Article
Quantum Science & Technology
Beatrice Da Lio, Carlos Faurby, Xiaoyan Zhou, Ming Lai Chan, Ravitej Uppu, Henri Thyrrestrup, Sven Scholz, Andreas D. Wieck, Arne Ludwig, Peter Lodahl, Leonardo Midolo
Summary: This article presents a quantum frequency conversion scheme for converting single photons emitted by quantum dots to the telecommunication C band. The conversion achieves high end-to-end efficiency, purity, and indistinguishability.
ADVANCED QUANTUM TECHNOLOGIES
(2022)
Article
Chemistry, Multidisciplinary
Quanbo Jiang, Prithu Roy, Jean-Benoit Claude, Jerome Wenger
Summary: In this research, plasmonic nanoantennas were used to trap single colloidal quantum dots and enhance their photoluminescence without the need for further processing, achieving precise positioning of the quantum emitter at the nanoantenna hotspot. The dedicated nanoantenna design exhibited high trap stiffness for quantum dot trapping and relatively low trapping power, resulting in significantly improved emission characteristics of the single quantum dot.
Article
Multidisciplinary Sciences
B. Jonas, D. Heinze, E. Schoell, P. Kallert, T. Langer, S. Krehs, A. Widhalm, K. D. Joens, D. Reuter, S. Schumacher, A. Zrenner
Summary: The authors introduce an all-optical nonlinear method to tailor and control the single photon emission. They demonstrate energy tuning and polarization control of the emitted photons through a laser-controlled down-conversion process.
NATURE COMMUNICATIONS
(2022)
Article
Optics
M. V. Rakhlin, A. I. Galimov, I. V. Dyakonov, N. N. Skryabin, G. V. Klimko, M. M. Kulagina, Yu. M. Zadiranov, S. V. Sorokin, I. V. Sedova, Yu. A. Guseva, D. S. Berezina, Yu. M. Serov, N. A. Maleev, A. G. Kuzmenkov, S. I. Troshkov, K. V. Taratorin, A. K. Skalkin, S. S. Straupe, S. P. Kulik, T. V. Shubina, A. A. Toropov
Summary: The characteristics of a single-photon emitter based on a semiconductor quantum dot depend on the stability of the recombination channel. A study shows that dominant recombination through neutral exciton states can be achieved by controlling the doping profile near the quantum dot. Experimental results demonstrate high indistinguishability and brightness of successively emitted single photons, enabling spatio-temporal demultiplexing of photons in six independent spatial modes.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Multidisciplinary
Sascha Kolatschek, Cornelius Nawrath, Stephanie Bauer, Jiasheng Huang, Julius Fischer, Robert Sittig, Michael Jetter, Simone Luca Portalupi, Peter Michler
Summary: The combination of semiconductor quantum dots with photonic cavities has shown promising results in achieving nonclassical light sources with high brightness, indistinguishability, and repetition rate. By coupling InGaAs/GaAs QDs to a circular Bragg grating cavity, enhancements in geometric extraction efficiency and brightness have been demonstrated under different excitation conditions. Through p-shell pumping, high count rates with pure single-photon emission have been achieved, along with good single-photon purity at temperatures of up to 77 K.
Article
Chemistry, Multidisciplinary
Arka Bikash Dey, Milan K. Sanyal, Andreas Schropp, Silvio Achilles, Thomas F. Keller, Ian Farrer, David A. Ritchie, Florian Bertram, Christian G. Schroer, Oliver H. Seeck
Summary: Epitaxially grown self-assembled semiconductor quantum dots (QDs) with atom-like optical properties have emerged as the best choice for single-photon sources required for the development of quantum technology and quantum networks. Scanning X-ray diffraction microscopy and X-ray fluorescence can be used to nondestructively select a single QD with desired structural and compositional characteristics, allowing for the production of noise-free, fully indistinguishable single or entangled photons.
Article
Physics, Multidisciplinary
E. N. Knall, C. M. Knaut, R. Bekenstein, D. R. Assumpcao, P. L. Stroganov, W. Gong, Y. Q. Huan, P. -J. Stas, B. Machielse, M. Chalupnik, D. Levonian, A. Suleymanzade, R. Riedinger, H. Park, M. Loncar, M. K. Bhaskar, M. D. Lukin
Summary: This study demonstrates an efficient and high-purity source of single-photon pulses with arbitrary temporal shapes, and successfully detects streams of up to 11 consecutive single photons. This provides an important resource for generating correlated photon streams and transmitting and processing quantum information effectively.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Applied
Likai Yang, Sihao Wang, Hong X. Tang
Summary: Atomic-like emitters in the solid state play a crucial role in the development of future quantum networks. This study demonstrates the optical coherence of erbium ions doped in thin-film lithium niobate using photonic crystal resonators. The combination of long coherence and strong Purcell enhancement in the cavity leads to a coherence time approaching the radiative limit, which is a significant improvement compared to the waveguide case. This research holds promising prospects for utilizing rare earth doped materials as quantum repeaters and sources of indistinguishable photons.
APPLIED PHYSICS LETTERS
(2023)
Article
Quantum Science & Technology
Marco De Gregorio, Shangxuan Yu, Donald Witt, Becky Lin, Matthew Mitchell, Lukasz Dusanowski, Christian Schneider, Lukas Chrostowski, Tobias Huber-Loyola, Sven Hoefling, Jeff F. Young, Andreas Pfenning
Summary: The collection of single-photon emission from a quantum dot is demonstrated using a Bragg waveguide and a photonic wire bond in a cryogenic environment. The use of the photonic wire bond eliminates the need for in-cryostat alignment, offering a scalable integration of quantum photonic devices. The findings highlight the feasibility of using photonic wire bonds for single-photon collection at low temperatures.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Minho Choi, Mireu Lee, Sung-Yul L. Park, Byung Su Kim, Seongmoon Jun, Suk In Park, Jin Dong Song, Young-Ho Ko, Yong-Hoon Cho
Summary: In this study, a method is proposed to deterministically integrate single quantum dots with tailor-made photonic structures. A nondestructive luminescence picking method called nanoscale-focus pinspot (NFP) is used to reduce the luminous quantum dot density. The selected quantum dot is then deterministically integrated with a tailor-made photonic structure, leading to improved extraction efficiency.
ADVANCED MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Jin-Woo Chae, Jin-Hun Kim, Youn-Chang Jeong, Yoon-Ho Kim
Summary: In this work, a tunable up-conversion single-photon detector module that covers the complete telecom C band is reported, making it suitable for quantum communication networks based on sharing wavelength-multiplexed entangled photons.
Article
Materials Science, Multidisciplinary
Ziyu Wang, Abdullah Rasmita, Guankui Long, Disheng Chen, Chusheng Zhang, Oscar Garcia Garcia, Hongbing Cai, Qihua Xiong, Wei-bo Gao
Summary: Photon superbunching, achieved in this study using CsPbBr3 quantum dots, is a crucial resource for quantum communication and computation. The large g((2))(0) value of 30 was obtained from a single CsPbBr3 QD emission at cryogenic temperature, identifying cascaded emission as the cause of superbunching. This research has implications on the fundamental understanding and application of single perovskite QD emission as a quantum light source.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Alejandro Manjavacas, F. Javier Garcia de Abajo
Summary: Single-photon emitters are essential for quantum technologies, but generating single photons along specific directions usually requires complex configurations. In this study, we propose a photon source that can efficiently generate single photons along guided modes. By placing a quantum emitter in a periodically patterned linear waveguide, the emission of photons is preferentially directed along the waveguide in a region close to the period, resulting in a significant reduction in temporal uncertainty. Our research opens up a new approach for producing highly directional single photons with reduced temporal uncertainty.
Article
Multidisciplinary Sciences
Run-Ze Liu, Yu-Kun Qiao, Han-Sen Zhong, Zhen-Xuan Ge, Hui Wang, Tung-Hsun Chung, Chao-Yang Lu, Yong-Heng Huo, Jian-Wei Pan
Summary: Semiconductor quantum dots have demonstrated deterministic photon pair generation with high polarization entanglement fidelity for quantum information applications. However, the limited photon indistinguishability due to temporal correlation hinders their scalability to multi-photon experiments. In this study, by utilizing quantum interferences to decouple polarization entanglement from temporal correlation, the entanglement fidelity of four-photon Greenberger-Horne-Zeilinger (GHZ) state is improved. This work paves the way for realizing scalable and high-quality multi-photon states from quantum dots.
Article
Chemistry, Multidisciplinary
Tristan Farrow, Amit R. Dhawan, Ashley R. Marshall, Alexander Ghorbal, Wonmin Son, Henry J. Snaith, Jason M. Smith, Robert A. Taylor
Summary: The study demonstrates a room-temperature ultranarrow bandwidth single-photon source that can generate high-purity single-photon emission with high efficiency. This has significant potential for applications in photonics and quantum technologies.
Article
Physics, Applied
Jiaqi Hu, Nathanial Lydick, Zhaorong Wang, F. Jabeen, C. Schneider, Sven Hoefling, Hui Deng, Hui Deng
Summary: Exciton-polaritons have become a promising platform for non-Hermitian physics. This article presents an experimental method using microcavities with sub-wavelength gratings as reflectors to control the energy and linewidth of polariton modes.
APPLIED PHYSICS LETTERS
(2022)
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
D. A. Long, S. M. Bresler, Y. Bao, B. J. Reschovsky, J. T. Hodges, J. R. Lawall, T. W. Lebrun, J. J. Gorman
Summary: Traditional electro-optic frequency comb spectrometers can be replaced by using an electro-optic phase modulator (EOM) driven by a sawtooth waveform to induce serrodyne modulation. This allows for direct frequency comb spectroscopy to be performed with a single dual-drive Mach-Zehnder modulator (DD-MZM), leading to lower differential phase noise. Additionally, this method simplifies the production of integrated photonic comb spectrometers on the chip scale.
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
Materials Science, Multidisciplinary
Michael D. Fraser, H. Hoe Tan, Yago del Valle Inclan Redondo, Hima Kavuri, Elena A. Ostrovskaya, Christian Schneider, Sven Hoefling, Yoshihisa Yamamoto, Seigo Tarucha
Summary: The use of high energy proton implantation allows for precise and independent manipulation of both exciton and photon energies in GaAs microcavity exciton-polaritons. This technique involves post-growth proton implantation and annealing steps to induce small local interdiffusion, resulting in energy shifts in exciton or photon components. The polariton mode can be tuned by more than 10 meV, altering the effective mass for photon and exciton energy shifts, while maintaining narrow-linewidth polariton emission and condensation.
ADVANCED OPTICAL MATERIALS
(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
Ruixuan Wang, Jingwei Li, Lutong Cai, Qing Li
Summary: In this study, the Pockels effect was explored in high-Q 4H-SiC microresonators, and gigahertz-level electrooptic modulation was demonstrated for the first time. The Pockels coefficients were found to vary among 4H-SiC wafers from different manufacturers.
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
Optics
Xueshi Li, Shunfa Liu, Yuming Wei, Jiantao Ma, Changkun Song, Ying Yu, Rongbin Su, Wei Geng, Haiqiao Ni, Hanqing Liu, Xiangbin Su, Zhichuan Niu, You-ling Chen, Jin Liu
Summary: The emerging hybrid integrated quantum photonics combines the advantages of different functional components into a single chip to meet the stringent requirements for quantum information processing. In this work, bright semiconductor single-photon sources (SPSs) were heterogeneously integrated with electrically-injected microlasers on a chip, generating pure single photons with a high-brightness of 3.8 M/s count rate and 25.44% extraction efficiency. This work provides a powerful tool for advancing hybrid integrated quantum photonics and boosts the developments for realizing highly-compact, energy-efficient, and coherent SPSs.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Physics, Applied
Jingwei Li, Ruixuan Wang, Lutong Cai, Qing Li
Summary: The unique material property of silicon carbide (SiC) and the recent demonstration of low-loss SiC-on-insulator integrated photonics platform have attracted considerable research interests. The Kerr nonlinearity among 4H-SiC wafers from major wafer manufacturers has been investigated and the best Kerr nonlinear refractive index of 4H-SiC wafers is estimated to be approximately 4 times of stoichiometric silicon nitride. Experimental evidence also shows that the Kerr nonlinearity in 4H-SiC wafers can be stronger along the c axis.
PHYSICAL REVIEW APPLIED
(2023)
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.
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)
Review
Physics, Applied
Alexey Kavokin, Timothy C. H. Liew, Christian Schneider, Pavlos G. Lagoudakis, Sebastian Klembt, Sven Hoefling
Summary: Polariton lasers emit coherent monochromatic light through a spontaneous emission process and show properties of Bose-Einstein condensation and superfluidity at room temperature. Emerging material systems for polariton lasers include organic molecules, transition metal dichalcogenides, perovskites, and liquid-crystal microcavities, which have potential applications in topological lasing, classical neuromorphic computing, and quantum information processing. Polaritonics, the study of strongly coupled light-matter states, offers advantages in classical and quantum information processing with full optical control and read-out capabilities.
NATURE REVIEWS PHYSICS
(2022)