Editorial Material
Multidisciplinary Sciences
David Gozzard
Summary: Scientists have successfully transmitted time signals across a distance of 300 kilometers with accuracy and precision only limited by the quantum nature of photons. This achievement holds the potential to revolutionize high-precision scientific research using satellites.
Article
Physics, Multidisciplinary
Francesco Andreoli, Michael J. Gullans, Alexander A. High, Antoine Browaeys, Darrick E. Chang
Summary: Despite the giant optical response from an isolated atom, the maximum refractive index of optical materials does not indefinitely increase with density, but instead reaches a limiting value of approximately 1.7. This limit is determined by electrodynamics and is attributed to the near-field interaction combined with random atomic positions, leading to inhomogeneous broadening of atomic resonance frequencies, and limiting the maximum achievable index.
Article
Physics, Multidisciplinary
Gian-Luca Schmid, Chun Tat Ngai, Maryse Ernzer, Manel Bosch Aguilera, Thomas M. Karg, Philipp Treutlein
Summary: By utilizing optical coherent feedback, nanomechanical membrane cooling was achieved remotely using atomic spins as a controller, leading to cooling the membrane to a very low temperature at room temperature. This method has the potential to cool the mechanical oscillator close to its quantum mechanical ground state and prepare nonclassical states.
Review
Optics
Jian Zhang, Shaohui Zhang, Yule Zhang, Omar A. Al-Hartomy, Swelm Wageh, Abdullah G. Al-Sehemi, Yabin Hao, Lingfeng Gao, Hao Wang, Han Zhang
Summary: This review provides a comprehensive evaluation of the optoelectronic application levels of semiconductor quantum dots (SQDs), perovskite quantum dots (PQDs), and carbon quantum dots (CDs), as well as a detailed summary of photocatalysis. The article discusses the compositions and optoelectronic properties of the three types of quantum dots, compares their strengths and weaknesses, demonstrates their flourishing development in various optoelectronic applications, and identifies bottlenecks and opportunities for future breakthroughs.
LASER & PHOTONICS REVIEWS
(2023)
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
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.
Article
Chemistry, Multidisciplinary
Athanasios Smponias, Dionisis Stefanatos, Emmanuel Paspalakis
Summary: In this study, a hybrid nanostructure composed of a semiconductor quantum dot coupled to a metallic nanoparticle was investigated for the efficient creation of biexciton state using linearly polarized laser pulses. Numerical simulations showed that a simple on-off-on pulse-sequence can efficiently prepare the biexciton state even in the presence of the nanoparticle, for various interparticle distances and biexciton energy shifts. The pulse durations in the sequence were determined by solving a transcendental equation.
Article
Chemistry, Multidisciplinary
Partha Kumbhakar, Abhirup Roy Karmakar, Gour Prasad Das, Jayjeet Chakraborty, Chandra S. Tiwary, Pathik Kumbhakar
Summary: The reversible temperature-dependent PL emission quenching properties of Mn2+-doped ZnS QDs have been utilized for the development of a smartphone-based optical thermometer. By studying the temperature-dependent variations of PL, the technique has been successfully applied in polymer films and validated through thermal cycling experiments and the use of a custom Android App for temperature measurement.
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
Chemistry, Multidisciplinary
Zih-Lin Yang, Gautam Kumar, Michael H. Huang
Summary: CdSe nanocrystals with different sizes were synthesized under different experimental conditions, leading to products with different sizes and properties. The crystal structure, optical properties, and electrochemical properties of the nanocrystals were systematically studied.
Article
Optics
Christian Schimpf, Santanu Manna, Saimon F. Covre da Silva, Maximilian Aigner, Armando Rastelli
Summary: Semiconductor quantum dots show promise in generating highly entangled photon pairs for quantum key distribution, with potential applications in satellite-based quantum communication. Operation at temperatures above 20K and ongoing research in electrical control and strain engineering may further enhance their capabilities for real-world use.
ADVANCED PHOTONICS
(2021)
Article
Chemistry, Physical
Biswajit Bhattacharyya, Arpita Mukherjee, Rekha Mahadevu, Anshu Pandey
Summary: The research focuses on the electronic structure and manipulation of spontaneous emission lifetimes of copper-doped CdZnSe quantum dots. By varying the density of electronic states involved in the emission process, the spontaneous emission lifetimes can be continuously tuned from nanoseconds to microseconds, representing a significant advancement in luminescent materials.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Quantum Science & Technology
Si-Si Gu, Bao-Chuan Wang, Ming-Bo Chen, Ting Lin, Yuan Kang, Hai-Ou Li, Gang Cao, Guo-Ping Guo
Summary: The integration of quantum dots with a microwave resonator in the hybrid circuit quantum electrodynamics architecture has created a controllable artificial system and enriched physics through electron-photon interaction. The study investigates a hybrid device where a triple quantum dot is dipole coupled with the electric field of a superconducting quantum interference device array resonator. The results suggest that the hybrid system has the potential to investigate exotic many-body effects and matter-light interaction, depending on the relationship between various Coulomb energy in the quantum dot and the cavity photon energy.
ADVANCED QUANTUM TECHNOLOGIES
(2022)
Article
Chemistry, Multidisciplinary
Ajit Vikram, Ken Brudnak, Arwa Zahid, Moonsub Shim, Paul J. A. Kenis
Summary: Colloidal semiconductor nanocrystals with tunable optical and electronic properties offer exciting opportunities for various applications, but identifying optimal synthesis conditions and screening of recipes remain major challenges. An autonomous experimentation platform incorporating machine-learning and automated reactor can accelerate synthesis screening and optimization.
Article
Quantum Science & Technology
Manish Kumar Mehta, Joseph Thomas Andrews, Pratima Sen
Summary: In this paper, a novel method is proposed to overcome the limitations of exciton and biexciton states only appearing at low temperatures, as well as the complexity of using lasers with different polarization states for CNOT operations. By utilizing ultrafast magnetic pulse CNOT gate operation in Mn-doped InSb quantum dots at room temperature, with only a circularly polarized laser pulse, the proposed method shows a significantly large fidelity calculation for CNOT gate.
QUANTUM INFORMATION PROCESSING
(2021)
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
Physics, Multidisciplinary
G. Arregui, R. C. Ng, M. Albrechtsen, S. Stobbe, C. M. Sotomayor-Torres, P. D. Garcia
Summary: Confining photons in cavities enhances the interaction between light and matter. We have demonstrated how sidewall roughness in air-slot photonic-crystal waveguides can induce Anderson-localized modes with high quality factors and mode volumes below the diffraction limit. The interaction between these disorder-induced optical modes and in-plane mechanical modes is governed by a distribution of coupling rates, leading to mechanical amplification via optomechanical backaction. This study opens up new possibilities for exploring complex systems with mutually coupled degrees of freedom.
PHYSICAL REVIEW LETTERS
(2023)
Article
Multidisciplinary Sciences
Alexey Tiranov, Vasiliki Angelopoulou, Bjorn Schrinski, Cornelis Jacobus van Diepen, Oliver August Dall Alba Sandberg, Ying Wang, Leonardo Midolo, Sven Scholz, Andreas Dirk Wieck, Arne Ludwig, Anders Sondberg Sorensen, Peter Lodahl
Summary: Photon emission is fundamental for light-matter interaction and photonic quantum science. This study demonstrates distant dipole-dipole radiative coupling in solid-state optical quantum emitters embedded in a nanophotonic waveguide. The collective response and emission dynamics can be controlled by proper excitation techniques. This work is a foundational step towards multiemitter applications for scalable quantum-information processing.
Article
Optics
Christian Anker Rosiek, Guillermo Arregui, Anastasiia Vladimirova, Marcus Albrechtsen, Babak Vosoughi Lahijani, Rasmus Ellebaek Christiansen, Soren Stobbe
Summary: This study investigates the practical value of topological protection in reciprocal photonics. Measurements of propagation losses in valley-Hall topological waveguides in the slow-light regime show no evidence of topological protection against backscattering on structural defects. Light's unique properties support the development of photonic quantum technologies, optical interconnects, and novel sensors, but losses due to absorption or backscattering are a key limitation.
Article
Optics
Soren Engelberth Ansen, Guillermo Arregui, Ali Nawaz Babar, Marcus Albrechtsen, Babak Vosoughi Lahijani, Rasmus Ellebaek Christiansen, Soren Stobbe
Summary: We designed and fabricated a grating coupler that can interface suspended silicon photonic membranes with free-space optics in a single-step lithography and etching process in 220 nm silicon device layers. The coupler design achieved high transmission and low reflection by combining two-dimensional shape optimization and three-dimensional parameterized extrusion. The experimentally verified coupler had a transmission of -6.6 dB (21.8%), a 3 dB bandwidth of 75 nm, and a reflection of -27 dB (0.2%).
Article
Physics, Multidisciplinary
Guilhem Madiot, Ryan C. Ng, Guillermo Arregui, Omar Florez, Marcus Albrechtsen, Soren Stobbe, Pedro D. Garcia, Clivia M. Sotomayor-Torres
Summary: This study investigates the optomechanical generation of coherent phonons at 6.8 GHz frequency, operating at room temperature. By using a suspended 2D silicon phononic crystal cavity with an air-slot, the phononic waveguide is turned into an optomechanical platform that allows for fine control of phonons using light. This development could potentially lead to the advancement of phononic circuitry and coherent manipulation of other solid-state properties.
PHYSICAL REVIEW LETTERS
(2023)
Article
Quantum Science & Technology
Ming Lai Chan, Alexey Tiranov, Martin Hayhurst Appel, Ying Wang, Leonardo Midolo, Sven Scholz, Andreas D. Wieck, Arne Ludwig, Anders Sondberg Sorensen, Peter Lodahl
Summary: We have demonstrated high-fidelity on-chip entanglement between an incoming photon and a stationary quantum-dot hole spin qubit using self-assembled quantum dots integrated into nanostructures. The entanglement is induced by sequential scattering of the time-bin encoded photon interleaved with active spin control within a microsecond, two orders of magnitude faster than other solid-state platforms. The entanglement fidelity is immune to the spectral wandering of the emitter when conditioned on the detection of a reflected photon. These results represent a major step towards realizing a quantum node capable of interchanging information with flying photons and on-chip quantum logic for quantum networks and repeaters.
NPJ QUANTUM INFORMATION
(2023)
Article
Multidisciplinary Sciences
Patrik I. Sund, Emma Lomonte, Stefano Paesani, Ying Wang, Jacques Carolan, Nikolai Bart, Andreas D. Wieck, Arne Ludwig, Leonardo Midolo, Wolfram H. P. Pernice, Peter Lodahl, Francesco Lenzini
Summary: Scalable photonic quantum computing requires low-loss high-speed reconfigurable circuits and near-deterministic resource state generators. In this study, we developed an integrated photonic platform based on thin-film lithium niobate and combined it with deterministic solid-state single-photon sources based on quantum dots in nanophotonic waveguides. The generated photons were processed using low-loss circuits programmable at speeds of several gigahertz, enabling various key photonic quantum information processing functionalities. This approach shows promise for scalable photonic quantum technologies by merging integrated photonics with solid-state deterministic photon sources.
Article
Physics, Multidisciplinary
Xiao-Liu Chu, Camille Papon, Nikolai Bart, Andreas D. Wieck, Arne Ludwig, Leonardo Midolo, Nir Rotenberg, Peter Lodahl
Summary: Efficient light-matter interaction at the single-photon level is achieved by coupling two semiconductor quantum dot emitters to a photonic-crystal waveguide and individually controlling them using a local electric Stark field. Resonant transmission and fluorescence spectra confirm the coupling of the two emitters to the waveguide. The single-photon stream from one quantum dot is utilized for spectroscopy on the second quantum dot positioned 16 μm away, and power-dependent resonant transmission measurements indicate coherent coupling between the emitters. This work presents a scalable route to achieve multiemitter collective coupling for solid-state deterministic photon emitters.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Applied
C. Papon, Y. Wang, R. Uppu, S. Scholz, A. D. Wieck, A. Ludwig, P. Lodahl, L. Midolo
Summary: We achieve on-chip single-photon generation in multiple spatial modes by resonantly exciting two quantum dots in a photonic integrated circuit. The emission wavelength of the two quantum dots is tuned to be the same using isolated p-i-n junctions, and they are excited by a resonant pump laser via dual-mode waveguides. Under continuous-wave excitation of narrow-linewidth quantum dots, we demonstrate a two-photon quantum interference visibility of (79 ± 2)%. Our work solves a significant challenge in quantum photonics by realizing how to scale up deterministic single-photon sources.
PHYSICAL REVIEW APPLIED
(2023)
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
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
Physics, Multidisciplinary
Nils Valentin Hauff, Hanna Le Jeannic, Peter Lodahl, Stephen Hughes, Nir Rotenberg
Summary: This paper quantifies the performance of conventional and topological photonic crystal waveguides as chiral emitter-photon interfaces through full-wave three-dimensional calculations and finds that topological waveguides have higher performance. Furthermore, the paper points out that topological waveguides reduce backscattering losses caused by fabrication imperfections.
PHYSICAL REVIEW RESEARCH
(2022)
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
Optics
Konstantin Tiurev, Martin Hayhurst Appel, Pol Llopart Mirambell, Mikkel Bloch Lauritzen, Alexey Tiranov, Peter Lodahl, Anders Sondberg Sorensen
Summary: This study proposes a new approach for generating entangled multiphoton states with higher quality than traditional methods. The method utilizes a quantum-dot emitter and a photonic crystal waveguide to achieve an efficient light-matter interface. By considering all experimental imperfections, the quality of the generated photonic states from a real system is evaluated.
