Spectral Hole-Burning and Related Spectroscopies: Science and Applications最新文献_第8页

Spectral Hole Stability and Laser Induced Hole-Filling in Zinc-Tetrabenzoporphurin/Aromatic Cyanide System 锌-四苯并卟啉/芳香氰化物体系的光谱空穴稳定性及激光诱导的空穴填充

Spectral Hole-Burning and Related Spectroscopies: Science and Applications Pub Date : 1900-01-01 DOI: 10.1364/shbs.1994.wd21

Nie Yuxin, Zhao Lizeng, Wang Duoyuan, Hu Lingzhi

引用次数: 0

The role of divalent ions in persistent hole-burning mechanism in Y2O3:Pr3+ crystals 二价离子在Y2O3:Pr3+晶体中持续孔洞燃烧机制中的作用

Spectral Hole-Burning and Related Spectroscopies: Science and Applications Pub Date : 1900-01-01 DOI: 10.1364/shbs.1994.wd55

T. Okuno, Koichiro Tanaka, T. Suemoto

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Fluorescence excitation of impurities doping crystals and polymers using single molecule spectroscopy 用单分子光谱学研究杂质、掺杂晶体和聚合物的荧光激发

Spectral Hole-Burning and Related Spectroscopies: Science and Applications Pub Date : 1900-01-01 DOI: 10.1364/shbs.1994.wb1

J. Bernard, M. Orrit, R. Brown, B. Lounis

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Liquid Crystalline Materials for Photonics: Optical Switching by Means of Photochemical Phase Transition of Liquid-Crystalline Azobenzene Films 光子学用液晶材料:利用液晶偶氮苯薄膜的光化学相变进行光开关

Spectral Hole-Burning and Related Spectroscopies: Science and Applications Pub Date : 1900-01-01 DOI: 10.1364/shbs.1994.wd63

T. Ikeda, O. Tsutsumi

{"title":"Liquid Crystalline Materials for Photonics: Optical Switching by Means of Photochemical Phase Transition of Liquid-Crystalline Azobenzene Films","authors":"T. Ikeda, O. Tsutsumi","doi":"10.1364/shbs.1994.wd63","DOIUrl":"https://doi.org/10.1364/shbs.1994.wd63","url":null,"abstract":"Isothermal phase transition of liquid crystals (LCs) can be induced reversibly by photochemical reaction of guest molecules incorporated into the LC phase at concentrations of 1 ~ 5 mol%. Such photoresponsive molecules as azobenzene and spiropyran derivatives have been proved to be effective guest molecules to bring about the photochemical phase transition. 1-5 The mechanism of the photochemical phase transition is interpreted in terms of the change in the molecular shape of the guest molecules by the photochemical reaction. For example, trans-azobenzenes are rod-like shape, stabilizing the LC phase, while cis-azobenzenes are bent, destabilizing the LC phase. When the trans-azobenzene/nematic (N) LC mixtures are irradiated to cause trans-cis photoisomerization of the guest molecules, the LC phase of the mixtures is destabilized in accumulation of the cis form and the N to isotropic (I) phase transition temperature (tNI) is lowered. When tNI is lowered below the irradiation temperature, N-I phase transition of the guest/host mixture is induced isothermally. This process is reversible, and cis-trans back isomerization restores the initial N phase. Time-resolved measurements by the use of a pulsed laser have revealed that the photochemical N-I phase transition takes place in the time region of 50 ~ 200 ms for the nematic hosts of low-molecular-weight (LMW) as well as polymeric LCs.6,7 Propagation of perturbation in the form of the trans-cis isomerization of the guest molecules may require a relatively long time in the LC systems.","PeriodicalId":443330,"journal":{"name":"Spectral Hole-Burning and Related Spectroscopies: Science and Applications","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123995997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New Mechanisms and New Systems of Hole Formation in Spectral Hole Burning 光谱烧孔形成的新机制和新体系

Spectral Hole-Burning and Related Spectroscopies: Science and Applications Pub Date : 1900-01-01 DOI: 10.1364/shbs.1994.thf1

K. Horie

{"title":"New Mechanisms and New Systems of Hole Formation in Spectral Hole Burning","authors":"K. Horie","doi":"10.1364/shbs.1994.thf1","DOIUrl":"https://doi.org/10.1364/shbs.1994.thf1","url":null,"abstract":"A variety of studies on persistent spectral hole burning (PSHB) have been carried out for the last twenty years [1-4], since the discovery of this phenomenon in 1974. The elucidation of electron-phonon interaction, the nature of a zero-phonon line and spectral diffusion in PSHB have been studied intensively together with the research aiming at its possible applicability to ultra-high density optical storage. However, as for the PSHB materials, most of the works have been carried out with porphyrins, phthalocyanines, and quinizarin including their derivatives, several organic dyes, samarium and some other inorganic ions. The number of molecules reported to show hole formation so far is restricted compared to a wide variety of chemical structure of organic molecules. This would be because it is usually thought that for the hole formation the existence of a zero-phonon line in guest molecules for SHB should be accompanied by the occurrence of some photochemical reaction of the guest molecules. A well-known exception on this point is the so-called non-photochemical hole burning (NPHB) [4]. Recently triplet-triplet energy transfer of guest molecule to a host photo-reactive matrix has been reported to be a new family [5] of PSHB systems with new mechanism.","PeriodicalId":443330,"journal":{"name":"Spectral Hole-Burning and Related Spectroscopies: Science and Applications","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125091847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Studies on Photochemical Hole Burning in Japan 日本光化学烧孔研究

Spectral Hole-Burning and Related Spectroscopies: Science and Applications Pub Date : 1900-01-01 DOI: 10.1364/shbs.1994.thd1

To. Tani

引用次数: 0

Using Photochemical Hole Burning to Map Local Electric Fields 利用光化学孔燃烧法绘制局部电场图

Spectral Hole-Burning and Related Spectroscopies: Science and Applications Pub Date : 1900-01-01 DOI: 10.1364/shbs.1994.fb4

E. Fleischer, B. Kohler, J. C. Woehl

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Temperature-Annealing-Cycling Hole Burning Spectroscopies of Dye and Dye-Oligonucleotide Doped in Polymer Films 聚合物薄膜中掺杂染料和染料寡核苷酸的温度退火循环烧孔光谱

Spectral Hole-Burning and Related Spectroscopies: Science and Applications Pub Date : 1900-01-01 DOI: 10.1364/shbs.1994.wd16

Ta-Chau Chang, C. Chiang, S. Chou

引用次数: 0

Size Dependent Spectroscopy of CdSe Nanocrystallites CdSe纳米晶的尺寸依赖光谱

Spectral Hole-Burning and Related Spectroscopies: Science and Applications Pub Date : 1900-01-01 DOI: 10.1364/shbs.1994.fb1

M. Bawendi

{"title":"Size Dependent Spectroscopy of CdSe Nanocrystallites","authors":"M. Bawendi","doi":"10.1364/shbs.1994.fb1","DOIUrl":"https://doi.org/10.1364/shbs.1994.fb1","url":null,"abstract":"Semiconductor crystallites which are 10's of Angstroms show a striking evolution of electronic properties with size.1 These particles (quantum dots) are large enough to exhibit a crystalline core, but small enough that solid state electronic and vibrational band structure is not yet developed. We use a recently developed synthetic method for the synthesis of high quality nanometer size (1-10 nm) II-VI semiconductor crystallites with narrow size distributions (σ <5%), emphasizing CdSe.2 Optical characterization of their electronic structure using pump-probe techniques, luminescence, and DC Stark techniques reveals both molecular and bulk-like characteristics as well as properties which are unique to nanometer size crystallites. We observe a number of discrete electronic transitions, assign them as coming from the creation of delocalized \"particle-in-a-sphere\" states using the theory of Ref. 3, and study their dependence on crystallite diameter.4 The Stark experiments are also compatible with the absorbing states as delocalized symmetric states. We use time resolved fluoresence line narrowing spectroscopy to study the dynamics of electron-hole recombination. We observe significant changes in electron-LO phonon coupling with time, temperature, and crystallite size and suggest that the electron-hole pair dynamics following photoexcitation are dominated by surface effects which are especially important in the smaller crystallites where a large fraction of the atoms are \"surface\" atoms.5","PeriodicalId":443330,"journal":{"name":"Spectral Hole-Burning and Related Spectroscopies: Science and Applications","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125964355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Accumulated Photon Echo Spectroscopy of Ordered (CaF2) and Disordered (CaF2-YF3) crystals with Nd3+ ions 含有Nd3+离子的有序(CaF2)和无序(CaF2- yf3)晶体的累积光子回波光谱

Spectral Hole-Burning and Related Spectroscopies: Science and Applications Pub Date : 1900-01-01 DOI: 10.1364/shbs.1994.wd32

K. W. Steeg, R. Reeves, V. Fedorov, A. Karasik, T. Basiev, R. Powell

引用次数: 0