2021 ANNUAL REPORT | Bar-Ilan Institute of Nanotechnology & Advanced Materials

114 Prof. Zalevsky Zeev Dean Faculty of Engineering Member of BINA Nano-Photonics Center Research Areas • Super resolution • Nano-photonics • In-fiber devices • Fiber optics • Optical data processing • Diffractive optical elements and beam shaping • 3-D estimation • RF-photonics Abstract Topic 1 Nano Photonics and Plasmonics The ability to control the energy flow of light at the nanoscale is fundamental to modern communication and bigdata technologies, as well as quantum information processing schemes. However, since photons are diffraction-limited, efforts of confining them to dimensions of integrated electronics have so far proven elusive. A promising way to facilitate nanoscale manipulation of light is through plasmon polaritons—coupled excitations of photons and charge carriers. These tightly confined hybrid waves can facilitate compression of optical functionalities to the nanoscale but suffer from huge propagation losses that limit their use to mostly subwavelength scale applications. With only weak evidence of macroscale plasmon polaritons, propagation has recently been reported theoretically and indirectly, no experiments so far have directly resolved long-range propagating optical plasmons in real space. Here, we launch and detect nanoscale optical signals, for record distances in a wireless link based on novel plasmonic nanotransceivers. We use a combination of scanning probe microscopies to provide high resolution real space images of the optical near fields and investigate their long-range propagation principles. We design our nanotransceivers based on a high-performance nanoantenna, Plantenna, hybridized with channel plasmon waveguides with a crosssection of 20 nm × 20 nm, and observe propagation for distances up to 1000 times greater than the plasmon wavelength. We experimentally show that our approach Prof. Zadok Avi Faculty of Engineering Member of BINA Nano-Photonics Center Research Areas • Fiber optics sensing • Silicon Photonics • Nonlinear Optics • Wafer Bonding • Optical Communication Abstract Fiber optics and integrated photonic devices The research group of Prof. Zadok is working on two main themes: Optical fibers, and photonic integrated circuits. On the fibers side, the group focuses on sensor applications: the use of optical fibers for the mapping of quantities of interest such as temperature, strain, and various chemicals. The group is pioneering a new sensor concept based on the combination of light and sound waves, which supports measurements outside the fiber boundaries where light cannot reach. On the devices side, the group specializes in photonic integrated circuits in silicon and glass, for data communication and sensing purposes. Examples include multiplexers for dense wavelength division communication, and narrowband radio-frequency filters. Here too, the group relies on interactions between light and sound waves to achieve performance that is unattainable using light alone. Top-view microscope image of a surface acoustic wave-photonic device in standard silicon on insulator Publications 2020 and 2021 • Hilel Hagai Diamandi, Gil Bashan, Yosef London, Keren Shemer, Kavita Sharma, Elad Zehavi, Avi Zadok. “Vector Properties of Forward Stimulated Brillouin Scattering in Standard Single-Mode Fibers”. Nonlinear Optics, NW2B. 4, 2021. • Yosef London, Kavita Sharma, Hagai Diamandi, Mirit Hen, Gil Bashan, Elad Zehavi, Shlomi Zilberman, Garry Berkovic, Amnon Zentner, Moshe Mayoni, Andrei A Stolov, Mikhail Kalina, Olga Kleinerman, Ehud Shafir, Avi Zadok. “Opto-Mechanical Fiber Sensing of Gamma Radiation”. Journal of Lightwave Technology, 2021. • Gil Bashan, Hilel Hagai Diamandi, Yosef London, Kavita Sharma, Keren Shemer, Elad Zehavi, Avi Zadok. “Forward stimulated Brillouin scattering and optomechanical non-reciprocity in standard polarization maintaining fibres”. Light: Science & Applications, 2021. • Moshe Katzman, Dvir Munk, Maayan Priel, Etai Grunwald, Mirit Hen, Naor Inbar, Moshe Feldberg, Tali Sharabani, Roy Zektzer, Gil Bashan, Menachem Vofsi, Uriel Levy, Avi Zadok. “Surface acoustic microwave photonic filters in standard silicon-on-insulator”. Optica, 2021. • Hilel Hagai Diamandi, Yosef London, Gil Bashan, Keren Shemer, Avi Zadok. “Forward Stimulated Brillouin Scattering Analysis of Optical Fibers Coatings”. Journal of Lightwave Technology, 2021. • Arik Bergman, Robert Duggan, Kavita Sharma, Moshe Tur, Avi Zadok, Andrea Alù. “Observation of anti-parity-timesymmetry, phase transitions and exceptional points in an optical fibre”. Nature Communications, 2021. • Hilel Hagai Diamandi, Gil Bashan, Yosef London, Kavita Sharma, Keren Shemer, Avi Zadok. “Interpolarization Forward Stimulated Brillouin Scattering in Standard Single-Mode Fibers”. Laser & Photonics Reviews, 2021. • A. Misra, S. Preussler, D. Munk, M. Katzman, L. Zhou, A. Zadok, and T. Schneider. “Integrated High-Resolution Optical Spectrum Analyzer With Broad Operational Bandwidth”. IEEE Photonics Technology Letters 32, 1061-1064, 2020. • K. Shemer, G. Bashan, H. H. Diamandi, Y. London, T. Raanan, Y. Israelashvili, A. Charny, I. Cohen, A. Bergman, N. Levanon, and A. Zadok. “Sequence-coded coherent laser ranging with high detection sensitivity”. OSA Continuum 3, 1274-1282, 2020. • G. Bashan, Y. London, H. H. Diamandi and A. Zadok. “Distributed cladding mode fiber-optic sensor”. Optica 7, 85-92, 2020. • H. H. Diamandi, Y. London, A. Bergman, G. Bashan, J. Madrigal, D. Barrera, S. Sales, and A. Zadok. “Opto-mechanical interactions in multi-core optical fibers and their applications.” invited paper. IEEE J. Selected Topics in Quantum Electronics 26, 2600113, 2020.

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