Article
Physics, Multidisciplinary
Thomas Allcock, Wolfgang Langbein, Egor A. Muljarov
Summary: In this study, we propose an exact analytical approach to investigate the optical response of a two-level system coupled to a microcavity. By increasing the pulse area of the excitation field, we are able to form a quantum Mollow quadruplet, which quantizes the semiclassical Mollow triplet.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
Miaodi Guo, Haifeng Li, Ning Li, Yajie Wu
Summary: We propose a scheme for tunable coherent perfect absorption (CPA) and near-perfect reflection (near CPR) in a three-level A-type atom-cavity system. By utilizing electromagnetically-induced-transparency-type interference induced by a coherent coupling laser, tunable near CPR at two-photon resonance can be achieved. Additionally, we demonstrate that CPA can be switched to the near-CPR regime by adjusting the linear absorption or gain using an incoherent pump field. This research provides a theoretical mechanism for manipulation of perfect absorption and reflection, with potential applications in coherent optical computing and communication.
Article
Optics
Amit Dey
Summary: This paper examines the nonlinear stimulated Raman adiabatic passage (STIRAP) in a quantum many-body framework, showcasing how an out-of-time-ordered correlator (OTOC) measure accurately captures chaotic and nonchaotic features of the system and matches classical chaos quantified by Lyapunov exponent analysis.
Article
Materials Science, Multidisciplinary
Y. Zhou, S. Y. Xie, C. J. Zhu, Y. P. Yang
Summary: This paper presents a proposal to produce bipartite and tripartite entanglement in a hybrid magnon cavity QED system. It shows that nonlinear pumping can result in strong bipartite entanglement between the cavity photon and magnon, as well as bipartite and tripartite entanglement among magnon modes, under certain conditions.
Article
Chemistry, Physical
Sonam Rani, Manushree Tanwar, Chanchal Rani, Ravi Bhatia, Rajesh Kumar, I. Sameera
Summary: Raman spectroscopy was used to investigate the structure and vibrational properties of MoS2 nanoflowers. The study observed a softening of the E-2g(1) and A(1g) modes with increasing temperature, and found a linear relationship between these modes and temperature. Using a semiquantitative model, the study quantified the contributions of true anharmonicity and quasi-harmonicity to the temperature-dependent Raman shifts. It was observed that true anharmonicity had a greater influence, while the thermal expansion coefficient played a major role in the quasi-harmonic contribution. The study also demonstrated the variation in quasi-harmonicity behavior with temperature.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Optics
Mikhail Tokman, Maria Erukhimova, Qianfan Chen, Alexey Belyanin
Summary: Many nanocavity-QED systems demonstrate strong nonlinear interactions between electrons, photons, and phonon modes, and we have described these systems using a universal model near the nonlinear resonance. We have solved the nonperturbative quantum dynamics in the strong-coupling regime and found analytic solutions that show tripartite quantum entanglement.
Article
Chemistry, Physical
Riya Dutta, Saloni Kakkar, Praloy Mondal, Neha Chauhan, J. K. Basu
Summary: The optical properties of hybrid semiconductor quantum dots (QD) and single-layer graphene (SLG) devices are controlled by the interplay of energy transfer and charge transfer between the QDs and SLG, and can be tuned by electrostatic doping and adjusting the distance between QDs.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Tomonao Inoue, Jun-ya Kohno
Summary: In this study, a new optical cavity method is developed to extend the applicability of SRS measurement to liquids with low viscosity or low interfacial tension. By observing the low-frequency modes of liquid benzene, the study reveals that SRS occurs locally with respect to the droplet size. This method is of great significance for the study of liquid structures based on vibrational spectroscopy.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Review
Chemistry, Physical
Mohamad Toutounji
Summary: This review combines electronic optical response function theory with the mixed quantum-classical (MQC) Liouville equation (MQCLE) to investigate electronic spectroscopy in MQC media. The study demonstrates the utility and efficiency of the mixed quantum-classical dynamics (MQCD) formalism in probing condensed systems, where quantum mechanics and classical mechanics are combined. The author applies the MQCD framework to analyze electronic dephasing, electron-phonon coupling, and the shape and symmetry of spectral profiles, providing novel insights and accurate results. Rating: 9/10
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
(2023)
Article
Optics
M. Eslami, G. -L. Oppo
Summary: Numerical simulation demonstrates the existence of different dynamical behaviors of cavity solitons in a cavity filled with triple quantum dot molecules, including stationary, oscillating, and stationary-rambling states. Additionally, three different types of dissipative localized structures can be excited in regions with high material coherence due to strong light-matter interaction processes.
EUROPEAN PHYSICAL JOURNAL D
(2021)
Article
Nanoscience & Nanotechnology
Vijay Bhatt, Surabhi Yadav, Pradip K. Jha, Aranya B. Bhattacherjee
Summary: In this work, we theoretically analyze optical bistability and absorption in a coupled double quantum dot cavity system in the presence of a third-order Kerr nonlinear chi((3)) medium. We find that the optical bistability can be tuned by adjusting the coupling strength between the two quantum dots, the strength of the nonlinear medium, and other system parameters. We also investigate the possibility of using the system as an efficient optical switch. Furthermore, we demonstrate that the system parameters can also tune the absorption spectrum, exhibiting both positive and negative absorption (emission).
PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS
(2022)
Article
Chemistry, Physical
Jakub Slawski, Rafal Bialek, Gotard Burdzinski, Krzysztof Gibasiewicz, Remigiusz Worch, Joanna Grzyb
Summary: Our study found that different forms of CytC can quench the fluorescence of QDs, with significant differences in effectiveness depending on QD size. SnCytC and porphyrin CytC increased the rate of Fe(III)CytC photoreduction, while Fe(II)CytC slightly decreased the rate and the presence of ZnCytC significantly decreased the rate and final level of reduced FeCytC. The net preference for photoinduced ET over other ways of energy transfer may be partially due to a lack of donors and irreversible ET events.
JOURNAL OF PHYSICAL CHEMISTRY B
(2021)
Article
Engineering, Electrical & Electronic
Tanja Finke, Vitalii Sichkovskyi, Johann Peter Reithmaier
Summary: In this study, an optically pumped vertical external-cavity surface-emitting laser based on quantum dots with high optical gain was demonstrated. By optimizing the photoluminescence emission of the quantum dots and reducing non-radiative recombination centers, high output power efficiency was achieved. Analysis was also conducted on the number of quantum dot layers, the heat sink temperature, and the heat spreader material to improve the performance of the laser.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2021)
Article
Optics
M. O. Musa, H. Temimi, Y. Zhu
Summary: This study presents detailed numerical simulations of the semiclassical and quantum spectra of a cavity QED system consisting of a single three-level atom interacting with a quantized cavity mode. The results show that the semiclassical and quantum approaches yield identical results under weak driving field conditions, but yield different spectra under strong driving field intensities, revealing multiphoton and bistable spectrum effects.
JOURNAL OF MODERN OPTICS
(2022)
Article
Chemistry, Applied
Yu P. Piryatinski, A. B. Verbitsky, A. Dmytruk, M. B. Malynovskyi, P. M. Lutsyk, A. G. Rozhin, O. D. Kachkovsky, Ya O. Prostota, V. V. Kurdyukov
Summary: This study investigated the nature and pathways of electronic excitation relaxation in a cationic pentamethine pyrylocyanine dye at low temperature. Through quantum-chemical calculations and time-resolved spectral measurements, the symmetric and non-symmetric structures in the ground and excited states were characterized, along with proposed energy diagram model for relaxation pathways. The study found that the transition between polymethine and polyene structures significantly impacts the electronic properties of the dye.
Article
Optics
Josephine Nauschuetz, Hedwig Knoetig, Robert Weih, Julian Scheuermann, Johannes Koeth, Sven Hoefling, Benedikt Schwarz
Summary: This article presents GaSb-based interband cascade lasers (ICLs) operating at a center wavelength of 6.12 μm in continuous-wave mode up to a maximum temperature of 40 °C. The performance of the devices is improved by adjusting the Ga1-xInxSb layer thickness in the active region to reduce valence intersubband absorption. The optimization of the device design and electron injector rebalances the electron and hole concentrations, resulting in low threshold current densities and power consumption, making them suitable for mobile and compact sensing systems.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Jonathan Jurkat, Sebastian Klembt, Marco De Gregorio, Moritz Meinecke, Quirin Buchinger, Tristan H. Harder, Johannes Beierlein, Oleg A. Egorov, Monika Emmerling, Constantin Krause, Christian Schneider, Tobias Huber-Loyola, Sven Hoefling
Summary: The introduction of topological physics to photonics has resulted in the development of robust photonic devices. While classical topological protection of light has been achieved, the utilization of quantum light sources in devices with topologically nontrivial resonances remains largely unexplored.
Article
Optics
Moritz Pfluger, Daniel Brunner, Tobias Heuser, James A. Lott, Stephan Reitzenstein, Ingo Fischer
Summary: In this article, we demonstrate the construction of the largest network of optically coupled semiconductor lasers reported so far by using diffractive optics in an external cavity to couple vertical-cavity surface-emitting lasers (VCSELs). We successfully align and lock 22 out of 25 lasers to an external drive laser, and show significant interaction between the lasers of the array. Our VCSEL network, with its high homogeneity, strong interaction, and scalability, serves as a promising platform for experimental investigations of complex systems and has direct applications as a photonic neural network.
Article
Engineering, Electrical & Electronic
Nikolai B. Chichkov, Amit Yadav, Franck Joulain, Solenn Cozic, Semyon V. Smirnov, Leon Shterengas, Julian Scheuermann, Robert Weih, Johannes Koeth, Sven Hofling, Ulf Hinze, Samuel Poulain, Edik U. Rafailov
Summary: Building upon recent advances in GaSb-based diode lasers and Er-doped fluoride fibre technologies, this article demonstrates the fibre-based amplification of mid infrared diode lasers around 2.78 μm for the first time. The experimental results show output powers up to 0.9 W, pulse durations as short as 20 ns, and pulse repetition rates up to 1 MHz. Additionally, the impact of different fibre end-cap materials on laser performance is analyzed.
IEEE PHOTONICS JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Timm Gao, Martin von Helversen, Carlos Anton-Solanas, Christian Schneider, Tobias Heindel
Summary: Currently, quantum communication relies on attenuated lasers for secret key generation. However, in future quantum networks, deterministic quantum light sources are needed to overcome limitations from probabilistic photon distribution. Transition metal dichalcogenides (TMDCs) show potential as emitters for quantum light generation, and we demonstrate their practicality in quantum communication by using a TMDC single-photon source in a quantum key distribution (QKD) setup. Our results show performance comparable to QKD experiments using semiconductor quantum dots or color centers in diamond, and pave the way for wider applications of quantum information technologies using TMDC single-photon sources.
NPJ 2D MATERIALS AND APPLICATIONS
(2023)
Article
Physics, Applied
Quirin Buchinger, Simon Betzold, Sven Hoefling, Tobias Huber-Loyola
Summary: We conducted an optical study on various device designs of electrically contactable circular Bragg grating cavities in labyrinth geometries. In order to establish an electrical connection between the central disk and the surrounding membrane, we introduced connections between the adjacent rings separated by air gaps. By rotating these connections to create a labyrinth-like structure, we improved mode confinement, far-field pattern, and Purcell factor compared to layouts with connections arranged in straight lines. Reflectivity measurements and simulations were conducted to investigate the effects of different arrangements and sizes of connections on the optical properties and to determine the optimal design.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yago del Valle-Inclan Redondo, Christian Schneider, Sebastian Klembt, Sven Hoefling, Seigo Tarucha, Michael D. Fraser
Summary: We have created a rotating polariton condensate at gigahertz frequencies by off-resonantly pumping with a rotating optical stirrer composed of structured laser modes. The results show that the rotating polariton condensate acquires angular momentum exceeding the critical 1n/particle and demonstrates deterministic nucleation and capture of quantized vortices with a handedness controlled by the pump rotation direction. This study enables new opportunities for exploring open dissipative superfluidity, ordering of non-Hermitian quantized vortex matter, and topological states in a highly nonlinear, photonic platform.
Article
Optics
Lucas Rickert, Fridtjof Betz, Matthias Plock, Sven Burger, Tobias Heindel
Summary: This paper presents a numerical investigation of directly fiber-coupled hybrid circular Bragg gratings (CBGs) featuring electrical control for operation in the application relevant wavelength regimes. The proposed high-performance designs combine hybrid CBGs with a dielectric planarization and a transparent contact material, enabling high direct fiber coupling efficiency and exhibiting Purcell factors. The identified designs can sustain expected fiber efficiencies and average Purcell factors assuming conservative fabrication accuracies, and electrical field strengths suitable for Stark-tuning of an embedded quantum dot can be reached.
Article
Physics, Multidisciplinary
Carolin Lueders, Matthias Pukrop, Franziska Barkhausen, Elena Rozas, Christian Schneider, Sven Hoefling, Jan Sperling, Stefan Schumacher, Marc Assmann
Summary: We have developed a novel phase-space method to dynamically monitor quantum coherence in polariton condensates. Our approach allows us to quantify complex decoherence mechanisms and provides a stable system for long-term coherence. By reconstructing phase-space functions from homodyne detection data, we have demonstrated the potential of using quantum coherence for information processing up to the nanosecond regime.
PHYSICAL REVIEW LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Daniel Wigger, Johannes Schall, Marielle Deconinck, Nikolai Bart, Pawel Mrowinski, Mateusz Krzykowski, Krzysztof Gawarecki, Martin von Helversen, Ronny Schmidt, Lucas Bremer, Frederik Bopp, Dirk Reuter, Andreas D. Wieck, Sven Rodt, Julien Renard, Gilles Nogues, Arne Ludwig, Pawel Machnikowski, Jonathan J. Finley, Stephan Reitzenstein, Jacek Kasprzak
Summary: Semiconductor quantum dot molecules are versatile in their tunability of optical properties and their ability to cover different energy scales associated with charge and spin physics, making them promising for quantum technological applications. This study demonstrates the coherent control of interdot tunnel-coupling in these systems, focusing on the quantum coherence of optically active trion transitions. By using ultrafast four-wave mixing spectroscopy, a quantum coherence is generated in one trion complex and transferred and probed in another trion configuration, with theoretical modeling providing an explanation of the underlying coupling mechanism and dynamic processes.
Article
Physics, Applied
Chirag Chandrakant Palekar, Manan Shah, Stephan Reitzenstein, Arash Rahimi-Iman
Summary: This study reports the design, nanofabrication, and characterization of high-quality polymer-based micromirror structures using the 3D two-photon polymerization lithography technique. The innovative concept provides microstructures for fast prototyping and offers cost-effective and environmentally sensitive polymer-based mirrors compatible with a wide range of wavelengths. The research demonstrates reproducible and mechanically stable 3D printed micromirrors that enable hybrid nanophotonic devices based on quantum dots, molecules, or 2D quantum materials.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Michael Seidel, Yuhui Yang, Thorsten Schumacher, Yongheng Huo, Saimon Filipe Covre da Silva, Sven Rodt, Armando Rastelli, Stephan Reitzenstein, Markus Lippitz
Summary: Reliable single-photon sources, high coupling efficiency, and low propagation losses are key requirements for quantum plasmonic nanocircuits. The best overall performance of these nanocircuits is achieved by adding a spacer layer between the quantum dot and the plasmonic waveguide, resulting in an improved coupling efficiency through standing wave interference.
Article
Optics
Zaijun Chen, Alexander Sludds, Ronald Davis III, Ian Christen, Liane Bernstein, Lamia Ateshian, Tobias Heuser, Niels Heermeier, James A. Lott, Stephan Reitzenstein, Ryan Hamerly, Dirk Englund
Summary: Researchers demonstrate an optical computing architecture using micrometre-scale VCSEL transmitter arrays, achieving an energy efficiency of 7 fJ per operation and a compute density of 6 tera-operations mm(-2) s(-1). This system overcomes the challenges of ONNs, such as high energy consumption, low compute density, and long latency, providing a new way to accelerate machine learning tasks.
Article
Physics, Multidisciplinary
Yanqiang Guo, Jianfei Zhang, Xiaomin Guo, Stephan Reitzenstein, Liantuan Xiao
Summary: The emission characteristics of quantum-dot micropillar lasers (QDMLs) lie at the intersection of nanophotonics and nonlinear dynamics, providing an ideal platform for studying the optical interface between classical and quantum systems. In this research, a noise-induced bimodal QDML with orthogonal dual-mode outputs is modeled, and the nonlinear dynamics, stochastic mode jumping, and quantum statistics are investigated. The results show that noise-induced effects lead to the emergence of two intensity bifurcation points for the strong and weak modes, and the maximum output power of the strong mode increases with the noise intensity. The anti-correlation of the two modes reaches its maximum at the second intensity bifurcation point. The dual-mode stochastic jumping frequency and effective bandwidth can exceed 100 GHz and 30 GHz under the noise-induced effect. Photon bunching (g((2))(0) > 1) of both modes is observed over a wide range of noise intensities and injection currents. The photon number distribution of the strong or weak mode becomes a mixture of Bose-Einstein and Poisson distributions, with the proportion of the Poisson distribution increasing in the high injection current region for the strong mode and decreasing for the weak mode.
NEW JOURNAL OF PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Maciej Jaworski, Aleksandra Chudzynska, Pawel Mrowinski, Joanna Prazmowska-Czajka, Wojciech Kijaszek, Jan Grosse, Sven Rodt, Stephan Reitzenstein, Grzegorz Sek
Summary: This study proposes the xenon-plasma FIB technology as an alternative solution for the fabrication of photonic microstructures. By optimizing the processing method, GaAs-based photonic microstructures with InGaAs QDs emitting bright light were successfully fabricated.
OPTICAL MATERIALS EXPRESS
(2023)
