Ohad Segal

Assuta Medical Center

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Mordechai Segev

Technion – Israel Institute of Technology

Yonatan Plotnik

Technion – Israel Institute of Technology

Eran Lustig

Stanford University

Alexandra Boltasseva

Purdue University West Lafayette

Mark Lyubarov

Technion – Israel Institute of Technology

Soham Saha

Purdue University West Lafayette

Vladimir M. Shalaev

Purdue University West Lafayette

Moshe-Ishay Cohen

Technion – Israel Institute of Technology

Yonatan Sharabi

Technion – Israel Institute of Technology

Avner Shultzman

Technion – Israel Institute of Technology

Cooperative Institutions

Technion – Israel Institute of Technology

Tel Aviv University

Assuta Medical Center

Ben-Gurion University of the Negev

Purdue University West Lafayette

State Street (United States)

Weizmann Institute of Science

Purdue University System

Military University of Technology in Warsaw

Institute of Physics

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[NOVEL CONCEPTS AND CHANGES IN TOTAL JOINT ARTHROPLASTY IN THE 21ST CENTURY].

PubMed (2022)

Yaniv Nur Ran Atzmon Tal Kalimian Ohad Segal Amir Herman

Total joint arthroplasty (TJA) is amongst the most common elective orthopedic surgeries. Since their introduction in 1951 there have been changes not only in prosthesis design and surgical approaches, but also in patient management, anesthesia, drug regimen and robotic arm assistance. These changes led to advancement in patient safety and shorter hospitalization. Today TJA is accessible for a wider age and function range of patients, which has led to an exponential growth in the number of procedures conducted.

Joint arthroplasty

Regimen

Total joint replacement

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Topological Protection of Bell States in a Two-Dimensional Quantum Walk

Liat Nemirovsky-Levy Mark Lyubarov Yonatan Plotnik Ohad Segal Mordechai Segev

We present a method to protect the entanglement of a Bell-state encoded on a single photon performing a two-dimensional discrete-time quantum walk. We find an edge-state at the boundary of two distinct quantum walk domains.

Quantum walk

10.1364/cleo_fs.2024.fw3m.4

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Time-Refraction Optics at Single Cycle Modulation

Eran Lustig Ohad Segal Soham Saha Eliyahu Bordo Sarah N. Chowdhury

We present an experimental study of optical time-refraction in single-cycle time-interfaces. Specifically, we study the propagation of a probe pulse through a sample undergoing large refractive index changes induced by an intense ultra-short modulator pulse.

Modulation (music)

10.1364/cleo_fs.2023.ftu3d.1

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Photonic time crystals: A materials perspective

Vladimir M. Shalaev Soham Saha Ohad Segal Colton Fruhling Eran Lustig

Recent advances in ultrafast, large-modulation photonic materials have opened the door to many new areas of research. One specific example is the exciting prospect of photonic time crystals. In this perspective, we outline the most recent material advances that are promising candidates for photonic time crystals. We discuss their merit in terms of modulation speed and depth. We also investigate the challenges yet to be faced and provide our estimation on possible roads to success.

Figure of Merit

Modulation (music)

10.1364/opticaopen.21916053.v1

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Second Harmonic Generation in Photonic Time Crystals

Noa Konforty Moshe-Ishay Cohen Ohad Segal Yonatan Plotnik Mordechai Segev

We study the process of second harmonic generation in photonic time-crystals. We find the phase matching condition of the process and show it can be tailored by the photonic time-crystal band structure.

Harmonic Analysis

10.1364/cleo_fs.2024.fth1l.1

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Photonic Space-Time Topological Edge States

Ohad Segal Yonatan Plotnik Eran Lustig Moshe-Ishay Cohen Alex Dikopoltsev

We introduce topological edge states in photonic space-time crystals. We show that photonic space-time crystals support propagating edge states and find a unique edge state that grows exponentially in energy whilst following the spatio-temporal edge.

10.1364/cleo_fs.2023.ftu4d.1

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Continuous variables cluster states in Photonic Time-Crystals

Mordechai Segev Mark Lyubarov Ohad Segal Michael Birk Alexey Gorlach

Photonic quantum computing has been rapidly advancing over the past decade, with measurement-based approaches emerging as particularly promising. A crucial requirement for these approaches is the generation of large-scale cluster states. In this work, we present a method to create cluster states using Photonic Time-Crystals (PTCs) — dielectric materials with their refractive index rapidly modulated in time. PTCs effectively function as a set of optical parametric oscillators and beam-splitters, producing simultaneous two-mode squeezing for many pairs of photonic modes with opposite wavevectors. We utilize this capability to propose a method for generating two-dimensional cluster states, offering important advantages over existing protocols.

10.1364/opticaopen.28284683

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Topology in Photonic Space-Time Crystals

Conference on Lasers and Electro-Optics (2022)

Ohad Segal Eran Lustig Yonatan Sharabi Moshe-Ishay Cohen Ron Ziv

We introduce topological phases in photonic space-time crystals, which have gaps in both momentum and frequency. We show that edge states waves refracted and reflected from spatial and temporal interfaces are governed by topological invariants.

10.1364/cleo_at.2022.jw4a.4

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Photonic time crystals: A materials perspective

Vladimir M. Shalaev Soham Saha Ohad Segal Colton Fruhling Eran Lustig

Figure of Merit

Modulation (music)

10.1364/opticaopen.21916053.v2

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Second Harmonic Generation and Nonlinear Frequency Conversion in Photonic Time-Crystals

arXiv (Cornell University) (2024)

Noa Konforty Moshe-Ishay Cohen Ohad Segal Yonatan Plotnik Mordechai Segev

We study the nonlinear process of second harmonic generation in photonic time-crystals, materials with refractive index that varies abruptly and periodically in time, and obtain the phase matching condition for this process. We find conditions for which the second harmonic generation is highly enhanced even in the absence of phase matching, governed by the exponential growth of the modes residing in the momentum gap of the photonic time crystal. Additionally, under these conditions, a cascade of higher order harmonics is generated at growing exponential rates. The process is robust, with no requirement for phase-matching, the presence of a resonance or a threshold, drawing energy from the modulation.

Frequency Conversion

Harmonic

10.48550/arxiv.2411.11052

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