Article
Optics
Remi Vicente, Giovanni Cittadino, Alberto Di Lieto, Mauro Tonelli, Arnaud Gardelein, Gilles Nogues
Summary: This study presents a novel optical cooling technique that successfully cools a Yb:LiYF4 crystal to 125K and connects it to a laser source via an optical fiber. The proposed configuration is more practical for spaceborne cryogenics setups and meets the temperature requirements of experimental setups on small and medium satellites.
Article
Physics, Applied
Yongqing Lei, Biao Zhong, Tao Yang, Xuelu Duan, Meng Xia, Chaoyu Wang, Jiajin Xu, Ziheng Zhang, Jingxin Ding, Jianping Yin
Summary: This study reports the laser cooling of Yb3+-doped LuLiF4 crystal to cryogenic temperatures, reaching as low as 121K. The results indicate a promising cooling limit of 59K. This work opens up opportunities for cryogenic coolers and radiation-balanced lasers in miniaturized systems.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Ziyu Yang, Jun-Yi Ge, Shuangchen Ruan, Hongzhi Cui, Yu-Jia Zeng
Summary: The study reveals that the distorted double-perovskite Gd2ZnTiO6 shows promising magnetocaloric properties as a potential refrigerant material for the liquefaction of helium, with significant magnetic entropy change and cooling power compared to traditional refrigerants.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Multidisciplinary Sciences
A. Zelenakova, P. Hrubovcak, A. Berkutova, O. Sofranko, N. Kucerka, O. Ivankov, A. Kuklin, V Girman, V Zelenak
Summary: The structural and magnetocaloric properties of advanced nanocomposites consisting of Gd2O3 nanoparticles embedded into periodic porous SiO2 matrix have been investigated. Regular nanopores organized in a cubic or hexagonal superlattice were observed, with the pores being occupied by progressively concentrated nanoparticles. All tested systems exhibited remarkably high magnetic entropy change values at low temperatures, making them potential candidates for cryogenic refrigeration. Scaling analysis was applied to analyze the magnetic entropy change data, allowing conclusions on magnetic properties and phase transition type even under unavailable laboratory conditions.
SCIENTIFIC REPORTS
(2022)
Article
Nanoscience & Nanotechnology
Xin Tang, Jiawei Lai, H. Sepehri-Amin, T. Ohkubo, K. Hono
Summary: The study found that Pr-Fe-B and (Pr0.75Ce0.25)-Fe-B based hot-deformed magnets exhibit high magnetic performance at low temperatures, including large remanence and high coercivity, making them suitable as low-cost permanent magnet materials for cryogenic applications.
SCRIPTA MATERIALIA
(2021)
Article
Chemistry, Physical
Charlene Delacotte, Tatiana A. Pomelova, Thomas Stephant, Thierry Guizouarn, Stephane Cordier, Nikolay G. Naumov, Pierric Lemoine
Summary: This study reports on the magnetocaloric properties of the AGdS(2) family and finds that NaGdS2 exhibits the best performance. The layered structure of NaGdS2 significantly improves the magnetocaloric properties compared to LiGdS2. These magnetocaloric figures of merit highlight the promising potential of Gd-based sulfides as magnetic refrigeration materials.
CHEMISTRY OF MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Jiawei Lai, A. Bolyachkin, N. Terada, S. Dieb, Xin Tang, T. Ohkubo, H. Sepehri-Amin, K. Hono
Summary: Fe2P-type compounds exhibit a giant magnetocaloric effect and are studied for room temperature applications. In this study, rare-earth-free compounds with cryogenic magnetocaloric effect were optimized using data mining and machine learning, demonstrating promising magnetocaloric performance.
Article
Chemistry, Applied
A. Eloua, S. Derkaoui, R. Moubah, A. Tizliouine, A. Charkaoui, H. Lassri
Summary: In this study, the magnetocaloric effect of commercial Er2O3 powders was investigated, showing promising potential as a magnetic refrigerant at low temperatures due to its large magnetic entropy change and refrigerant capacity. The material exhibits significant adiabatic temperature change under magnetic field variations, making it a candidate for efficient cooling applications.
JOURNAL OF RARE EARTHS
(2021)
Article
Chemistry, Multidisciplinary
Elisa Ortiz-Rivero, Katarzyna Prorok, Inocencio Rafael Martin, Radoslaw Lisiecki, Patricia Haro-Gonzalez, Artur Bednarkiewicz, Daniel Jaque
Summary: Thermal control of liquids with high spatial resolution is crucial for single molecule/cell studies and advanced microfluidic devices. While remote heating of liquids is easily achieved using laser beams, localized cooling is much more challenging. This study demonstrates remote cooling in D2O using ytterbium-doped NaYF4 microparticles and mechanical thermometry, achieving liquid refrigeration below ambient conditions by over -6 K.
Article
Thermodynamics
D. Aghazadeh Dokandari, R. Haghighi Khoshkhoo, M. Bidi, Mostafa Mafi
Summary: This study introduced two novel combined power-refrigeration cycles to optimize the utilization of liquefied natural gas (LNG) cryogenic energy and reduce exergy destruction. By analyzing design parameters and performing optimization, the cycles showed improved energy efficiency, exergy efficiency, and refrigeration increasing ratio compared to direct LNG evaporation. The maximum obtainable cooling energy ratios in the cycles I and II were 62.6% and 73.9%, respectively.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2021)
Article
Chemistry, Multidisciplinary
Azzurra Volpi, Karl W. Kraemer, Daniel Biner, Brenden Wiggins, Jackson Kock, Alexander R. Albrecht, Eric J. Peterson, Michael N. Spilde, Mansoor Sheik-Bahae, Markus P. Hehlen
Summary: The study reports the first demonstration of solid-state laser cooling in fluoride crystals grown by the Bridgman method. Advances in crystal growth, thermal gradient simulations, and efficiency measurements confirm that solid-state laser cooling is achievable in materials with extremely high chemical purity and crystal quality.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Thermodynamics
Haoran Gan, Hanwei Zhang, Song Fang, Qasir Iqbal, Yubo Yao, Zhuoren Xu, Xiaoqin Zhi, Limin Qiu, Kai Wang
Summary: This study proposes two waste heat recovery systems based on different thermally driven refrigeration cycles for compression heat recovery, and compares their energetic, exergy, and economic potential. The results indicate that the organic Rankine vapor compression-based air compression system (ORVC-ACS) is superior to the absorption refrigeration-based air compression system (ARS-ACS) in terms of energy-saving and economic performance. The optimization results show that the ORVC-ACS is capable of saving approximately 8.52 GWh/year of electricity.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2023)
Article
Physics, Applied
Sagnik Banerjee, Aniket Singha
Summary: In this paper, we investigate a quadruple quantum dot setup for sensing the temperature of an electrically isolated remote target reservoir. The setup demonstrates superior temperature sensitivity and noise robustness compared to a simple thermometer consisting of two Coulomb-coupled quantum dots, making it suitable for constructing highly efficient non-local cryogenic thermometers. The performance and optimal configuration for the thermometer are also discussed in detail.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Zhipan Ma, Peng Xu, Xing Wang, Zhenqian Zhang, Lingwei Li
Summary: In this study, three rare earth-based quaternary silicon carbides were synthesized and characterized for their crystal structure, magnetic properties, magnetic phase transition, and magnetocaloric performances. Among them, GdCr2Si2C showed promising magnetocaloric performances for cryogenic magnetic refrigeration applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Optics
Francesco Caminati, Giovanni Cittadino, Eugenio Damiano, Alberto Di Lieto, Mauro Tonelli
Summary: This paper investigates two loss mechanisms that can hinder the optical refrigeration performance of a Yb:YLF monocrystal: the presence of impurities and fluorescence reabsorption. Experimental results show that impurities and a few ppm of other rare earth ions can have detrimental effects on optical refrigeration. The study also demonstrates the negative effect of fluorescence reabsorption on cooling performance.
Article
Chemistry, Multidisciplinary
F. Werschler, B. Lindner, C. Hinz, F. Conradt, P. Gumbsheimer, Y. Behovits, C. Negele, T. de Roo, O. Tzang, S. Mecking, A. Leitenstorfer, D. V. Seletskiy
Article
Physics, Multidisciplinary
T. L. M. Guedes, M. Kizmann, D. V. Seletskiy, A. Leitenstorfer, Guido Burkard, A. S. Moskalenko
PHYSICAL REVIEW LETTERS
(2019)
Article
Physics, Multidisciplinary
A. Liehl, P. Sulzer, D. Fehrenbacher, T. Rybka, D. Seletskiy, A. Leitenstorfer
PHYSICAL REVIEW LETTERS
(2019)
Article
Physics, Multidisciplinary
Matthias Kizmann, Thiago Lucena de M. Guedes, Denis Seletskiy, Andrey S. Moskalenko, Alfred Leitenstorfer, Guido Burkard
Article
Instruments & Instrumentation
C. Traum, P. Henzler, S. Lohner, H. Becker, D. Nabben, P. Gumbsheimer, C. Hinz, J. F. Lippmann, S. Mahapatra, K. Brunner, D. V. Seletskiy, A. Leitenstorfer
REVIEW OF SCIENTIFIC INSTRUMENTS
(2019)
Article
Optics
Philipp Sulzer, Cornelius Beckh, Andreas Liehl, Jeldrik Huster, Kilian R. Keller, Moritz Cimander, Philipp Henzler, Christian Traum, Claudius Riek, Denis Seletskiy, Alfred Leitenstorfer
Article
Physics, Applied
Pascal Gumbsheimer, Frieder Conradt, Yannic Behovits, Steffen Huber, Christopher Hinz, Carla Negele, Stefan Mecking, Denis Seletskiy, Alfred Leitenstorfer
Summary: The robust algorithm based on cross-correlations and lucky imaging can reliably correct spectrally diffused datasets, enabling detailed analysis of semiconductor quantum dots' emission fine structure. It allows for resolving bright and dark excitonic transitions with optimum signal-to-noise ratio and precise determination of linear polarization angles, providing a tool for accurate computation of the azimuth and polar angle of the QDs. This method offers a non-invasive and precise characterization of QD fine structure and orientation, valuable for efficient coupling of quantum emitters to the electromagnetic field using nano- and micro-optic strategies.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Physics, Multidisciplinary
P. Henzler, C. Traum, M. Holtkemper, D. Nabben, M. Erbe, D. E. Reiter, T. Kuhn, S. Mahapatra, K. Brunner, D. Seletskiy, A. Leitenstorfer
Summary: The study examines ultrafast transmission changes around the fundamental trion resonance in a negatively charged II-VI quantum dot after exciting a p-shell exciton. The biexcitonic induced absorption reveals quantum beats between hot-trion states at 133 GHz. The relaxation of the P-shell hole within 390 fs dominates interband dephasing, while trionic coherence remains stored in the spin system for 85 ps due to Pauli blocking of the triplet electron.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
Jyothis Thomas, Lauro J. Q. Maia, Kummara Venkata Krishnaiah, Yannick Ledemi, Jean-Sebastien Boisvert, Antsar Hlil, Denis Seletskiy, Younes Messaddeq, Raman Kashyap
Summary: The study investigated the potential of oxyfluoride glass-ceramics with different rare earth ion concentrations for optical refrigeration applications, finding that the highest intensity of anti-Stokes emission occurred in samples containing 1.5 mol % or 2.0 mol % Yb3+.
JOURNAL OF LUMINESCENCE
(2021)
Article
Physics, Multidisciplinary
Stephane Virally, Patrick Cusson, Denis V. Seletskiy
Summary: By using bright photon-number entangled twin beams for quantum-enhanced EOS, it is possible to improve the signal-to-noise ratio in the case of quantum vacuum and extract higher-order moments of the quantum noise distribution. These improvements pave the way for robust tomography of quantum fields in space-time.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
P. Sulzer, K. Oguchi, J. Huster, M. Kizmann, T. L. M. Guedes, A. Liehl, C. Beckh, A. S. Moskalenko, G. Burkard, D. Seletskiy, A. Leitenstorfer
Article
Optics
A. Liehl, P. Sulzer, D. Fehrenbacher, S. Eggert, M. Ludwig, F. Ritzkowsky, D. Seletskiy, A. Leitenstorfer
Proceedings Paper
Engineering, Electrical & Electronic
Andreas Liehl, Philipp Sulzer, David Fehrenbacher, Denis V. Seletskiy, Alfred Leitenstorfer
2019 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2019)
Proceedings Paper
Engineering, Electrical & Electronic
Jan F. Lippmann, Alfred Leitenstorfer, Denis V. Seletskiy
2019 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2019)
Article
Materials Science, Multidisciplinary
C. Hinz, P. Gumbsheimer, C. Traum, M. Holtkemper, B. Bauer, J. Haase, S. Mahapatra, A. Frey, K. Brunner, D. E. Reiter, T. Kuhn, D. V. Seletskiy, A. Leitenstorfer
