Article
Chemistry, Multidisciplinary
Amit R. Dhawan, Michel Nasilowski, Zhiming Wang, Benoit Dubertret, Agnes Maitre
Summary: Single-emitter plasmonic patch antennas are room-temperature deterministic single-photon sources that exhibit highly accelerated and directed single-photon emission. The deterministic room-temperature in situ optical lithography protocol is used to position the plasmonic structure nondestructively on any selected single-emitter with 3D nanoscale control. The presented antenna induces a 1000-fold effective increase in the absorption cross-section and shows nonlinearly enhanced emission under high pumping.
ADVANCED MATERIALS
(2022)
Article
Physics, Multidisciplinary
Zhiyuan Qian, Zhichao Li, He Hao, Lingxiao Shan, Qi Zhang, Jianwen Dong, Qihuang Gong, Ying Gu
Summary: This paper proposes a mechanism of mode coupling led by edge states under topological protection, explaining the phenomenon of absorption reduction in topological photonic structures. By designing topological photonic structures, a significant increase in the rate of nonscattering single photons can be achieved, providing practical applications for on-chip quantum light sources.
PHYSICAL REVIEW LETTERS
(2021)
Article
Quantum Science & Technology
Michael Cosacchi, Tim Seidelmann, Adam Mielnik-Pyszczorski, Miriam Neumann, Thomas K. Bracht, Moritz Cygorek, Alexei Vagov, Doris E. Reiter, Vollrath M. Axt
Summary: This paper proposes a single-photon buffering device composed of a quantum dot doped with a single Mn atom, and achieves the storage and retrieval of photons through optical methods.
ADVANCED QUANTUM TECHNOLOGIES
(2022)
Article
Physics, Multidisciplinary
Friedrich Sbresny, Lukas Hanschke, Eva Schoell, William Rauhaus, Bianca Scaparra, Katarina Boos, Eduardo Zubizarreta Casalengua, Hubert Riedl, Elena del Valle, Jonathan J. Finley, Klaus D. Joens, Kai Mueller
Summary: A scheme for generating highly indistinguishable single photons using semiconductor quantum dots is proposed and demonstrated. The scheme utilizes the resonant two-photon excitation of the biexciton and precise timing of the stimulation pulse to achieve high indistinguishability and low multiphoton errors. Additionally, the polarization of the stimulation pulse allows for deterministic programming of the emitted photon's polarization, resulting in higher brightness compared to cross-polarized resonant excitation.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
Dan Cogan, Zu-En Su, Oded Kenneth, David Gershoni
Summary: Entanglement between particles is crucial for quantum technology, and entanglement between light particles is particularly important for quantum communication. The generation of entangled multiphoton cluster states is essential for communication between quantum nodes. In this study, a multi-indistinguishable photon cluster is generated from a quantum dot with a continuously generated string of photons at deterministic rates and an optimized entanglement length of about ten photons. The indistinguishability of the photons opens up new possibilities for scaling up the cluster's dimensionality by fusion.
Article
Physics, Multidisciplinary
Fan Yang, Mads M. Lund, Thomas Pohl, Peter Lodahl, Klaus Molmer
Summary: Researchers have presented a method to classify quantum fields by using a pair of two-level emitters coupled to a waveguide, which can scatter the single and two-photon components of an input pulse into orthogonal temporal modes. The method achieves a high fidelity and can be used to construct logic elements.
PHYSICAL REVIEW LETTERS
(2022)
Article
Quantum Science & Technology
David Bauch, Dustin Siebert, Klaus D. Joens, Jens Foerstner, Stefan Schumacher
Summary: This study focuses on generating photon pairs with high degrees of polarization entanglement and high indistinguishability. It achieves this by selectively reducing the biexciton lifetime with an optical resonator. Through the optimization of photonic structures and microscopic simulations of quantum-dot cavity excitation dynamics, it determines the optimal range of Purcell enhancement for maximizing indistinguishability and entanglement.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Quantum Science & Technology
Freja T. Ostfeldt, Eva M. Gonzalez-Ruiz, Nils Hauff, Ying Wang, Andreas D. Wieck, Arne Ludwig, Ruediger Schott, Leonardo Midolo, Anders S. Sorensen, Ravitej Uppu, Peter Lodahl
Summary: Research proposes and experimentally realizes an on-demand source of dual-rail photon pairs using a quantum dot in a planar nanophotonic waveguide. The source achieves deterministic generation of spatial dual-rail Bell pairs with the amount of entanglement determined by the chirality. The operational principle can be extended to multiphoton entanglement generation.
Article
Optics
Annika Tebben, Clement Hainaut, Andre Salzinger, Sebastian Geier, Titus Franz, Thomas Pohl, Martin Garttner, Gerhard Zurn, Matthias Weidemuller
Summary: Experimental investigation of the nonlinear transmission spectrum of coherent light fields through a Rydberg EIT medium reveals significant differences on two-photon resonance and exposes deficiencies in mean-field models and rate-equation simulations. A more complete understanding of Rydberg EIT and emerging photon interactions necessitates moving beyond existing simplified models and few-photon theories.
Article
Multidisciplinary Sciences
Christian Schimpf, Marcus Reindl, Daniel Huber, Barbara Lehner, Saimon F. Covre Da Silva, Santanu Manna, Michal Vyvlecka, Philip Walther, Armando Rastelli
Summary: Semiconductor quantum dots exhibit excellent performance in quantum information transfer, achieving ultra-low multi-photon emission probability and high fidelity quantum key distribution. Experimental results indicate that quantum dot light sources can be used for entanglement-based quantum key distribution and quantum networks.
Review
Engineering, Electrical & Electronic
Nicola Biagi, Saverio Francesconi, Alessandro Zavatta, Marco Bellini
Summary: This concise review discusses the progress made in the engineering of quantum light states over the past few decades, highlighting the ability to manipulate light at the level of single photons and produce tailor-made quantum states and operations.
PROGRESS IN QUANTUM ELECTRONICS
(2022)
Article
Chemistry, Physical
Francesco Maddalena, Aozhen Xie, Xin Yu Chin, Raihana Begum, Marcin E. Witkowski, Michal Makowski, Benoit Mahler, Winicjusz Drozdowski, Stuart Victor Springham, Rajdeep Singh Rawat, Nripan Mathews, Christophe Dujardin, Muhammad Danang Birowosuto, Cuong Dang
Summary: This study investigates the potential of lead halide perovskite nanocrystals in X-ray imaging applications, with CsPbBr3 NCs showing the best performance and being particularly suitable for fast-timing applications or particle detectors in high-energy physics.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Optics
Shan Xiao, Shiyao Wu, Xin Xie, Jingnan Yang, Wenqi Wei, Shushu Shi, Feilong Song, Jianchen Dang, Sibai Sun, Longlong Yang, Yunuan Wang, Sai Yan, Zhanchun Zuo, Ting Wang, Jianjun Zhang, Kuijuan Jin, Xiulai Xu
Summary: Chiral quantum optics has attracted interest in the field of quantum information science. By exploiting spin-polarization properties and engineering rational photonic nanostructures, information can be transformed in compact chiral photonic circuits with deterministic circularly polarized chiral routing and beamsplitting.
LASER & PHOTONICS REVIEWS
(2021)
Article
Quantum Science & Technology
Lida Zhang, Valentin Walther, Klaus Molmer, Thomas Pohl
Summary: We investigate the interaction of weak light fields with two-dimensional lattices of atoms with high lying atomic Rydberg states. By analyzing their interplay, we identify conditions that yield a nonlinear quantum mirror which splits incident fields into correlated photon-pairs while transmitting single photons unaffected. Such strong photon-photon interactions in the absence of photon losses open up promising avenues for the generation and manipulation of quantum light, and the exploration of many-body phenomena with interacting photons.
Article
Physics, Multidisciplinary
Nir Nechushtan, Hanzhong Zhang, Mallachi Meller, Avi Pe'er
Summary: The study shows that achieving maximum nonlinear SU(1,1) visibility requires extreme collinear conditions, and near-ideal visibility of approximately 95% can be obtained in an ultra-broadband SU(1,1) interferometer.
NEW JOURNAL OF PHYSICS
(2021)
Article
Optics
Agata Zielinska, Anna Musial, Pawel Wyborski, Mateusz Kuniej, Tobias Heuser, Nicole Srocka, Jan Grosse, Johann Peter Reithmaier, Mohamed Benyoucef, Sven Rodt, Stephan Reitzenstein, Wojciech Rudno-Rudzinski
Summary: In this study, we used the transfer matrix method to measure the temperature dependence of refractive indices of In0.53Al0.1Ga0.37As and Al0.9Ga0.1As semiconductor alloys at telecommunication wavelengths from room temperature to 10 K. We also demonstrated the negligible effect of thermal expansion on the measurement results.
Article
Optics
Aris Koulas-Simos, Georgios Sinatkas, Taiping Zhang, Jia-Lu Xu, William E. Hayenga, Qiang Kan, Ruikang Zhang, Mercedeh Khajavikhan, Cun-Zheng Ning, Stephan Reitzenstein
Summary: We report on the extraction of silver losses in the temperature range of 10 K-180 K using temperature-dependent micro-photoluminescence measurements and numerical simulations on silver-coated nanolasers near infrared telecommunication wavelengths. By mapping changes in the nanolaser's quality factor to silver-loss variations, we extracted the imaginary part of the silver permittivity at cryogenic temperatures and estimated the temperature-dependent values for the thermo-optic coefficient of III-V semiconductors occupying the cavity. These findings are crucial for device modeling and have practical implications for device designing and evaluating thermal effects in silver-coated nanophotonic structures.
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
Physics, Applied
Ching-Wen Shih, Imad Limame, Sebastian Krueger, Chirag C. Palekar, Aris Koulas-Simos, Daniel Brunner, Stephan Reitzenstein
Summary: In this study, optically pumped micropillar lasers with low-absorbing Al0.2Ga0.8As/Al0.9Ga0.1As dielectric Bragg reflectors were designed and characterized. The incorporation of 20% Al content in the DBRs significantly improved the pump efficiency by creating an optical pumping window from 700 to 820 nm. Experimental observations also showed that pump laser wavelengths outside of the specific range resulted in reduced pump efficiency.
APPLIED PHYSICS 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
Optics
Michelle Chalupnik, Anshuman Singh, James Leatham, Marko Loncar, Moe Soltani
Summary: Photonic integrated circuit based optical phased arrays (PIC-OPAs) are a promising technology for programmable processors and spatial light modulators. Implementing them on silicon photonic platforms has been successful. However, creating scalable two-dimensional OPAs that operate with a single wavelength remains a challenge.
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)
Article
Materials Science, Multidisciplinary
Martin von Helversen, Lara Greten, Imad Limame, Ching-Wen Shih, Paul Schlaugat, Carlos Anton-Solanas, Christian Schneider, Barbara Rosa, Andreas Knorr, Stephan Reitzenstein
Summary: This study explores the emission properties of quantum emitters in a WSe2 monolayer induced by metallic nanoparticles, and verifies their single-photon purity. The temperature-dependent coherence time and decay time are determined through Michelson interferometry and time-resolved photoluminescence experiments.
Article
Chemistry, Multidisciplinary
Frederico B. Sousa, Raul Perea-Causin, Sean Hartmann, Lucas Lafeta, Barbara Rosa, Samuel Brem, Chirag Palekar, Stephan Reitzenstein, Achim Hartschuh, Ermin Malic, Leandro M. Malard
Summary: The transition metal dichalcogenide family of semiconducting two-dimensional materials has shown great potential in studying the exciton Mott transition. Pulsed laser excitation at high pump fluences can induce the transition to an electron-hole plasma in these materials, leading to a broadband light emission. Correlation measurements reveal the dynamics of electronic cooling, providing insights for further studies and applications in nanolasers and optoelectronic devices.
Article
Materials Science, Multidisciplinary
Frederik Bopp, Johannes Schall, Nikolai Bart, Florian Voegl, Charlotte Cullip, Friedrich Sbresny, Katarina Boos, Christopher Thalacker, Michelle Lienhart, Sven Rodt, Dirk Reuter, Arne Ludwig, Andreas D. Wieck, Stephan Reitzenstein, Kai Mueller, Jonathan J. Finley
Summary: Quantum dot molecules (QDMs) are capable of generating one-and two-dimensional photonic graph states deterministically. In this study, power-dependent Rabi oscillations of direct excitons, spatially indirect excitons, and excitons with a hybridized electron wave function are demonstrated. An off-resonant detection technique based on phonon-mediated state transfer allows for spectrally filtered detection under resonant excitation. The application of a gate voltage to the QDM device enables continuous transition between direct and indirect excitons, providing control over the overlap of the electron and hole wave function and optimization of graph state generation.
Review
Nanoscience & Nanotechnology
Ying Yu, Shunfa Liu, Chang-Min Lee, Peter Michler, Stephan Reitzenstein, Kartik Srinivasan, Edo Waks, Jin Liu
Summary: This review article presents the physics and technological developments of epitaxial quantum dot devices emitting in the telecom bands for quantum network devices. The challenges and opportunities for future telecom quantum dot devices with improved performance and expanded functionality through hybrid integration are also discussed.
NATURE NANOTECHNOLOGY
(2023)