CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference最新文献_第6页

Strong dependence of the Linewidth Enhancement Factor onto an externally injected optical signal for locked Fabry-Perot laser diodes 锁态法布里-珀罗激光二极管线宽增强因子对外部注入光信号的强依赖性

CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference Pub Date : 2009-06-14 DOI: 10.1109/CLEOE-EQEC.2009.5191594

Q. Nguyen, P. Besnard, O. Vaudel, A. Shen, G. Duan

引用次数: 5

Laser sintering of photoelectrode layers for Dye Solar Cell technology 染料太阳能电池光电极层激光烧结技术

CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference Pub Date : 2009-06-14 DOI: 10.1109/CLEOE-EQEC.2009.5192160

G. Mincuzzi, L. Vesce, R. Riccitelli, A. Reale, A. Di Carlo, T. Brown

引用次数: 0

Cr4+:YAG passive Q-switching of directly pumped Nd lasers 直接泵浦Nd激光器的Cr4+:YAG无源q开关

CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference Pub Date : 2009-06-14 DOI: 10.1109/CLEOE-EQEC.2009.5192175

N. Pavel, T. Dascălu, V. Lupei, N. Vasile

引用次数: 1

Simple and efficient 2-TW Optical Parametric Chirped Pulse Amplifier 简单高效的2-TW光参量啁啾脉冲放大器

CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference Pub Date : 2009-06-14 DOI: 10.1109/CLEOE-EQEC.2009.5196438

P. Wnuk, Y. Stepanenko, Czeslaw Radzwicz

引用次数: 0

Ultrafast confocal microscope for time-resolved imaging of thin films 用于薄膜时间分辨成像的超快共聚焦显微镜

CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference Pub Date : 2009-06-14 DOI: 10.1109/CLEOE-EQEC.2009.5192047

D. Polli, J. Clark, M. Celebrano, G. Grancini, G. Lanzani, G. Cerullo

{"title":"Ultrafast confocal microscope for time-resolved imaging of thin films","authors":"D. Polli, J. Clark, M. Celebrano, G. Grancini, G. Lanzani, G. Cerullo","doi":"10.1109/CLEOE-EQEC.2009.5192047","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2009.5192047","url":null,"abstract":"A peculiar feature of organic semiconductors is structural inhomogeneity: in the solid state they are generally amorphous or polycrystalline, with local order only achieved in mesoscopic domains with size typically ranging from 10 nm to 1 µm [1]. The dimensions and types of these domains have a decisive influence on excited state dynamics, which in turn determines fluorescence quantum yield, charge carrier mobility and generation efficiency, crucial parameters for optimizing the efficiency of organic optoelectronic devices. Femtosecond pump-probe spectroscopy provides a wealth of information on the photophysics of organic semiconductors [2]. Experiments are usually performed over relatively large sample areas, with diameter of the order of several tens of microns, thus obtaining a macroscopic information that is averaged over many mesoscopic domains. In this paper we present a novel instrument which combines the spatial resolution of confocal microscopy with the temporal resolution and spectral sensitivity of femtosecond pump-probe spectroscopy using broadband detection.","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128668221","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

Photovoltaic self-focusing in lithium niobate 铌酸锂的光伏自聚焦

CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference Pub Date : 2009-06-14 DOI: 10.1109/CLEOE-EQEC.2009.5194830

J. Parravicini, P. Minzioni, V. Degiorgio, E. Delre

{"title":"Photovoltaic self-focusing in lithium niobate","authors":"J. Parravicini, P. Minzioni, V. Degiorgio, E. Delre","doi":"10.1109/CLEOE-EQEC.2009.5194830","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2009.5194830","url":null,"abstract":"Photorefractive media are known to support spatial solitons, i.e. beams that do not spread during propagation because self-focusing may balance natural diffraction [1]. For visible wavelengths this also occurs in lithium-niobate (LN), one of the most important crystals in modern optical technology. Previous studies have shown that when LN is not biased, beams undergo strong self-defocusing. The effect is attributed to the nature of the photovoltaic effect that drives photorefractive charge separation, and in particular to the sign of the relevant Glass coefficient. The result is that in these conditions only one class of solitons can be observed, the so-called dark solitons, consisting in dark notches in an otherwise illuminated wavefront that maintain unaltered their shape [2]. In turn, in unbiased barium-titanate an appropriate geometry can be found for which the photovoltaic nonlinearity is “opposite“ to that of LN and can lead to bright solitons, that is beams that have a bell-like transverse intensity profile centred on the beam axis [3]. Whereas LN is known to support self-focusing and bright solitons through the χ2 nonlinearity [4], or through the screening-photovoltaic nonlinearity, that is when it is biased by an external field [5,6], to date no self-focusing and bright self-trapping is known to occur through the photorefractive effect in an unbiased sample.","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129358965","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

Micro-welding of glass by fs-laser irradiation and process observation using fs-pump-probe white light interference microscopy fs激光辐照玻璃微焊接及fs泵浦探针白光干涉显微观察

CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference Pub Date : 2009-06-14 DOI: 10.1109/CLEOE-EQEC.2009.5192327

D. Wortmann, I. Mingareev, A. Brand, A. Horn

{"title":"Micro-welding of glass by fs-laser irradiation and process observation using fs-pump-probe white light interference microscopy","authors":"D. Wortmann, I. Mingareev, A. Brand, A. Horn","doi":"10.1109/CLEOE-EQEC.2009.5192327","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2009.5192327","url":null,"abstract":"The miniaturization of optical components claims for new methods for assembling e.g. micro lenses on integrated optical circuits or sealing of OLEDs in order to improve productivity and quality. Welding of glass for micro-technological application is still a field of research, because scaling-down the welding seam into the micrometer scale implicates also sub-micrometer heat-affected zones [1]. The localized melting in the volume and the welding of borosilicate and quarz glasses by ultrafast laser radiation (λ = 1045 nm, IMRA, µJewel D-1000) with femtosecond pulse durations has been investigated. A wide range of further applications like the writing of waveguides [2] and the micro-structuring by material modification and subsequent etching [3] is based on the same initial processes. The non-linear absorption of the fs-laser radiation, localized melting and the fast cooling of the material are the basic processes for all these techniques. Compression and expansion of material lead to refractive index changes as well as local differences in the temperature.","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124561770","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

Noise enhanced transport in light-harvesting complexes and networks 噪音增强了光收集复合物和网络的传输

CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference Pub Date : 2009-06-14 DOI: 10.1109/CLEOE-EQEC.2009.5191518

A. Datta, A. Chin, F. Caruso, S. Huelga, M. Plenio

{"title":"Noise enhanced transport in light-harvesting complexes and networks","authors":"A. Datta, A. Chin, F. Caruso, S. Huelga, M. Plenio","doi":"10.1109/CLEOE-EQEC.2009.5191518","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2009.5191518","url":null,"abstract":"Energy transport in light-harvesting photosynthetic complexes has been a topic of continued interest [1]. It is recognized that the initial steps of natural photosynthesis harness the available light energy at typically about 95–99% efficiency. This has attracted considerable attention recently due to the observation of quantum coherence in the dynamics of photosynthetic complexes using 2D femtosecond spectroscopy [2,3]. On the other hand the dynamics takes place in a very noisy environment and hence it will have to be taken into account when seeking an accurate theoretical description of the dynamics. This has rejuvenated interest in the relative roles of coherent and incoherent dynamics in the enhanced energy transfer in light-harvesting complexes [4–6]. In fact, we find that noise in conjunction with quantum coherence is an essential ingredient for high efficiency excitation transfer in quantum networks. We demonstrate the existence of noise assisted transport at the example of the Fenna-Matthew-Olson (FMO) complex, found in photosynthetic green sulphur bacteria. Similar effects are apparent in other natural systems like LH1 as well as artificial light-harvesting structures like dendrimers. Most importantly, this effect allows us to exploit noise rather than make strenuous attempts to avoid it. In light of this, we can exploit these effects in the transport of energy and information, and other effects [7].","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129650659","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

Laser pulse reshaping by means of nonlinear effects in a low birefringence optical fiber 利用非线性效应在低双折射光纤中的激光脉冲整形

CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference Pub Date : 2009-06-14 DOI: 10.1109/CLEOE-EQEC.2009.5196571

F. Doutre, V. Couderc, D. Pagnoux

引用次数: 0

Quantum engineering of colloidal core-shell quantum dots: towards non blinking quantum dots and biexcitonic emission 胶体核壳量子点的量子工程:迈向非闪烁量子点和双激子发射

CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference Pub Date : 2009-06-14 DOI: 10.1109/CLEOE-EQEC.2009.5191473

P. Spinicelli, B. Mahler, S. Buil, X. Quélin, B. Dubertret, J. Hermier

引用次数: 0