Results 11 to 20 of about 37,943 (215)
Optomechanical cooling and self-stabilization of a waveguide coupled to a whispering-gallery-mode resonator [PDF]
Photonics Research, 2020 Laser cooling of mechanical degrees of freedom is one of the most significant achievements in the field of optomechanics. Here, we report, for the first time to the best of our knowledge, efficient passive optomechanical cooling of the motion of a freestanding waveguide coupled to a whispering-gallery-mode (WGM) resonator. The waveguide is an 8 mm long
Riccardo Pennetta +4 more
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Simultaneous cooling of coupled mechanical oscillators using whispering gallery mode resonances
Optics Express, 2016 We demonstrate simultaneous center-of-mass cooling of two coupled oscillators, consisting of a microsphere-cantilever and a tapered optical fiber. Excitation of a whispering gallery mode (WGM) of the microsphere, via the evanescent field of the taper, provides a transduction signal that continuously monitors the relative motion between these two ...
Li, Ying Lia +2 more
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Case Studies in Thermal EngineeringTo characterize the oscillating flow and heat transfer characteristics of the cooling gallery inside a steel piston, a visual experimental platform was designed and constructed.
Yang Liu +5 more
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Buildings, 2023 Determining the input parameters for the calibration of a water mist extinguishing system in a compartment is important for the evaluation of the performance of the design.
Davide Berardi +2 more
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Optomechanical Transduction and Characterization of a Silica Microsphere Pendulum via Evanescent Light [PDF]
, 2015 Dissipative optomechanics has some advantages in cooling compared to the conventional dispersion dominated systems. Here, we study the optical response of a cantilever-like, silica, microsphere pendulum, evanescently coupled to a fiber taper.
Chormaic, Síle Nic +4 more
core +2 more sources
Nano Materials Science, 2023 Yellow light-emitting diodes (LEDs) as soft light have attracted abundant attention in lithography room, museum and art gallery. However, the development of efficient yellow LEDs lags behind green and blue LEDs, and the available perovskites yellow LEDs ...
Baiqian Wang +8 more
doaj +1 more source
Fire, 2022 In this study, an underground pipe gallery was taken as the research subject to explore the influence of nitrogen injection flow rate and pipe diameter on the fire extinguishing efficiency in an underground narrow confined space.
Guowei Zhang +4 more
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Spin bath maser in a cryogenically cooled sapphire whispering gallery mode resonator [PDF]
Physical Review B, 2013 We report the observation of a mechanism of maser generation in an ensemble of inter-coupled, inhomogeneously broadened two-level systems, enhanced by high quality factor electromagnetic cavity modes. In this previously unobserved form of population inversion, an inseparable quantum system leads to cavity-enhanced stimulated emission arising from ...
Bourhill, J. +5 more
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Case Studies in Thermal Engineering, 2023 To further improve the thermal state of the piston for better thermal design, a multi-objective optimisation algorithm was used in this paper to find the best combination of design variables.
Yang Liu +5 more
doaj +1 more source
Effect of flow in the circular 90-degree curved nozzles on ejecting oil jet behavior
Journal of Fluid Science and Technology, 2021 In general, technical methods for improving the thermal efficiency of an engine increase the heat load on peripheral components. Recently, a piston cooling gallery equipped with a flow path has been developed.
Mikimasa KAWAGUCHI +7 more
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