Article
Optics
Rahul Dev Mishra, Lalit Singh, Swati Rajput, Vishal Kaushik, Sulabh Srivastava, Mukesh Kumar
Summary: The silicon-based engineered hybrid plasmonic waveguide proposed in the study offers ultra-low dispersion and electrically tunable characteristics, making it suitable for intense nonlinear signal processing and other nanoscale integrated photonic devices.
Article
Physics, Multidisciplinary
Xinchao Zhou, Hikaru Tamura, Tzu-Han Chang, Chen-Lung Hung
Summary: We demonstrate an efficient optical guiding technique for coupling cold atoms in the near field of a planar nanophotonic circuit, and realize large atom-photon coupling to a whispering-gallery mode in a microring resonator with a single-atom cooperativity C > 8. The guiding potential is created by diffracted light on a nanophotonic waveguide that smoothly connects to a dipole trap in the far field for atom guiding with subwavelength precision. We observe atom-induced transparency for light coupled to a microring, characterize the atom-photon coupling rate, extract guided atom flux, and demonstrate on-chip photon routing by single atoms. Our demonstration promises new applications with cold atoms on a nanophotonic circuit for chiral quantum optics and quantum technologies.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Physical
Charles Babin, Rainer Stoehr, Naoya Morioka, Tobias Linkewitz, Timo Steidl, Raphael Woernle, Di Liu, Erik Hesselmeier, Vadim Vorobyov, Andrej Denisenko, Mario Hentschel, Christian Gobert, Patrick Berwian, Georgy Astakhov, Wolfgang Knolle, Sridhar Majety, Pranta Saha, Marina Radulaski, Nguyen Tien Son, Jawad Ul-Hassan, Florian Kaiser, Joerg Wrachtrup
Summary: Optically addressable spin defects in silicon carbide (SiC) are a promising platform for quantum information processing, enabling high-fidelity spin qubit operations. However, degradation of spin-optical coherence after integration in nanophotonic structures poses a challenge for scalability towards large-scale quantum networks.
Article
Engineering, Electrical & Electronic
Vijay S. Palaparthy, Sandeep G. Surya, Ashwini S. Gajarushi, Saurabh Arun Chandorkar, Tapanendu Kundu, Maryam Shojaei Baghini, V. Ramgopal Rao
Summary: A novel dual readout MEMS cantilever with high optical and resistive sensitivities has been developed, integrating a 2D PhC waveguide and piezoresistor element. Excellent piezoresistive and optical sensitivities were achieved, allowing for two distinct signatures for the same target analyte. The unique design of the miniaturized MEMS cantilever makes it vital for high detection accuracy applications.
IEEE SENSORS JOURNAL
(2021)
Article
Optics
Xin Wang, Zhao -Min Gao, Jia-Qi Li, Huai -Bing Zhu, Hong-Rong Li
Summary: We propose a quantum electrodynamics platform in which quantum emitters interact with a Hofstadter-ladder waveguide. We demonstrate several intriguing phenomena, including chiral spontaneous emission, periodically modulated dynamics of emitters of the giant atom form, and the dipole-dipole interaction between two giant emitters mediated by bound states.
Article
Materials Science, Multidisciplinary
Jinkyung Kim, Won-jun Jang, Thi Hong Bui, Deung-Jang Choi, Christoph Wolf, Fernando Delgado, Yi Chen, Denis Krylov, Soonhyeong Lee, Sangwon Yoon, Christopher P. Lutz, Andreas J. Heinrich, Yujeong Bae
Summary: The study found that using titanium atoms as sensors can detect magnetic environments, and ESR-STM technology can accurately determine the spin states of individual atoms.
Article
Physics, Applied
Joshua A. Robinson, Bruno Schuler
Summary: Semiconducting 2D transition metal dichalcogenides are essential in scaling microelectronics to atomic level, with quantum properties enabling new device concepts. Key goals include addressing lattice imperfections and generating desirable defects in a deterministic manner. Researchers reviewed recent results on atomic point defects and discussed the future frontiers in this rapidly evolving field.
APPLIED PHYSICS LETTERS
(2021)
Article
Multidisciplinary Sciences
Lukas M. Veldman, Laetitia Farinacci, Rasa Rejali, Rik Broekhoven, Jeremie Gobeil, David Coffey, Markus Ternes, Alexander F. Otte
Summary: A new method for studying the evolution of spin-coupled systems using scanning tunneling microscopy. By utilizing a direct-current pump-probe scheme and magnetic interaction to adjust the relative precession of spins, the mechanism of spin entanglement leading to angular momentum exchange is revealed.
Article
Engineering, Electrical & Electronic
Xin Tong, Hao Tian, Yongjun Guo, Meng Zhang, Lin Zhang
Summary: The study introduces a method of integrating nanophotonic traps in a microfluidic channel, utilizing a slot waveguide and nano-slit to generate strong optical forces for trapping nanoparticles, forming a large array of optical traps expected for application in biological nanoparticle research.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Optics
Rivka Gherabli, S. R. K. C. Indukuri, Roy Zektzer, Christian Frydendahl, Uriel Levy
Summary: We successfully demonstrate a chip-scale integrated photodetector for the near-infrared spectral regime, based on a MoSe2/WS2 heterojunction integrated on a silicon nitride waveguide. The device achieves high responsivity and low dark current, making it useful for characterizing the transfer function of a microring resonator on the same chip. The integration of local photodetectors with high performance in the near-infrared regime is expected to be crucial for future integrated devices in various fields.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Optics
A. Maslov
Summary: This study investigates a resonant scatterer system consisting of a two-level atom coupled to a circular dielectric waveguide. The results show that a scatterer with fixed dipole orientation produces Lorentzian line-shaped scattering spectra, while an isotropic scatterer can produce non-Lorentzian line-shaped spectra. It was also found that the propelling force and axial torque on the scatterer can be directly expressed in terms of the spontaneous emission coupling factor of the system. The study also discusses the balance of linear and angular momentum in the system.
Review
Chemistry, Analytical
Sebastian Alberti, Anurup Datta, Jana Jagerska
Summary: In recent years, on-chip devices for absorption spectroscopy and Raman spectroscopy have experienced rapid development due to the widespread availability of compact and affordable tunable lasers, detectors, and on-chip spectrometers. Material processing compatible with mass production has enabled the production of long low-loss waveguides of sophisticated designs to enhance high-light-analyte interactions, while sensitivity and selectivity have been further improved through the development of sorbent cladding. Studies on waveguide-enhanced Raman spectroscopy (WERS) and waveguide infrared absorption spectroscopy (WIRAS) have focused on advancements in integrated light sources and detectors for miniaturization, recent developments in waveguides and cladding to enhance sensitivity, and gas-sensing applications and main configurations, as well as summarizing relevant figures of merit and limitations of different sensor implementations.
Article
Optics
Xian-Li Yin, Yu-Hong Liu, Jin-Feng Huang, Jie-Qiao Liao
Summary: This paper investigates the coherent single-photon scattering in a one-dimensional waveguide coupled to a giant artificial molecule consisting of two coupled giant atoms. Exact expressions for the transmission and reflection amplitudes are obtained using the real-space approach. The scattering spectra behavior is found to depend on the phase shift, coupling configuration, and coupling strength between the giant atoms. The results of this study are important for the development of controllable single-photon devices based on giant-molecule waveguide-QED systems.
Article
Optics
Eva M. Gonzalez-Ruiz, Freja T. Ostfeldt, Ravitej Uppu, Peter Lodahl, Anders S. Sorensen
Summary: We analyzed the entanglement properties of deterministic path-entangled photonic states generated by coupling the emission of a quantum-dot biexciton cascade to a chiral nanophotonic waveguide. Our analysis considered realistic experimental imperfections, such as imperfect chiral emitter-photon interactions and asymmetric coupling of exciton levels due to fine-structure splitting, along with time jitter in photon detection. The results showed that this approach offers a promising platform for generating entanglement in integrated nanophotonic systems despite the presence of these imperfections.
Article
Optics
Lei Wang, Xiuquan Zhang, Feng Chen
Summary: A new scheme is proposed in this study to achieve efficient second harmonic generation (SHG) via a nanophotonic LiNbO3 thin-film waveguide with a conversion efficiency of 5540% W-1 cm(-2). The design of a dual-layer ridge waveguide has advanced the understanding of modal phase-matched SHG and other quadratic optical nonlinear processes.
LASER & PHOTONICS REVIEWS
(2021)
Article
Physics, Multidisciplinary
Riccardo Pennetta, Martin Blaha, Aisling Johnson, Daniel Lechner, Philipp Schneeweiss, Juergen Volz, Arno Rauschenbeutel
Summary: This article experimentally and theoretically investigates collective radiative effects in an ensemble of cold atoms coupled to a single-mode optical nanofiber. The results reveal the microscopic dynamics of the system and the progressive growth of collective interactions between atoms and a guided photon. The experimental measurements demonstrate superradiant decays in the forward-propagating guided mode and the progressive growth of the collective response of the atomic ensemble.
PHYSICAL REVIEW LETTERS
(2022)
News Item
Optics
Arno Rauschenbeutel, Philipp Schneeweiss
Summary: The researchers demonstrate voltage-controlled routing of photons in an integrated nanophotonic device by electrically controlling the polarization of optically created waveguide-coupled excitons in a two-dimensional semiconductor.
Article
Optics
Sebastian Pucher, Christian Liedl, Shuwei Jin, Arno Rauschenbeutel, Philipp Schneeweiss
Summary: Researchers demonstrate non-reciprocal amplification of nanofibre-guided light using Raman gain provided by nearby spin-polarized atoms. The direction of amplification can be controlled via the atomic spin state.
Article
Physics, Multidisciplinary
Riccardo Pennetta, Daniel Lechner, Martin Blaha, Arno Rauschenbeutel, Philipp Schneeweiss, Juergen Volz
Summary: We discuss the evolution of the quantum state of an ensemble of atoms coupled via a single propagating optical mode. Theoretical predictions show that the quantum state of atoms prepared in timed Dicke state will evolve through subradiant states with respect to the propagating mode. Experimental observations support these findings, showing temporary switch-offs of optical power emitted into the nanofiber.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
Philipp Schneeweiss, Christian Liedl, Sebastian Pucher, Leonid P. Yatsenko, Arno Rauschenbeutel
Summary: We investigate two-photon Rabi oscillations in quantum emitters with a Λ-type level structure and observe the associated oscillatory Raman gain and absorption. The efficient and homogeneous coupling between atoms and the probe field is achieved through a nanofiber-based optical interface.
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
(2022)
Article
Physics, Multidisciplinary
Christian Liedl, Sebastian Pucher, Felix Tebbenjohanns, Philipp Schneeweiss, Arno Rauschenbeutel
Summary: This study investigates the interaction of light and matter in ensembles of up to 1000 atoms, from weak excitation to inversion, using the evanescent field surrounding an optical nanofiber. The results contribute to the understanding of collective light-matter interactions and have implications for applications such as quantum memories, non-classical light sources, and optical frequency standards.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
Kasper J. Kusmierek, Sahand Mahmoodian, Martin Cordier, Jakob Hinney, Arno Rauschenbeutel, Max Schemmer, Philipp Schneeweiss, Juergen Volz, Klemens Hammerer
Summary: Waveguide QED with cold atoms is a powerful tool for studying non-equilibrium, many-body, and open-system quantum dynamics. In recent experiments, even with weak coupling and strong photon loss, the collective enhancement of light-atom interactions has led to strong correlations of transmitted photons. In this study, an improved mean-field theory based on higher-order cumulant expansions is applied to describe the theoretically elusive regime of weak coupling and strong driving of large ensembles, yielding insights into the role of many-body and long-range correlations.
SCIPOST PHYSICS CORE
(2023)
Article
Optics
Konstantin Y. Bliokh, Ebrahim Karimi, Miles J. Padgett, Miguel A. Alonso, Mark R. Dennis, Angela Dudley, Andrew Forbes, Sina Zahedpour, Scott W. Hancock, Howard M. Milchberg, Stefan Rotter, Franco Nori, Sahin K. Ozdemir, Nicholas Bender, Hui Cao, Paul B. Corkum, Carlos Hernandez-Garcia, Haoran Ren, Yuri Kivshar, Mario G. Silveirinha, Nader Engheta, Arno Rauschenbeutel, Philipp Schneeweiss, Juergen Volz, Daniel Leykam, Daria A. Smirnova, Kexiu Rong, Bo Wang, Erez Hasman, Michela F. Picardi, Anatoly Zayats, Francisco J. Rodriguez-Fortuno, Chenwen Yang, Jie Ren, Alexander B. Khanikaev, Andrea Alu, Etienne Brasselet, Michael Shats, Jo Verbeeck, Peter Schattschneider, Dusan Sarenac, David G. Cory, Dmitry A. Pushin, Michael Birk, Alexey Gorlach, Ido Kaminer, Filippo Cardano, Lorenzo Marrucci, Mario Krenn, Florian Marquardt
Summary: Structured waves are found in all areas of wave physics, both classical and quantum, where the wavefields are inhomogeneous and cannot be approximated by a single plane wave. These complex wavefields with inhomogeneities are crucial in various fields such as nanooptics, photonics, quantum matter waves, acoustics, water waves, etc. This Roadmap surveys the role of structured waves in wave physics, providing background, current research, and anticipating future developments.