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optical storage of circular airy beam in atomic vapor

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Chinese Physics B 2024年第8期33卷 263-269页

作者：常虹杨欣马燕杨鑫琪曹明涛张晓斐董瑞芳张首刚 Key Laboratory of Time Reference and Applications National Time Service CenterChinese Academy of SciencesXi'an 710600China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic DevicesSchool of PhysicsXi'an Jiaotong UniversityXi'an 710049China Department of Physics Shaanxi University of Science and TechnologyXi'an 710021China Hefei National Laboratory Hefei 230088China

The realization of quantum storage of spatial light field is of great significance to the construction of high-dimensional quantum *** this paper,we experimentally realize the storage and retrieval of circular Airy beams(CABs)by using theΛ-type three-level energy system based on the electromagnetically induced transparency in a hot rubidium atomic vapor *** weak probe beam field is modulated with phase distribution of CABs by a spatial light *** store the probe circular Airy beam(CAB)into the rubidium atomic vapor cell and retrieve it after the demanded *** quantitatively analyze the storage results and give corresponding theoretical ***,we investigate the autofocusing and self-healing effect of the retrieved CAB,which indicates that the properties and beam shape of CAB maintain well after *** work will have potential applications in the storage of high-dimensional quantum information,and is also useful for improving the channel capacities of quantum internet.

关键词： circular Airy beam optical storage autofocusing effect self-healing effect

Photostimulated Luminescence and optical storage in Eu ^(2+)-Doped Fluoride-Oxide Glass Ceramics

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Journal of Rare Earths 2005年第S1期23卷 175-177页

作者：王欣姿王永生孙力王婷婷 Institute of Optoelectronic Technology Beijing Jiaotong University Key Laboratory of Materials for Information Storage and Display Ministry of Railway Beijing 100044 China

Photostimulated luminescence (PSL) phenomenon was observed in a fluoride-oxide glass ceramics doped with Eu 2+. When the UV light irradiated glass ceramic was stimulated by a longer wavelength light, PSL at 447 nm due to the 5d-4f transition of Eu 2+ was observed. The PSl excitation band peaking at 543 nm is due to the electron trap centers which are located either in the Eu 2+-doped crystallites or in the glass; where exactly they are located in is not yet known. The optical storage properties of this kind of glass ceramic were also studied. By comparing with the investigations on PSL phosphor Eu 2+ doped alkali halides, PSL mechanism in glass ceramics which is still an open question and has to be investigated in further experiments was explained.

关键词： Photostimulated luminescence optical storage fluoride-oxide glass ceramics electron trapping materials

The role of Sm ions in optical storage of SrS: Eu,Sm

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Science China Mathematics 2001年第9期44卷 1189-1196页

作者：何志毅王永生孙力侯延冰徐叙■ Institute of Optoelectronic Technology Northern Jiaotong University Beijing China

The optical absorption spectra of infrared stimulable phosphor SrS:Eu, Sm in the saturat-ed and bleached states of optical storage were investigated. The valence and number of Sm3+ ions were examined via the Sm3+ 4f-4f absorption in near-infrared region. It was found that the broad band absorption corresponding to the transition for electrons stimulated from the traps to the conduction band is decreased at the wavelengths of Sm3+ absorption lines. The dependence of optical storage on Sm concentration was measured. A new trapping mechanism in SrS: Eu, Sm was presented based on our experimental results and the role of Sm ions was identified.

关键词： electron capturing electron trap optical storage samarium.

NIR regeneration and visible luminescence modification in photochromic glass:A novel encryption and 3D optical storage medium

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InfoMat 2024年第9期6卷 123-134页

作者： Heping Zhao Yuewei Li Chao Mi Yingzhu Zi Xue Bai Asif Ali Haider Yangke Cun Anjun Huang Yue Liu Jianbei Qiu Zhiguo Song Jiayan Liao Ji Zhou Zhengwen Yang College of Materials Science and Engineering Kunming University of Science and TechnologyKunmingPeople's Republic of China Southwest United Graduate School KunmingPeople's Republic of China Institute for Biomedical Materials and Devices(IBMD) Faculty of ScienceUniversity of Technology SydneySydneyNew South WalesAustralia State Key Lab of New Ceramics and Fine Processing Department of Materials Science and EngineeringTsinghua UniversityBeijingPeople's Republic of China

Photochromic glass shows great promise for 3D optical information encryption and storage *** formation of Ag nanoclusters by light irradiation has been a significant development in the field of photochromic glass ***,extending this approach to other metal nanoclusters remains a *** this study,we present a pioneering method for crafting photochromic glass with reliably adjustable dual-mode luminescence in both the NIR and visible *** was achieved by leveraging bimetallic clusters of bismuth,resulting in a distinct and novel photochromic *** rare-earth-doped,bismuth-based glass is irradiated with a 473 nm laser,and it undergoes a color transformation from yellow to red,accompanied by visible and broad NIR *** phenomenon is attributed to the formation of laserinduced(Bi^(+),Bi^(0))*** achieved reversible manipulation of the NIR luminescence of these nanoclusters and visible rare-earth luminescence by alternating exposure to a 473 nm laser and thermal *** patterns can be inscribed and erased on a glass surface or in 3D space,and the readout is enabled by modulating visible and NIR *** study introduces a pioneering strategy for designing photochromic glasses with extensive NIR luminescence and significant potential for applications in highcapacity information encryption,optical data storage,optical communication,and NIR *** exploration of bimetallic cluster formation in Bi represents a vital contribution to the advancement of multifunctional glass systems with augmented optical functionalities and versatile applications.

关键词： optical storage photochromic glass reproducible NIR luminescence

optical storage： an emerging option in long-term digital preservation

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Frontiers of Optoelectronics 2014年第4期7卷 486-492页

作者： Shenggang WAN Qiang CAO Changsheng XIE Wuhan National Laboratory for Optoelectronics Wuhan 430074 China School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

Long-term digital preservation is an important issue in data storage area. For years, magnetic media based solutions, such as tape and hard disk drive （HDD） based archive systems, monopolize the data archiving market due to their high capacity and low cost. However, in the era of big data, rapidly increasing volume, velocity, and variety of data set bring numerous challenges to the archive systems in various aspects, such as capacity, cost, performance, reliability, power consumption, and so on. In recent years, high capacity optical media, such as bluray discs （BDs） and holographic discs, emerge with the revival of optical storage. Due to the natural simple construction of the optical media, the archive systems based on those optical media, e.g., BD library, demonstrate attractive properties, such as cost per bit, reliability, power consumption, and so on, thus become feasible options in long-term digital preservation. In this paper, we reviewed and compared both the magnetic and optical media based solutions for long-term digital preservation, followed by a summarization on techniques to improve the optical media based archive system.

关键词： blu-ray disc (BD) long-term digital preservation optical storage

Up-conversion and optical storage properties of SrS: Eu, Sm in PMMA

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Chinese Journal of Lasers 1993年第1期 69-71页

作者： Shuchun Chen, Changhong Qi, Fengmei Dai, Fuxi Gan(Shanghai Institute of Optics & Fine Mechanics, Academia Sinica,P. O. Box 800-216,Shanghai 201800,China)

An erasable and rewritable optical-storage material SrS: Eu,Sm synthesized. optical emission and excitation spectra of this material were measured. Using the SrS: Eu, Sm-PMMA film, the image-recording experiment was p... 详细信息

关键词： SrS : Eu Sm Up-conversion optical storage

Complex amplitude distribution for compensation of refractive index mismatch on 3D optical storage recording system

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Journal of Shanghai University(English Edition) 2006年第3期10卷 219-223页

作者：陈建农于永江 Daniel Day Department of Physics Yantai Ludong University Yantai 264025 P.R. China Center for Micro-Photonivs Hawthorn VIC 3122 Australia

The complex amplitude distribution which can compensate for the spherical aberration caused by mismatch on lnterthce between recording material and immersion material （air） on three-dimensional optical storage system is derived analytically and numerically. Comparison between two approaches is made. It is also shown how the depth of recording layer and position of reference plane are related to the phase distribution at reference plane and how the mismatch can be resolved by using a pure phase element.

关键词： optical storage spherical aberration pure phase plate refractive index mismatch.

Luminescence studies of MBrCl:Eu^(2+) (M=Ca,Sr,Ba)

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Journal of Rare Earths 2009年第2期27卷 316-319页

作者：孟宪国王永生何大伟 Institute of Optoelectronic Technology Ministry of RailwayKey Lab Laboratory of Materials for Information Storage and DisplayBeijing Jiaotong UniversityBeijing 100044China

Europium doped MBrCl （M=Ca, Sr, and Ba） phosphors were prepared by solid state reaction in reductive atmosphere. Photolu- minescence （PL）, photostimulated luminescence （PSL） after X-ray irradiation and optical absorption studies of MBrCI：Eu2＋（M=Ca, Sr, and Ba） revealed that：（1） blue light emission, under the excitation of 300 nm, was observed in all these phosphors; （2） the shape of the emission spectra in CaBrCI：Eu2＋ could be changed by varying the bromine/chlorine ratio during synthesis, while that in SrBrCI：Eu2＋ and BaBrCI：Eu2＋ showed no change; and （3） PSL was observed in SrBrCI：Eu2＋ and BaBrCI：Eu2＋ after X-ray irradiation. Difference absorption spectrum （DAS） in SrBrCl：Eu2＋showed two broad bands centered at about 470 and 570 nm, and DAS in BaBrCl：Eu2＋showed two bands at about 550 and 675 nm, respectively. This enabled the use of He-Ne laser （633 nm） or even semiconductor fight-emitting diodes （LED） instead of gas lasers for photostimulation.

关键词： photostimulated luminescence optical storage rare earths

Read—out of a read—only super—resolution optical disc with a Si mask

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Chinese Physics B 2002年第10期11卷 1073-1075页

作者：魏劲松阮昊等 ShanghaiInstituteofOpticsandFIneMechanics ChineseAcademyofSciencesShanghai201800China

A novel read-only super-resolution optical disc structure (substrate/mask layer/dielectric layer) is proposed in this paper. By using a Si thin film as the mask layer, the recording pits with a diameter 380nm and a depth 50nm are read out on the dynamic measuring equipment; the laser wavelength λ is 632.8nm and the numerical aperture is 0.40. In the course of reproduction, the laser power is 5mW and the rotation velocity of the disc is 4m.s-1. The optimum thickness of the Si thin film is 18nm and the signal-to-noise ratio is 32dB.

关键词： super-resolution optical storage Si thin film