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Yu, D. (author), Arora, S. (author), Kuipers, L. (author)We investigate how altering the interface geometry from a zigzag to a glide plane interface between two topologically distinct valley Hall emulating photonic crystals (VPC), profoundly affects edge states. We experimentally observe a transition from gapless to gapped edge states, accompanied by the occurrence of slow light within the...journal article 2024
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Arora, S. (author)The aimof this thesis is to investigate the impact of symmetry on light and how it alters its characteristics. Our research centers around the examination of complex photonic crystals rooted in the concept of photonic topological insulators, which are analogs of topological insulators initially introduced in condensed matter physics. Unlike...doctoral thesis 2023
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Tuchen, Stefan (author), Nazemi, Mohsen (author), Ghelfi-Waechter, Signe Maria (author), Kim, E.Y. (author), Hofer, Franziska (author), Chen, Ching Fu (author), Arora, Mohit (author), Santema, S.C. (author), Blessing, Lucienne (author)The aviation industry is one of the sectors that has been heavily impacted by the pandemic. While the major body of literature has focused on passenger experience and behaviour, this study focuses on airport employees instead—their experiences, perceptions, and preferences following the emergence of COVID-19. More than 1000 participants from...journal article 2023
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Hopster, Jeroen (author), Arora, Chirag (author), Blunden, Charlie (author), Eriksen, Cecilie (author), Frank, Lily (author), hermann, Julia (author), Klenk, M.B.O.T. (author), Steinert, S. (author)The power of technology to transform religions, science, and political institutions has often been presented as nothing short of revolutionary. Does technology have a similarly transformative influence on societies’ morality? Scholars have not rigorously investigated the role of technology in moral revolutions, even though existing research on...journal article 2022
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Arora, S. (author), Bauer, T.A. (author), Parappurath, N. (author), Barczyk, R.T. (author), Verhagen, E. (author), Kuipers, L. (author)We measure the local near-field spin in topological edge state waveguides that emulate the quantum spin Hall effect. We reveal a highly structured spin density distribution that is not linked to a unique pseudospin value. From experimental near-field real-space maps and numerical calculations, we confirm that this local structure is essential...journal article 2022
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Klenk, M.B.O.T. (author), O’Neill, Elizabeth (author), Arora, Chirag (author), Blunden, Charlie (author), Eriksen, Cecilie (author), Hopster, Jeroen (author), Frank, Lily (author)In the last few decades, several philosophers have written on the topic of moral revolutions, distinguishing them from other kinds of society-level moral change. This article surveys recent accounts of moral revolutions in moral philosophy. Different authors use quite different criteria to pick out moral revolutions. Features treated as relevant...journal article 2022
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Barczyk, R.T. (author), Parappurath, N. (author), Arora, S. (author), Bauer, T.A. (author), Kuipers, L. (author), Verhagen, E. (author)We study the signatures of topological light confinement in the leakage radiation of two-dimensional topological photonic crystal cavities that feature the quantum spin Hall effect at telecom wavelengths. The mode profiles in real and momentum space are retrieved using far field imaging and Fourier spectropolarimetry. We examine the scaling...conference paper 2022
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Barczyk, R.T. (author), Parappurath, Nikhil (author), Arora, S. (author), Bauer, T.A. (author), Kuipers, L. (author), Verhagen, Ewold (author)The introduction of topological concepts to the design of photonic crystal cavities holds great promise for applications in integrated photonics due to the prospect of topological protection. This study examines the signatures of topological light confinement in the leakage radiation of 2D topological photonic crystal cavities. The cavities are...journal article 2022
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Arora, Vipul (author), Buhan, Ileana (author), Perin, G. (author), Picek, S. (author)Advances in cryptography have enabled the features of confidentiality, security, and integrity on small embedded devices such as IoT devices. While mathematically strong, the platform on which an algorithm is implemented plays a significant role in the security of the final product. Side-channel attacks exploit the variations in the system’s...conference paper 2022
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Arora, S. (author), Bauer, T.A. (author), Barczyk, René (author), Verhagen, Ewold (author), Kuipers, L. (author)Topological on-chip photonics based on tailored photonic crystals (PhCs) that emulate quantum valley-Hall effects has recently gained widespread interest owing to its promise of robust unidirectional transport of classical and quantum information. We present a direct quantitative evaluation of topological photonic edge eigenstates and their...journal article 2021
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Shiferaw, Yonatan (author), Arora, Apoorva (author), Kuipers, F.A. (author)LoRaWAN has emerged as a popular IoT commu- nications technology. It comes with three classes of operation: A, B, and C. Although many IoT use-cases, like Firmware-over- the-Air updates, require multicast, Class A cannot be used for that purpose. Class C can, but consumes a lot of energy. This leaves Class B. In this paper, we investigate Class...conference paper 2020
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Cheng, Yiwei (author), Arora, Bhavna (author), Şengör, S. Sevinç (author), Druhan, Jennifer L. (author), Wanner, Christoph (author), van Breukelen, B.M. (author), Steefel, Carl I. (author)Microbially mediated sulfate reduction is a ubiquitous process in many subsurface systems. Isotopic fractionation is characteristic of this anaerobic process, since sulfate-reducing bacteria (SRB) favor the reduction of the lighter sulfate isotopologue (S<sup>32</sup>O<sub>4</sub><sup>2−</sup>) over the heavier isotopologue (S<sup>34</sup>O...journal article 2020
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Hsu, C. (author), Frisenda, Riccardo (author), Schmidt, Robert (author), Arora, Ashish (author), de Vasconcellos, Steffen Michaelis (author), Bratschitsch, Rudolf (author), van der Zant, H.S.J. (author), Castellanos-Gomez, Andres (author)An interesting aspect of 2D materials is the change of their electronic structure with the reduction of thickness. Molybdenum and tungsten-based transition metal dichalcogenides form an important family of 2D materials, whose members show a thickness-dependent bandgap and strong light–matter interaction. In this work, the experimental...journal article 2019
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- Arora, N.L. (author) doctoral thesis 1969
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- Arora, N.L. (author) report 1969