-changing ability across the visible light spectrum is beneficial for anticounterfeiting technology and smart labels. By utilizing a newly synthesized light-responsive molecular motor functionalized with cholesterol, a novel light-controlled photonic crystal is prepared, offering potential applications in encrypted communication and counterfeit prevention."
Article
Materials Science, Multidisciplinary
Shan Liu, Lei Wang, Leszek Mazur, Krzysztof Switkowski, Bingxia Wang, Feng Chen, Ady Arie, Wieslaw Krolikowski, Yan Sheng
Summary: Nonlinear photonic crystals (NPCs) with spatially modulated second-order nonlinear coefficients have been fabricated in ferroelectric crystals using the femtosecond laser writing technique. However, the efficiency of nonlinear interactions in 3D NPCs has been low. This study overcomes the fabrication challenges to achieve significant improvement in efficiency and presents a general approach of structural simplification.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Physical
Jeronimo Buencuerpo, Theresa E. Saenz, Mark Steger, Michelle Young, Emily L. Warren, John F. Geisz, Myles A. Steiner, Adele C. Tamboli
Summary: Ultrathin solar cells, with one order of magnitude smaller thickness compared to conventional cells, reduce material usage and allow the use of lower-quality materials. Efficient photonic light-trapping is required to compensate for the limited absorber thickness. Quasi-random photonic crystals, which are more robust under angle and thickness variations, are predicted to provide high efficiency light-trapping. In this study, we experimentally demonstrate the use of quasi-random photonic crystals fabricated by polymer blend lithography for light-trapping in ultrathin GaAs cells, achieving an efficiency of 22.35% under the global solar spectrum.
Article
Materials Science, Ceramics
Jie Chen, Tiantian Wang, Xiangfu Wang
Summary: A method to synergistically control the light extraction efficiency (LEE) of GaN-based LEDs by combining complex-period photonic crystals (PhCs) with M (M = Al, In) material doping is proposed. By doping M, the LED emission wavelength range can be regulated to achieve dual-band emission. Furthermore, a triangular complex-period photonic structure is introduced to establish stacked or etched PhCs models. The optimal LEEs achieved are 19.08% and 13.96% for blue light and ultraviolet, respectively, which are larger than that of traditional flat-panel LED (4%).
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Optics
Kazuhiro Kuruma, Hironobu Yoshimi, Yasutomo Ota, Ryota Katsumi, Masahiro Kakuda, Yasuhiko Arakawa, Satoshi Iwamoto
Summary: This study reports single-photon sources using single quantum dots embedded in topological slow light waveguides based on valley photonic crystals. The experiment demonstrates Purcell-enhanced single-photon emission in a topological slow light mode with a group index over 20, showing robust propagation even under sharp bends.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Shiyin Jia, Renwen Huang, Junzheng Hu, Yao Jiang, Hui Huang, Biye Xie, Minghui Lu, Peng Zhan, Yanfeng Chen, Zhenlin Wang
Summary: A facile approach to achieve flexible control of light-steering based on symmetrized wave profiles of topological corner states is introduced, which allows for controllable excitation and coding technique via controllable excitation of topological corner states. Additionally, an effective way to achieve direction-selective excitation of topological edge states without circularly polarized sources is proposed. This offers a reliable technique to modulate higher-order topological boundary states while maintaining the photonic structure, providing a practical alternative for flexible manipulation of light in integrated topological photonic devices with fixed configuration.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Physical
Siew Yee Lim, Carina Hedrich, Lin Jiang, Cheryl Suwen Law, Manohar Chirumamilla, Andrew D. Abell, Robert H. Blick, Robert Zierold, Abel Santos
Summary: Spectrally tunable nanoporous anodic alumina distributed Bragg reflectors (NAA-DBRs) modified with titanium dioxide (TiO2) coatings were used as optoelectronic platforms to utilize slow light for photocatalysis. The performance of the photocatalysts is influenced by the spectral position of the photonic stop band (PSB) and thickness of the semiconductor, with optimal performance achieved when the red edge of the PSB is close to the red or blue boundary of the absorbance band of methylene blue (MB).
Letter
Optics
Sivan Trajtenberg-Mills, Irit Juwiler, Ady Arie
LASER & PHOTONICS REVIEWS
(2015)
Article
Optics
Liran Naor, Shani Sharabi, Irit Juwiler, Ady Arie
Article
Optics
Sivan Trajtenberg-Mills, Irit Juwiler, Ady Arie
Letter
Optics
Asia Shapira, Irit Juwiler, Ady Arie
LASER & PHOTONICS REVIEWS
(2013)
Article
Materials Science, Multidisciplinary
David Eger, Gil Atar, Ariel Bruner, Bruno Sfez, Irit Juwiler, Temmu Kokki, Pekka Kykkanen
Correction
Optics
Asia Shapira, Roy Shiloh, Irit Juwiler, Ady Arie
Article
Optics
Asia Shapira, Roy Shiloh, Irit Juwiler, Ady Arie
Article
Optics
Keren Shemer, Noa Voloch-Bloch, Asia Shapira, Ana Libster, Irit Juwiler, Ady Arie
Article
Physics, Multidisciplinary
Shani Sharabi, Noa Voloch-Bloch, Irit Juwiler, Ady Arie
PHYSICAL REVIEW LETTERS
(2014)
Article
Engineering, Electrical & Electronic
Motti Haridim, Liran Afrimov, Benny Milgrom, Evgeny Zalmanovich, Amir Gamliel, Irit Juwiler
Summary: This work examines the impact of spectral narrowing on 43Gb/s NRZ-DPSK signals and proposes the use of delay line interferometers (DLI) to optimize the performance of ROADM devices. By simulating different BPF bandwidth and FSR values, improvements in bit error ratio are achieved.
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
(2021)
Review
Environmental Sciences
Vladimir V. Belov, Irit Juwiler, Nathan Blaunstein, Mikhail V. Tarasenkov, Egor S. Poznakharev
Article
Optics
Giuseppe Di Domenico, Shaul Pearl, Aviv Karnieli, Sivan Trajtenberg-Mills, Irit Juwiler, Hagai S. Eisenberg, Ady Arie
Summary: This study proposes and demonstrates two simple, compact, and robust methods to directly generate path-entangled N00N states with N=2. These methods exhibit high coincidence count rates for the detection of N00N states and show the characteristics of super-resolution.
Article
Multidisciplinary Sciences
Ofir Yesharim, Shaul Pearl, Joshua Foley-Comer, Irit Juwiler, Ady Arie
Summary: Nonlinear holography shapes the amplitude and phase of new harmonics using nonlinear processes, which has significant impact in various areas of optics. In this study, the concept of nonlinear holography is extended to the quantum regime, where the spatial quantum correlations of entangled photon pairs are directly shaped in two-dimensional patterned nonlinear photonic crystals. These quantum states exhibit quantum correlations and violate the Clauser-Horne-Shimony-Holt inequality, enabling entanglement-based quantum key distribution. This demonstration opens up possibilities for controllable on-chip quantum optics schemes using spatial degree of freedom.
Article
Optics
Kobi Aflalo, Moshe Ben-David, Adrian Stern, Irit Juwiler
