The Experts below are selected from a list of 15663 Experts worldwide ranked by ideXlab platform
Uriel Levy - One of the best experts on this subject based on the ideXlab platform.
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Demonstration of Sub-Micron Hot Vapor Cells for Quantum Technology Applications
Conference on Lasers and Electro-Optics, 2020Co-Authors: Eliran Talker, Roy Zektzer, Noa Mazurski, Yefim Barash, Uriel LevyAbstract:We report on the fabrication of a glass Vapor cell with a scalable thickness varying from 50 nm to 30 μm. It is used to demonstrate atomic based laser stabilization at 780 nm wavelength.
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chiral light matter interactions in Hot Vapor cladded waveguides
Optica, 2019Co-Authors: Roy Zektzer, Noa Mazurski, Eliran Talker, Yefim Barash, Uriel LevyAbstract:Recently, there has been growing interest in integrating alkali Vapors with nanoscale pHotonic structures, such as nanowaveguides, resonators, and nanoantennas. Nanoscale confinement of electromagnetic fields may introduce a longitudinal electric field component, giving rise to circularly polarized modes that are essential for diverse applications involving Vapor and light, such as chirality and nonreciprocity. Hereby, we have designed, fabricated, and characterized a miniaturized Vapor cell that is integrated with optical waveguides that are designed to generate a peculiar circular-like polarization. Taking advantage of this phenomenon, we demonstrate a spectral shift in the atomic absorption signatures at varying magnetic fields, and significant isolation between forward- and backward-propagating waves in our atomic-cladded waveguide. Our results pave the way for the utilization of chip-scale integrated atomic devices in applications such as optical isolation and high spatial resolution magnetometry.
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Chiral light–matter interactions in Hot Vapor-cladded waveguides
Optica, 2018Co-Authors: Roy Zektzer, Noa Mazurski, Eliran Talker, Yefim Barash, Uriel LevyAbstract:Recently, there has been growing interest in integrating alkali Vapors with nanoscale pHotonic structures, such as nanowaveguides, resonators, and nanoantennas. Nanoscale confinement of electromagnetic fields may introduce a longitudinal electric field component, giving rise to circularly polarized modes that are essential for diverse applications involving Vapor and light, such as chirality and nonreciprocity. Hereby, we have designed, fabricated, and characterized a miniaturized Vapor cell that is integrated with optical waveguides that are designed to generate a peculiar circular-like polarization. Taking advantage of this phenomenon, we demonstrate a spectral shift in the atomic absorption signatures at varying magnetic fields, and significant isolation between forward- and backward-propagating waves in our atomic-cladded waveguide. Our results pave the way for the utilization of chip-scale integrated atomic devices in applications such as optical isolation and high spatial resolution magnetometry.
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Chiral quantum optics in Hot Vapor cladded waveguide
Conference on Lasers and Electro-Optics, 2018Co-Authors: Roy Zektzer, Noa Mazurski, Eliran Talker, Yefim Barash, Uriel LevyAbstract:We demonstrate a strong magneto optic effect in chip scale integrated atomic cladded waveguides. Chiral effects and non-reciprocity of the integrated waveguide-atomic Vapor system is observed. Possible applications such as isolators are discussed.
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Light matter interactions in a hybrid nanopHotonic-atomic platform
2015 International Conference on Optical MEMS and Nanophotonics (OMN), 2015Co-Authors: Liron Stern, Meir Grajower, Boris Desiatov, Roy Zektzer, Alex Naiman, Noa Mazurski, Uriel LevyAbstract:We demonstrate variety of light matter interactions in our nanopHotonic-atomic hybrid system, considering both plasmonic and guided mode interaction with Hot Vapor.
Roy Zektzer - One of the best experts on this subject based on the ideXlab platform.
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Demonstration of Sub-Micron Hot Vapor Cells for Quantum Technology Applications
Conference on Lasers and Electro-Optics, 2020Co-Authors: Eliran Talker, Roy Zektzer, Noa Mazurski, Yefim Barash, Uriel LevyAbstract:We report on the fabrication of a glass Vapor cell with a scalable thickness varying from 50 nm to 30 μm. It is used to demonstrate atomic based laser stabilization at 780 nm wavelength.
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chiral light matter interactions in Hot Vapor cladded waveguides
Optica, 2019Co-Authors: Roy Zektzer, Noa Mazurski, Eliran Talker, Yefim Barash, Uriel LevyAbstract:Recently, there has been growing interest in integrating alkali Vapors with nanoscale pHotonic structures, such as nanowaveguides, resonators, and nanoantennas. Nanoscale confinement of electromagnetic fields may introduce a longitudinal electric field component, giving rise to circularly polarized modes that are essential for diverse applications involving Vapor and light, such as chirality and nonreciprocity. Hereby, we have designed, fabricated, and characterized a miniaturized Vapor cell that is integrated with optical waveguides that are designed to generate a peculiar circular-like polarization. Taking advantage of this phenomenon, we demonstrate a spectral shift in the atomic absorption signatures at varying magnetic fields, and significant isolation between forward- and backward-propagating waves in our atomic-cladded waveguide. Our results pave the way for the utilization of chip-scale integrated atomic devices in applications such as optical isolation and high spatial resolution magnetometry.
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Chiral light–matter interactions in Hot Vapor-cladded waveguides
Optica, 2018Co-Authors: Roy Zektzer, Noa Mazurski, Eliran Talker, Yefim Barash, Uriel LevyAbstract:Recently, there has been growing interest in integrating alkali Vapors with nanoscale pHotonic structures, such as nanowaveguides, resonators, and nanoantennas. Nanoscale confinement of electromagnetic fields may introduce a longitudinal electric field component, giving rise to circularly polarized modes that are essential for diverse applications involving Vapor and light, such as chirality and nonreciprocity. Hereby, we have designed, fabricated, and characterized a miniaturized Vapor cell that is integrated with optical waveguides that are designed to generate a peculiar circular-like polarization. Taking advantage of this phenomenon, we demonstrate a spectral shift in the atomic absorption signatures at varying magnetic fields, and significant isolation between forward- and backward-propagating waves in our atomic-cladded waveguide. Our results pave the way for the utilization of chip-scale integrated atomic devices in applications such as optical isolation and high spatial resolution magnetometry.
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Chiral quantum optics in Hot Vapor cladded waveguide
Conference on Lasers and Electro-Optics, 2018Co-Authors: Roy Zektzer, Noa Mazurski, Eliran Talker, Yefim Barash, Uriel LevyAbstract:We demonstrate a strong magneto optic effect in chip scale integrated atomic cladded waveguides. Chiral effects and non-reciprocity of the integrated waveguide-atomic Vapor system is observed. Possible applications such as isolators are discussed.
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Light matter interactions in a hybrid nanopHotonic-atomic platform
2015 International Conference on Optical MEMS and Nanophotonics (OMN), 2015Co-Authors: Liron Stern, Meir Grajower, Boris Desiatov, Roy Zektzer, Alex Naiman, Noa Mazurski, Uriel LevyAbstract:We demonstrate variety of light matter interactions in our nanopHotonic-atomic hybrid system, considering both plasmonic and guided mode interaction with Hot Vapor.
Nir Davidson - One of the best experts on this subject based on the ideXlab platform.
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Transverse drag of slow light in moving atomic Vapor
Optics letters, 2020Co-Authors: Yakov Solomons, Chitram Banerjee, Slava Smartsev, Jonathan E. Friedman, D. Eger, Ofer Firstenberg, Nir DavidsonAbstract:The Fresnel-Fizeau effect of transverse drag, in which the trajectory of a light beam changes due to the transverse motion of the optical medium, is usually extremely small and hard to detect. We observe transverse drag in a moving Hot-Vapor cell, utilizing slow light due to electromagnetically induced transparency (EIT). The drag effect is enhanced by a factor 3.6×105, corresponding to the ratio between the light speed in vacuum and the group velocity under EIT conditions. We study the contribution of the thermal atomic motion, which is much faster than the mean medium velocity, and identify the regime where its effect on the transverse drag is negligible.
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Angular dependence of Dicke-narrowed electromagnetically induced transparency resonances
Physical Review A, 2007Co-Authors: Moshe Shuker, Ofer Firstenberg, Rami Pugatch, A. Ben-kish, Arza Ron, Nir DavidsonAbstract:Dicke narrowing is a phenomenon that dramatically reduces the Doppler width of spectral lines, due to frequent velocity-changing collisions. A similar phenomenon occurs for electromagnetically induced transparency (EIT) resonances, and facilitates ultranarrow spectral features in room-temperature Vapor. We directly measure the Dicke-like narrowing by studying EIT line shapes as a function of the angle between the pump and probe beams. The measurements are in good agreement with an analytic theory with no fit parameters. The results show that Dicke narrowing can increase substantially the tolerance of Hot-Vapor EIT to angular deviations. We demonstrate the importance of this effect for applications such as imaging and spatial solitons using a single-sHot imaging experiment, and discuss the implications for the feasibility of storing images in atomic Vapor.
Ronghou Liu - One of the best experts on this subject based on the ideXlab platform.
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influence of industrial alcohol and additive combination on the physicochemical characteristics of bio oil from fast pyrolysis of pine sawdust in a fluidized bed reactor with Hot Vapor filter
Journal of The Energy Institute, 2017Co-Authors: Yuanfei Mei, Ronghou Liu, Le ZhangAbstract:Abstract Effects of different mass fractions of industrial alcohol additive (10% and 20%) and additive combination (ethanol: 6.58%, acetonitrile: 1.00%, methyl acetate: 2.42%) on the physicochemical characteristics of pine sawdust bio-oil aging for three months by fast pyrolysis of 1–5 kg/h bench-scale fluidized bed reactor with Hot Vapor filter were investigated. The results indicated that addition of industrial alcohol and additive combination had a significant effect on improving the physicochemical characterization of bio-oil. The additives could significantly lower the viscosity and instantly increase pH value of the bio-oil remarkably and also delay the aging rates of the bio-oil. Results showed that compared with the blank (bio-oil without additive), the pH values of the bio-oils with 10% industrial alcohol (10% IA bio-oil), 20% industrial alcohol (20% IA bio-oil), and additive combination (AC bio-oil) were immediately increased by 12%, 12%, and 21%, respectively when the additives were added. After stored for 90 days, viscosities of crude bio-oil, 10% IA bio-oil, 20% IA bio-oil and AC bio-oil were increased by 200%, 54%, 69%, and 62%, respectively. Two-dimensional gas chromatography coupled with time-of-flight mass spectrometry (GC × GC-TOFMS) analysis indicated that the aged bio-oil after 90 days storage had a lower levels of phenols than that of the crude bio-oil and the contents of ketones and esters were increased. FT-IR analysis demonstrated that the structures of non-volatile residue of bio-oils were changed and polymerization occurred with other compounds such as alcohols and aldehydes during storage.
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effect of temperature of ceramic Hot Vapor filter in a fluidized bed reactor on chemical composition and structure of bio oil and reaction mechanism of pine sawdust fast pyrolysis
Fuel Processing Technology, 2017Co-Authors: Yuanfei Mei, Ronghou LiuAbstract:Abstract The chemical composition, structure of bio-oil and reaction mechanism of pine sawdust pyrolysis by fluidized-bed reactor at 500 °C with Hot Vapor filter (HVF) at temperatures of 350 °C, 400 °C, 450 °C and 500 °C were investigated. According to elemental and GPC analysis, the average formula of HVF bio-oils at HVF temperature 350 °C, 400 °C, 450 °C, 500 °C and non-HVF bio-oil were expressed as C 36.60 H 54.17 O 15.37 , C 17.11 H 25.50 O 9.07 , C 15.22 H 22.53 O 7.61 , C 15.80 H 22.43 O 8.37 and C 15.23 H 21.47 O 8.99 , respectively. Quantitative NMR result showed that the aromatic carbon fraction and the hydroxyl and alkyl carbons in carbohydrate fraction increased, but the C O bonds in phenolic-methoxy fraction and the methoxyl-aromatic fraction decreased with the increased HVF temperature. GC × GC-TOFMS analysis showed that the contents of phenols, aldehydes and alcohols in HVF bio-oils and non-HVF bio-oil had a similar increasing tendency. In contrast, ketones, furans and carbohydrates had a similar decreasing tendency. Tentative chemical transformation pathways showed that guaiacol-type compounds with side chains of two carbons or longer were decreased. The Ar OH bonds in catechol-type were more stable than the Ar OCH 3 bonds when HVF temperature was between 400 °C and 500 °C. Experimental results showed that Hot Vapor filter had a positive effect on the composition and structure of bio-oil, and more stable and higher quality bio-oil can be produced.
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Effect of Hot Vapor Filter Temperature on Mass Yield, Energy Balance, and Properties of Products of the Fast Pyrolysis of Pine Sawdust
Energy & Fuels, 2016Co-Authors: Yuanfei Mei, Ronghou Liu, Le ZhangAbstract:The fast pyrolysis in a fluidized-bed reactor using pine sawdust has been studied at 500 °C with ceramic Hot Vapor filter (HVF). The effects of HVF temperature (350, 400, 450, and 500 °C) on mass balance, energy balance, and physical properties of pyrolysis products were investigated. The results were reported that the maximum yields of bio-oil and organic liquid were 58.7 and 41.6 wt % at HVF temperatures of 350 and 400 °C, respectively. When HVF temperature increased from 350 °C to 500 °C, the maximum biochar yield was 25.3 wt % at 350 °C, while the minimum noncondensable gas (NCG) yield was 19.2 wt % at 400 °C. The energy consumption of pine sawdust pyrolysis was calculated as 2.38 MJ/kg. The optimized HVF temperature for energy balance was 450 °C. Under these conditions, the potentially recovered energy of bio-oil and total pyrolysis products reached maximum values of 7.49 MJ/kg and 17.91 MJ/kg, respectively. Maximum energy recovery ratios of total pyrolysis products and bio-oil were 0.92 and 0.39, re...
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Effect of Hot Vapor filtration on the characterization of bio-oil from rice husks with fast pyrolysis in a fluidized-bed reactor.
Bioresource technology, 2011Co-Authors: Tianju Chen, Ronghou Liu, Wenting Fei, Shiyu LiuAbstract:To produce high quality bio-oil from biomass using fast pyrolysis, rice husks were pyrolyzed in a 1-5 kg/h bench-scale fluidized-bed reactor. The effect of Hot Vapor filtration (HVF) was investigated to filter the solid particles and bio-char. The results showed that the total bio-oil yield decreased from 41.7% to 39.5% by weight and the bio-oil had a higher water content, higher pH, and lower alkali metal content when using HVF. One hundred and twelve different chemical compounds were detected by gas chromatography-mass spectrometry (GC-MS). The molecular weight of the chemical compounds from the condenser and the EP when the cyclone was coupled with HVF in the separation system decreased compared with those from the condenser and EP when only cyclone was used.
Eliran Talker - One of the best experts on this subject based on the ideXlab platform.
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Demonstration of Sub-Micron Hot Vapor Cells for Quantum Technology Applications
Conference on Lasers and Electro-Optics, 2020Co-Authors: Eliran Talker, Roy Zektzer, Noa Mazurski, Yefim Barash, Uriel LevyAbstract:We report on the fabrication of a glass Vapor cell with a scalable thickness varying from 50 nm to 30 μm. It is used to demonstrate atomic based laser stabilization at 780 nm wavelength.
-
chiral light matter interactions in Hot Vapor cladded waveguides
Optica, 2019Co-Authors: Roy Zektzer, Noa Mazurski, Eliran Talker, Yefim Barash, Uriel LevyAbstract:Recently, there has been growing interest in integrating alkali Vapors with nanoscale pHotonic structures, such as nanowaveguides, resonators, and nanoantennas. Nanoscale confinement of electromagnetic fields may introduce a longitudinal electric field component, giving rise to circularly polarized modes that are essential for diverse applications involving Vapor and light, such as chirality and nonreciprocity. Hereby, we have designed, fabricated, and characterized a miniaturized Vapor cell that is integrated with optical waveguides that are designed to generate a peculiar circular-like polarization. Taking advantage of this phenomenon, we demonstrate a spectral shift in the atomic absorption signatures at varying magnetic fields, and significant isolation between forward- and backward-propagating waves in our atomic-cladded waveguide. Our results pave the way for the utilization of chip-scale integrated atomic devices in applications such as optical isolation and high spatial resolution magnetometry.
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Chiral light–matter interactions in Hot Vapor-cladded waveguides
Optica, 2018Co-Authors: Roy Zektzer, Noa Mazurski, Eliran Talker, Yefim Barash, Uriel LevyAbstract:Recently, there has been growing interest in integrating alkali Vapors with nanoscale pHotonic structures, such as nanowaveguides, resonators, and nanoantennas. Nanoscale confinement of electromagnetic fields may introduce a longitudinal electric field component, giving rise to circularly polarized modes that are essential for diverse applications involving Vapor and light, such as chirality and nonreciprocity. Hereby, we have designed, fabricated, and characterized a miniaturized Vapor cell that is integrated with optical waveguides that are designed to generate a peculiar circular-like polarization. Taking advantage of this phenomenon, we demonstrate a spectral shift in the atomic absorption signatures at varying magnetic fields, and significant isolation between forward- and backward-propagating waves in our atomic-cladded waveguide. Our results pave the way for the utilization of chip-scale integrated atomic devices in applications such as optical isolation and high spatial resolution magnetometry.
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Chiral quantum optics in Hot Vapor cladded waveguide
Conference on Lasers and Electro-Optics, 2018Co-Authors: Roy Zektzer, Noa Mazurski, Eliran Talker, Yefim Barash, Uriel LevyAbstract:We demonstrate a strong magneto optic effect in chip scale integrated atomic cladded waveguides. Chiral effects and non-reciprocity of the integrated waveguide-atomic Vapor system is observed. Possible applications such as isolators are discussed.