Article
Materials Science, Multidisciplinary
Naveen Kumar Reddy Bogireddy, Vivechana Agarwal
Summary: Carbon dots prepared using 10-Undeceonic acid as an organic precursor exhibit broad range excitation wavelength-dependent photoluminescence, with excitation wavelength-dependent upconversion and downconversion photoluminescence. The UCPL/DCPL can be explained by the presence of surface states, shallow and deep trap states in the carbon dots.
Article
Chemistry, Multidisciplinary
Rong Huang, Songbin Liu, Jinshu Huang, Huiming Liu, Zhiyong Hu, Lili Tao, Bo Zhou
Summary: A novel approach for intense upconversion of the holmium sublattice through interfacial energy transfer channels was reported, allowing spatial separation of Ho3+ and Yb3+ to minimize unwanted energy transfers. This design achieved a gradual color change from red to yellowish green upon 808 nm excitation.
Article
Materials Science, Multidisciplinary
Philipp Karl, Sandra Mennle, Monika Ubl, Mario Hentschel, Philipp Flad, Jing-Wei Yang, Tzu-Yu Peng, Yu-Jung Lu, Harald Giessen
Summary: The development of photon-based technologies such as quantum cryptography and quantum computing relies on high-fidelity and fast photodetectors capable of detecting single photons. Superconducting nanowire single photon detectors, utilizing the superconducting-to-normal conducting phase transition, offer a promising solution. Using resonant plasmonic perfect absorber effects, these detectors can achieve high efficiency, polarization-independent absorption at a specific wavelength. Additionally, the target wavelength can be easily adjusted by modifying the detector's geometry.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Chemistry, Multidisciplinary
Yu Wang, Huang Wu, Leighton O. Jones, Martin A. Mosquera, Charlotte L. Stern, George C. Schatz, J. Fraser Stoddart
Summary: Cocrystal engineering is a popular strategy for tuning the photophysical properties of crystalline materials. This research presents a color-tunable upconversion-emission switch based on the interconversion between two cocrystals, demonstrating the reversible transformation and color change mechanism between cocrystals.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Yu Wang, Huang Wu, Leighton O. Jones, Martin A. Mosquera, Charlotte L. Stern, George C. Schatz, J. Fraser Stoddart
Summary: Cocrystal engineering is a popular strategy for tuning the photophysical properties of crystalline materials. This study reports a color-tunable upconversion-emission switch based on the interconversion between two cocrystals. The research provides a critical example of precise control of cocrystal-to-cocrystal transformation and offers a reference for fabricating color tunable nonlinear optical materials in the solid state.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Qianyi Zhang, Antoine Boniface, Virendra K. Parashar, Martin A. M. Gijs, Christophe Moser
Summary: The recent development of light-based 3D printing technologies has revolutionized additive manufacturing. Researchers have proposed using upconversion nanoparticles (UCNPs) in place of traditional two-photon printing (TPP) for photopolymerization. By converting near-infrared (NIR) light into visible/UV light, UCNPs initiate polymerization and open up new possibilities for constructing 3D structures with micrometer feature size using inexpensive light sources.
Article
Chemistry, Physical
Dongping Zhu, Yang Sun, Shuai Yuan, Rongyao Gao, Yi Wang, Xi-Cheng Ai, Jian-Ping Zhang
Summary: This study systematically investigates the mechanism of perovskite-based SPUC-PL and proposes a viable method for tuning SPUC-PL parameters.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Kwang Rok Mun, Jihoon Kyhm, Ja Yeon Lee, Seungyong Shin, Yiyuan Zhu, Gumin Kang, Donghwan Kim, Renren Deng, Ho Seong Jang
Summary: In this study, video-rate color three-dimensional (3D) volumetric displays were demonstrated using elemental-migration-assisted full-color-tunable upconversion nanoparticles (UCNPs). By adjusting the intermediate shell thickness between the core and the sensitizer-doped second shell, red-green orthogonal upconversion luminescence (UCL) was achieved. Highly efficient red-green-blue orthogonal UCL and full-color tunability were achieved in the UCNPs through a combination of elemental-migration-assisted color tuning and selective photon blocking. 3D volumetric displays were fabricated using a UCNP-polydimethylsiloxane composite, allowing for the creation of 3D color images and motion pictures.
Article
Optics
Xiaoqin Yin, Shuzhen Fan, Xingyu Zhang, Yongfu Li, Zhaojun Liu, Xian Zhao, Jiaxiong Fang
Summary: This paper investigates the impact of sum-frequency and difference-frequency conversion on upconversion terahertz-wave detection using organic crystals. Previous studies have disregarded the concurrent effects of these processes, leading to discrepancies between theoretical simulations and experimental results. The proposed four-wave interaction equations analyze the role of sum-frequency conversion, and experimental results confirm the effectiveness of theoretical predictions.
Article
Biochemistry & Molecular Biology
Dorota Bartusik-Aebisher, Mateusz Mielnik, Grzegorz Cieslar, Ewa Chodurek, Aleksandra Kawczyk-Krupka, David Aebisher
Summary: Upconversion is a process that generates shorter-wavelength light compared to the excitation source. It has various applications, including medical research where upconversion nanoparticles are used to illuminate deep tissue. This paper reviews current research in upconversion studies and nanoparticle development.
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
Chemistry, Multidisciplinary
Rinat Meir, Tal Hirschhorn, Sungsoo Kim, Kealan J. Fallon, Emily M. Churchill, Dino Wu, Hee Won Yang, Brent R. Stockwell, Luis M. Campos
Summary: The ability to optically induce biological responses in 3D has been limited by the penetration of visible light, but hydrogels that convert red or near-IR light into blue light have been developed to trigger photochemical responses. This approach allows for precise control of cell function and may lead to new biochemical applications.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Indranil Roy, Subhadip Goswami, Ryan M. Young, Itai Schlesinger, Mohammad Rasel Mian, Alan E. Enciso, Xuan Zhang, Jessica E. Hornick, Omar K. Farha, Michael R. Wasielewski, Joseph T. Hupp, J. Fraser Stoddart
Summary: A pillared-paddlewheel metal-organic framework (MOF) designed for efficient triplet-triplet annihilation upconversion (TTA-UC) was reported, achieving a high efficiency of 1.95% at an excitation power density of 25 mW cm(-2). The precise arrangements of sensitizers with respect to annihilators, and the high annihilator-to-sensitizer ratio, facilitate Dexter energy transfer in this extended structure.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
A-Ra Hong, Ji-Hoon Kyhm, Gumin Kang, Ho Seong Jang
Summary: In this study, rare-earth ion-doped upconversion nanophosphors capable of full-color tunability were reported. These nanophosphors emit blue, green, and red light under different wavelengths, achieving a wide color gamut with rich colors.
Article
Engineering, Electrical & Electronic
Yiwei Chen, Chen Jiang, Yong Liu, Hongye Su, Xiaomin Hu, Yu Pan
Summary: This study presents an upconversion-based single-photon imager for full-range and accurate 3-D imaging. Compared to previous imagers, the proposed system achieves significantly higher imaging speed and improved efficiency. The application of a high-repetition laser and a nanosecond optical delay line enables full-range imaging against high solar background noise.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Physics, Multidisciplinary
Antonio Acin, Immanuel Bloch, Harry Buhrman, Tommaso Calarco, Christopher Eichler, Jens Eisert, Daniel Esteve, Nicolas Gisin, Steffen J. Glaser, Fedor Jelezko, Stefan Kuhr, Maciej Lewenstein, Max F. Riedel, Piet O. Schmidt, Rob Thew, Andreas Wallraff, Ian Walmsley, Frank K. Wilhelm
NEW JOURNAL OF PHYSICS
(2018)
Article
Optics
Farid Samara, Anthony Martin, Claire Autebert, Maxim Karpov, Tobias J. Kippenberg, Hugo Zbinden, Rob Thew
Editorial Material
Quantum Science & Technology
Rob Thew, Thomas Jennewein, Masahide Sasaki
QUANTUM SCIENCE AND TECHNOLOGY
(2020)
Article
Physics, Multidisciplinary
P. Caspar, E. Verbanis, E. Oudot, N. Maring, F. Samara, M. Caloz, M. Perrenoud, P. Sekatski, A. Martin, N. Sangouard, H. Zbinden, R. T. Thew
PHYSICAL REVIEW LETTERS
(2020)
Article
Quantum Science & Technology
Farid Samara, Nicolas Maring, Anthony Martin, Arslan S. Raja, Tobias J. Kippenberg, Hugo Zbinden, Rob Thew
Summary: Integrated photonics technology has the potential to greatly improve quantum communication networks in terms of cost, size, scaling, and robustness. By demonstrating high-performance in complex quantum networking protocols, such as entanglement swapping, there is significant promise for practical, real-world quantum communication applications.
QUANTUM SCIENCE AND TECHNOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Antonina Klimenko, Robin Huber, Laurence Marcourt, Dmitry Tabakaev, Alexey Koval, Salim Sh. Dautov, Tatyana N. N. Dautova, Jean-Luc Wolfender, Rob Thew, Yuri Khotimchenko, Emerson Ferreira Queiroz, Vladimir L. L. Katanaev
Summary: Through metabolite analysis, we have identified five new chlorin compounds from Ophiura sarsii and O. ooplax, demonstrating their potential applications in photodynamic therapy.
Article
Chemistry, Multidisciplinary
Giovanni V. Resta, Lorenzo Stasi, Matthieu Perrenoud, Sylvain El-Khoury, Tiff Brydges, Rob Thew, Hugo Zbinden, Felix Bussieres
Summary: Superconducting nanowire single-photon detectors (SNSPDs) with high system detection efficiency (SDE), low dark counts, and fast recovery time have enabled the realization of various quantum optics technologies. This article presents an SNSPD array composed of 14 independent pixels, achieving an SDE of 90% in the telecommunications band. By reading each pixel of the array independently, the detection of telecommunication photons at 1.5 GHz with 45% absolute SDE is demonstrated. The dynamic photon-number resolution of the array is exploited for accurate state reconstruction of a wide range of light inputs, including long-duration light pulses obtained with cavity-based sources. Two-photon and three-photon fidelities of 74% and 57% are shown, respectively, representing state-of-the-art results for fiber-coupled SNSPDs.
Article
Quantum Science & Technology
Lorenzo Stasi, Patrik Caspar, Tiff Brydges, Hugo Zbinden, Felix Bussieres, Rob Thew
Summary: Herald single-photon sources (HSPS) face the challenge of multiphoton emission, which requires a trade-off between single-photon quality and heralding rate. Photon-number-resolving (PNR) detectors are implemented to filter out heralding events with more than one photon pair, improving the HSPS.
QUANTUM SCIENCE AND TECHNOLOGY
(2023)
Article
Optics
T. Brydges, A. S. Raja, A. Gelmini, G. Lihachev, A. Petitjean, A. Siddharth, H. Tian, R. N. Wang, S. A. Bhave, H. Zbinden, T. J. Kippenberg, R. Thew
Summary: This work demonstrates the capabilities of an entangled photon-pair source at telecom wavelengths, based on a photonic integrated Si3N4 microresonator with monolithically integrated piezoelectric frequency tuning. The use of thermal control for frequency tuning of photon pairs generated by microresonators has limitations in actuation bandwidth and compatibility with cryogenic environments. The study shows the frequency-tunable photon-pair generation capabilities of a Si3N4 microresonator with a monolithically integrated aluminium nitride layer, with orders of magnitude larger locking bandwidth than previous methods using thermal locking.
Article
Quantum Science & Technology
Pavel Sekatski, Enky Oudot, Patrik Caspar, Rob Thew, Nicolas Sangouard
Summary: We argue that the probability of a given source producing a single photon is a natural benchmark to determine the efficiency and absence of multi-photon components in single-photon sources. This can be measured using a balanced beam splitter and two photon detectors. This probability also allows for the certification and quantification of non-classicality properties such as Wigner negativity, non-Gaussianity, and P-negativity. We provide practical tools to account for imperfections in the beam splitter, detection efficiencies, and other statistical effects, and demonstrate the use of the proposed benchmark and measures using a heralded single-photon source. The average probability of producing a single photon is found to be 55% with a Wigner negativity measure of 0.004 and a confidence level of 1 - 10(-10).
Article
Quantum Science & Technology
Patrik Caspar, Enky Oudot, Pavel Sekatski, Nicolas Maring, Anthony Martin, Nicolas Sangouard, Hugo Zbinden, Rob Thew
Summary: This paper proposes an efficient method to certify multipartite single-photon path-entangled states using local measurements. The authors construct an entanglement witness based on local photon detections, which can reveal genuine multipartite entanglement. Experimental results demonstrate the scalability of their method and its potential for distributing photonic multipartite entanglement in quantum networks at high rates.
Article
Optics
D. Tabakaev, M. Montagnese, G. Haack, L. Bonacina, J-P Wolf, H. Zbinden, R. T. Thew
Summary: This study experimentally demonstrates the linear dependence of entangled two-photon absorption (ETPA) rate with the photon-pair rate and estimates the concentration-dependent ETPA cross section for Rhodamine 6G. It also investigates the signature of energy-time entanglement and polarization dependence in the ETPA fluorescence rate, showing a strong dependence of the signal on the interphoton delay.
Article
Quantum Science & Technology
Max F. Riedel, Daniele Binosi, Rob Thew, Tommaso Calarco
QUANTUM SCIENCE AND TECHNOLOGY
(2017)
Article
Quantum Science & Technology
F. Monteiro, E. Verbanis, V. Caprara Vivoli, A. Martin, N. Gisin, H. Zbinden, R. T. Thew
QUANTUM SCIENCE AND TECHNOLOGY
(2017)
Article
Optics
Denis Rosset, Anthony Martin, Ephanielle Verbanis, Charles Ci Wen Lim, Rob Thew
