Article
Chemistry, Multidisciplinary
Mohammad Rashidi, Tuomas Haggren, Zhicheng Su, Chennupati Jagadish, Sudha Mokkapati, Hark H. Tan
Summary: Random lasers in GaAs nanowires can lase in resonant and nonresonant modes, depending on whether the nanowires are randomly oriented or vertically aligned. Numerical simulations show that aligned nanowires increase scattering efficiency and favor resonant lasing. Suppressing resonant modes optically can be achieved by increasing the number of excited modes.
Article
Optics
Anirban Sarkar, B. N. Shivakiran Bhaktha
Summary: This study reveals a replica symmetry breaking phase transition independently in both coherent and incoherent parts of intensity. The incoherent component contributes more to mode coupling and significantly determines the decay profile of lasing intensity.
Article
Optics
Colton Fruhling, Kang Wang, Sarah Chowdhury, Xiaohui Xu, Jeffrey Simon, Alexander Kildishev, Letian Dou, Xiangeng Meng, Alexandra Boltasseva, Vladimir M. Shalaev
Summary: Coherent random lasing in subwavelength quasi-2D perovskite films is observed and studied. Statistical analysis reveals Levy-like intensity fluctuations, replica symmetry breaking confirms random lasing, and spectral and spatial correlation techniques are used to study coherent modes. The observed coherent lasing modes are extended states that result from the random crystal grain structure during fabrication and out-compete diffusive lasing due to their coherence.
LASER & PHOTONICS REVIEWS
(2023)
Article
Quantum Science & Technology
Marcin Lobejko
Summary: This article investigates the quasi-probability distribution of energy for an isolated quantum system coupled to an energy-storage device. It analyzes the trade-off between changes in average energy and changes in the variance of the weight, where work is extracted from the coherent and incoherent ergotropy of the system. The study reveals that the extraction of positive coherent ergotropy can reduce work fluctuations by utilizing non-classical states of a work reservoir.
Article
Engineering, Electrical & Electronic
Mingwang Tian, Mingfang Li, Xin Xu, ZiYu Hua, Yidong Tan
Summary: Based on the Nd:YVO4 microchip laser frequency-shifted feedback system, ultra-weak light signals are detected with a response limit of 0.5 photon per second. The laser feedback technology shows higher response sensitivity compared to the traditional Mach-Zehnder heterodyne interference system in detecting cooperative and non-cooperative targets. In a long-distance weak light imaging experiment, a THU pattern made of unpolished aluminum blocks is successfully reconstructed at a distance of 60 m, achieving a response energy as low as 2 x 10^(-5) photon per frequency modulation cycle of 0.42 μs.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Sergio Rota-Rodrigo, Daniel Leandro, Giorgio Santarelli, Manuel Lopez-Amo, Juan Diego Ania-Castanon
Summary: We experimentally explored the relation between spectral linewidth and RIN transfer in half-open cavity random distributed feedback Raman lasers and demonstrated the possibility of adjusting the pump-to-signal RIN transfer intensity and cut-off frequency using spectral filtering in the reflector section. We applied this approach to a 50-km laser system operating in the C-Band.
Article
Materials Science, Multidisciplinary
R. A. Ejbarah, J. M. Jassim, S. F. Haddawi, S. M. Hamidi
Summary: The study showed that the sizes and concentrations of silver nanowires have a significant impact on the optical amplification mechanism, thresholds, narrowing of emission intensity, and the transition from incoherent to coherent random laser. The emergence of spikes and their increase in number are also discussed under the influence of silver nanowires. Gain narrowing and enhancement factor calculations were done to reinforce the obtained results.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Mathematics, Applied
Jared C. Bronski, Timothy Ferguson
Summary: This paper reveals the algebraic-combinatorial structure underlying the second order networks (SONETS) random graph model proposed by Zhao et al., and demonstrates its connection with a non-commuting generalization of the classical Johnson scheme. The study shows that the algebraic structure leads to simplified numerical methods for implementing the SONETS algorithm, and that the method can be generalized to different types of vertices and edges while maintaining similar algebraic structure.
PHYSICA D-NONLINEAR PHENOMENA
(2022)
Article
Engineering, Electrical & Electronic
Ruifeng Li, Zhijia Hu, Hongtao Li, Yunkun Zhao, Keyan Liu, Yourui Tu, Zhengting Du, Qi Yu, Benli Yu, Liang Lu
Summary: This article proposes an all-fiber self-mixing velocimeter based on a DBR fiber laser with adjustable injection intensity for the first time. The behavior of fiber lasers in detecting non-cooperative targets under different injection intensities is explored theoretically and experimentally. The results show that the coherence distance of the laser is greatly extended and the intensity noise is significantly suppressed when the ultra-strong injection level is reached. The velocimeter successfully achieves non-cooperative target velocity measurement with a 40 km single-channel transmission distance. It is of great significance in the field of remote sensing due to its simple and compact configuration and adjustable dynamical monitoring range.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Quantum Science & Technology
Yi-Fei Lu, Yang Wang, Mu-Sheng Jiang, Fan Liu, Xiao-Xu Zhang, Wan-Su Bao
Summary: This paper investigates the lower bound of single-photon states yield in a practical four-intensity decoy-state SNS TF-QKD system and conducts finite key analysis. The study reveals that intensity fluctuations have a significant impact on system performance, with strong intensity states showing more robustness and weak intensity states being more sensitive.
QUANTUM INFORMATION PROCESSING
(2021)
Article
Engineering, Electrical & Electronic
Jiancheng Deng, Ming Shen, Yanxin Li, D. Churkin, Xuewen Shu
Summary: This study proposes and demonstrates the power scalability in a novel random Raman fiber laser (RRFL) with localized random feedback. The use of a low-reflection random fiber grating (RFG) composed of a randomly distributed sub-grating array enables the power scalability. The spectral filtering is implemented by a high-reflection fiber Bragg grating to ensure laser emission at the wavelength of the highest reflection peak of the RFG.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Mechanics
Jacopo Niedda, Luca Leuzzi, Giacomo Gradenigo
Summary: Evidence of an emergent pseudo-localized phase is found in the low-temperature replica symmetry breaking phase of the complex disordered models for glassy light, specifically in the mode-locked random laser model. This hybrid phase, previously observed as a finite size effect in other models, seems to be robust in the limit of large size in the low temperature phase of the glassy random laser.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2023)
Article
Mechanics
Ariane Soret, Ohad Shpielberg, Eric Akkermans
Summary: Thermodynamic uncertainty relations are extended to zero temperature quantum mesoscopic physics, revealing connections between fluctuations and entropy production. The cost function, as a bound on fluctuations induced by coherent effects, is identified as a critical resource in quantum mesoscopic physics, demonstrating the potential of importing powerful methods from non-equilibrium statistical physics.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2021)
Article
Optics
Milo W. Hyde, Olga Korotkova, Mark F. Spencer
Summary: We analyze three non-stationary partially coherent sources, which have coherent modes of spatiotemporal optical vortex (STOV) beams. By using spatiotemporal (ST) Bessel-Gauss and Laguerre-Gauss beams as eigenfunctions, we derive ST versions of J (0)-Bessel-correlated, I (n)-Bessel-correlated, and twisted Gaussian Schell-model beams. The simulated results and theoretical analysis provide insights into the free-space propagation characteristics of these ST beams, which can be useful for applications and future studies.
Article
Optics
Nikollao Sulollari, James Keeley, SaeJune Park, Pierluigi Rubino, Andrew D. Burnett, Lianhe Li, Mark C. Rosamond, Edmund H. Linfield, A. Giles Davies, John E. Cunningham, Paul Dean
Summary: Near-field microscopy techniques operating in the terahertz frequency band allow for visualizing localized THz fields with nanometric resolution, promising to advance the development and characterization of various devices.
Article
Optics
Manashee Adhikary, Ravitej Uppu, Cornelis A. M. Harteveld, Diana A. Grishina, Willem L. Vos
Article
Optics
Xiaoyan Zhou, Ravitej Uppu, Zhe Liu, Camille Papon, Ruediger Schott, Andreas D. Wieck, Arne Ludwig, Peter Lodahl, Leonardo Midolo
LASER & PHOTONICS REVIEWS
(2020)
Article
Multidisciplinary Sciences
Ravitej Uppu, Hans T. Eriksen, Henri Thyrrestrup, Asli D. Ugurlu, Ying Wang, Sven Scholz, Andreas D. Wieck, Arne Ludwig, Matthias C. Lobl, Richard J. Warburton, Peter Lodahl, Leonardo Midolo
NATURE COMMUNICATIONS
(2020)
Article
Nanoscience & Nanotechnology
Freja T. Pedersen, Ying Wang, Cecilie T. Olesen, Sven Scholz, Andreas D. Wieck, Arne Ludwig, Matthias C. LObl, Richard J. Warburton, Leonardo Midolo, Ravitej Uppu, Peter Lodahl
Article
Multidisciplinary Sciences
Ravitej Uppu, Freja T. Pedersen, Ying Wang, Cecilie T. Olesen, Camille Papon, Xiaoyan Zhou, Leonardo Midolo, Sven Scholz, Andreas D. Wieck, Arne Ludwig, Peter Lodahl
Article
Physics, Applied
Ying Wang, Ravitej Uppu, Xiaoyan Zhou, Camille Papon, Sven Scholz, Andreas D. Wieck, Arne Ludwig, Peter Lodahl, Leonardo Midolo
Summary: The study focused on analyzing the electroabsorption in thin GaAs/Al0.3Ga0.7As nanophotonic waveguides with an embedded p-i-n junction. Transmission measurements of waveguides of different lengths were used to derive the propagation loss in relation to the electric field, wavelength, and temperature. The results, in agreement with the Franz-Keldysh model, are crucial for understanding the loss in nanophotonic devices operating in the emission range of self-assembled InAs semiconductor quantum dots towards scalable quantum photonic integrated circuits.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Multidisciplinary
Ravitej Uppu, Manashee Adhikary, Cornelis A. M. Harteveld, Willem L. Vos
Summary: By shaping the wave fronts spatially, waves can be transported much deeper into two-dimensional silicon photonic crystals, with the energy density enhanced at a tunable distance from the front surface, extending up to 8 times the Bragg length. This novel control method for mesoscopic wave transport is applicable to any type of waves.
PHYSICAL REVIEW LETTERS
(2021)
Review
Nanoscience & Nanotechnology
Ravitej Uppu, Leonardo Midolo, Xiaoyan Zhou, Jacques Carolan, Peter Lodahl
Summary: Scaling up quantum hardware is crucial for realizing the full potential of quantum technology, with photonics offering a modular approach and solid-state quantum emitters enabling key quantum functionalities. The use of integrated photonics foundry technology can lead to small-footprint quantum processors, while deterministic photon-emitter interfaces could pave the way for resource-efficient hardware architectures in quantum communication and computing applications.
NATURE NANOTECHNOLOGY
(2021)
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
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)
Proceedings Paper
Engineering, Electrical & Electronic
Manashee Adhikary, Marek Kozon, Ravitej Uppu, Cornelis A. M. Harteveld, Willem L. Vos
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC)
(2021)
Article
Materials Science, Multidisciplinary
Evangelos Marakis, Ravitej Uppu, Maryna L. Meretska, Klaas-Jan Gorter, Willem L. Vos, Pepijn W. H. Pinkse
ADVANCED OPTICAL MATERIALS
(2020)
Article
Quantum Science & Technology
Asli D. Ugurlu, Henri Thyrrestrup, Ravitej Uppu, Clauderic Ouellet-Plamondon, Ruediger Schott, Andreas D. Wieck, Arne Ludwig, Peter Lodahl, Leonardo Midolo
ADVANCED QUANTUM TECHNOLOGIES
(2020)
Article
Physics, Fluids & Plasmas
Evangelos Marakis, Matthias C. Velsink, Lars J. Corbijn van Willenswaard, Ravitej Uppu, Pepijn W. H. Pinkse
