发布求助
文献互助 智能选刊 最新文献

ROMOPTO International Conference on Micro- to Nano- Photonics最新文献

筛选
英文 中文
Formation and stability of multidimensional structures in optics and atomic condensate: recent theoretical studies 光学和原子凝聚中多维结构的形成和稳定性:最新的理论研究
ROMOPTO International Conference on Micro- to Nano- Photonics Pub Date : 2010-05-17 DOI: 10.1117/12.858601
D. Mihalache
{"title":"Formation and stability of multidimensional structures in optics and atomic condensate: recent theoretical studies","authors":"D. Mihalache","doi":"10.1117/12.858601","DOIUrl":"https://doi.org/10.1117/12.858601","url":null,"abstract":"I give a brief overview of recent results in the area of both (2+1-and (3+1)-dimensional localized structures in some selected models in optics and atomic Bose-Einstein condensate. I concentrate on the existence, stability and robustness of these multidimensional localized structures and on the possibility of creation of spatiotemporal optical solitons in various optical settings.","PeriodicalId":308343,"journal":{"name":"ROMOPTO International Conference on Micro- to Nano- Photonics","volume":"310 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132743064","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
Fourier transform spectra of quantum dots 量子点的傅立叶变换谱
ROMOPTO International Conference on Micro- to Nano- Photonics Pub Date : 2009-09-17 DOI: 10.1117/12.862053
V. Damian, I. Ardelean, A. Armǎşelu, D. Apostol
{"title":"Fourier transform spectra of quantum dots","authors":"V. Damian, I. Ardelean, A. Armǎşelu, D. Apostol","doi":"10.1117/12.862053","DOIUrl":"https://doi.org/10.1117/12.862053","url":null,"abstract":"Semiconductor quantum dots are nanometer-sized crystals with unique photochemical and photophysical properties that are not available from either isolated molecules or bulk solids. These nanocrystals absorb light over a very broad spectral range as compared to molecular fluorophores which have very narrow excitation spectra. High-quality QDs are proper to be use in different biological and medical applications (as fluorescent labels, the cancer treatment and the drug delivery). In this article, we discuss Fourier transform visible spectroscopy of commercial quantum dots. We reveal that QDs produced by Evident Technologies when are enlightened by laser or luminescent diode light provides a spectral shift of their fluorescence spectra correlated to exciting emission wavelengths, as shown by the ARCspectroNIR Fourier Transform Spectrometer. In the final part of this paper we show an important biological application of CdSe/ZnS core-shell ODs as microbial labeling both for pure cultures of cyanobacteria (Synechocystis PCC 6803) and for mixed cultures of phototrophic and heterotrophic microorganisms.","PeriodicalId":308343,"journal":{"name":"ROMOPTO International Conference on Micro- to Nano- Photonics","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132471841","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: 6
Spectroscopic study of the plasmas generated by nanosecond laser ablation of Er3+-doped Ti:LiNbO3 targets 纳秒激光烧蚀Er3+掺杂Ti:LiNbO3靶产生等离子体的光谱研究
ROMOPTO International Conference on Micro- to Nano- Photonics Pub Date : 2009-09-17 DOI: 10.1117/12.858813
M. Stafe, C. Negutu, I. Vladoiu, S. Ciobanu, B. Savu, N. Puscas
{"title":"Spectroscopic study of the plasmas generated by nanosecond laser ablation of Er3+-doped Ti:LiNbO3 targets","authors":"M. Stafe, C. Negutu, I. Vladoiu, S. Ciobanu, B. Savu, N. Puscas","doi":"10.1117/12.858813","DOIUrl":"https://doi.org/10.1117/12.858813","url":null,"abstract":"This paper presents an experimental study of the ablation-plasmas and of the craters generated by focusing visible nanosecond laser pulses at normal incidence on a solid target of Er3+-doped Ti:LiNbO3, in atmospheric air. The laser irradiance was varied in the range of 0.25 to 2.5 TW/cm2, which is close to the plume-ignition threshold. The spatial variation of the neutral Li lines and of the temperature along the axial direction within the plasma plume was evaluated by scanning axially the plume image with a fiber that is coupled at the spectrometer entrance. The results indicate that the intensity of the neutral Li lines increases when increasing the distance from the target's surface. The plasma temperature calculated by accounting for these lines intensities is almost constant (~14000 K) being non-dependent on laser-irradiance and distance from the target. The spectroscopic study is augmented with an optical microscopy study of the ablated craters in order to determine the correlation between the ablation rate in multi-pulse regime and the plasma spectrum. The results indicate that monitoring the plasma spectrum at a fixed position above the target surface the lines intensity decrease with pulse number, probably due to the confinement of the plume into the deep crater that are drilled in multi-pulse regime.","PeriodicalId":308343,"journal":{"name":"ROMOPTO International Conference on Micro- to Nano- Photonics","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131765984","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
Using CHODIN to simulate the dynamics of coherent light scattering on nanofluids 用CHODIN模拟纳米流体上相干光散射的动力学
ROMOPTO International Conference on Micro- to Nano- Photonics Pub Date : 2009-09-17 DOI: 10.1117/12.866768
D. Chicea
{"title":"Using CHODIN to simulate the dynamics of coherent light scattering on nanofluids","authors":"D. Chicea","doi":"10.1117/12.866768","DOIUrl":"https://doi.org/10.1117/12.866768","url":null,"abstract":"If coherent light is incident on a suspension containing nanoparticles, the result of the far field interference is a \"speckled\" image. As a consequence of the complex Brownian motion the speckle image is not static but presents time fluctuations. A computer code to simulate the dynamics of the coherent light scattering on nanofluids was written, tested and used.","PeriodicalId":308343,"journal":{"name":"ROMOPTO International Conference on Micro- to Nano- Photonics","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114529437","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: 1
Speckle-based fiber optic method for registration of IR radiation 基于散斑的光纤红外辐射配准方法
ROMOPTO International Conference on Micro- to Nano- Photonics Pub Date : 2009-09-17 DOI: 10.1117/12.862384
I. Culeac, I. Nistor, M. Iovu, A. Andriesh
{"title":"Speckle-based fiber optic method for registration of IR radiation","authors":"I. Culeac, I. Nistor, M. Iovu, A. Andriesh","doi":"10.1117/12.862384","DOIUrl":"https://doi.org/10.1117/12.862384","url":null,"abstract":"A high sensitivity speckle based fiber-optic method for registration of low intensity IR radiation is proposed. The method is based on the effect of variation of the speckle pattern in the far-field of a multimode fiber. IR radiation that falls on a lateral surface of the fiber leads to variation of the speckle image. Computer processing of the speckle image provides information on the amplitude of the perturbation that hits the fiber. An algorithm has been developed for processing of the speckle image and determining of the intensity of IR radiation. The results of computer simulation correlate sufficiently well with experimental ones.","PeriodicalId":308343,"journal":{"name":"ROMOPTO International Conference on Micro- to Nano- Photonics","volume":"40 12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129090729","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
Analysis of climatic and anthropogenic changes effects on spectral vegetation indices in forest areas derived from satellite data 基于卫星数据的森林地区气候和人为变化对光谱植被指数的影响分析
ROMOPTO International Conference on Micro- to Nano- Photonics Pub Date : 2009-09-17 DOI: 10.1117/12.861468
M. Zoran
{"title":"Analysis of climatic and anthropogenic changes effects on spectral vegetation indices in forest areas derived from satellite data","authors":"M. Zoran","doi":"10.1117/12.861468","DOIUrl":"https://doi.org/10.1117/12.861468","url":null,"abstract":"Multifunctional role of forest is revealed by: short and long-term responses and reactions to a fast changing environment, forest being able to provide ecological and social services, to assure a forest-wood chain that meet the needs for forest based goods and products. Forest vegetation cover characteristics, including land cover and phenology, affect processes such as water cycle, absorption and re-emission of solar radiation, momentum transfer, carbon cycle, and latent and sensible heat fluxes.The climate system responds in complex ways to changes in forcing that may be natural or humaninduced. Drastic climate change over the last two decades has greatly increased the importance of global environmental study. In frame of this research, forest changes monitoring through satellite remote sensing can continually observe various surface processes playing an increasingly important role in large-scale environmental monitoring. Thresholding based on biophysical variables derived from time trajectories of satellite data is a new approach to classifying forest land cover changes. The input data are composite values of the Normalized Difference Vegetation Index (NDVI). Fusion technique was applied to Landsat TM, LANDSAT ETM, and IKONOS imagery for a forested area, Cernica, placed at the North Eastern part of Bucharest town, Romania, over a period 1989-2007. Specific aim of this paper is to assess, forecast, and mitigate the risks of climatic changes on forest systems.","PeriodicalId":308343,"journal":{"name":"ROMOPTO International Conference on Micro- to Nano- Photonics","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130451196","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: 2
Quantum entanglement of two-mode continuous variable states in a thermal reservoir 热储中双模连续变态的量子纠缠
ROMOPTO International Conference on Micro- to Nano- Photonics Pub Date : 2009-09-17 DOI: 10.1117/12.862060
A. Isar
{"title":"Quantum entanglement of two-mode continuous variable states in a thermal reservoir","authors":"A. Isar","doi":"10.1117/12.862060","DOIUrl":"https://doi.org/10.1117/12.862060","url":null,"abstract":"Using the theory of open systems based on completely positive quantum dynamical semigroups, we describe the dynamics of entanglement for a system consisting of two uncoupled harmonic oscillators interacting with a thermal reservoir. Using Peres-Simon necessary and sufficient criterion for separability of two-mode Gaussian states, we describe the evolution of entanglement in terms of the covariance matrix for a Gaussian input state. For some values of the temperature of environment, the state keeps for all times its initial type - separable or entangled. In other cases, entanglement generation, entanglement sudden death or a repeated collapse and revival of entanglement take place. We analyze also the time evolution of the logarithmic negativity, which characterizes the degree of quantum entanglement.","PeriodicalId":308343,"journal":{"name":"ROMOPTO International Conference on Micro- to Nano- Photonics","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114135172","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 nonlinear Gd1-xRxCa4O(BO3)3 (R = Lu, Sc) crystals for 400-nm blue-violet light generation by type-I noncritical phase-matching frequency doubling processes 新型非线性Gd1-xRxCa4O(BO3)3 (R = Lu, Sc)晶体，用于i型非临界相匹配倍频工艺产生400 nm蓝紫光
ROMOPTO International Conference on Micro- to Nano- Photonics Pub Date : 2009-09-17 DOI: 10.1117/12.859049
L. Gheorghe, A. Achim, P. Loiseau, G. Aka
{"title":"New nonlinear Gd1-xRxCa4O(BO3)3 (R = Lu, Sc) crystals for 400-nm blue-violet light generation by type-I noncritical phase-matching frequency doubling processes","authors":"L. Gheorghe, A. Achim, P. Loiseau, G. Aka","doi":"10.1117/12.859049","DOIUrl":"https://doi.org/10.1117/12.859049","url":null,"abstract":"Single crystals of Gd1-xRxCa4O(BO3)3 (R3+ = Sc3+ or Lu3+) with large size and good quality have been grown by Czochralski method. The optical birefringence of Gd1-xScxCa4O(BO3)3 and Gd1-xLuxCa4O(BO3)3 crystals can be controlled by changing the compositional parameter x. The chemical compositions of the grown crystals were determined and X-ray diffraction measurements have been carried out to characterize the structural changes with compositional parameter x. According to our assumptions, the obtained results demonstrate that two of the grown crystals convert the near-infrared radiation of 800nm into blue-violet light (400nm) by type-I noncritical phase-matching (NCPM) second-harmonic generation (SHG) processes along Y axis.","PeriodicalId":308343,"journal":{"name":"ROMOPTO International Conference on Micro- to Nano- Photonics","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121723699","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
Novel optoelectronic system for fast acquisition of reflection spectra 反射光谱快速采集的新型光电系统
ROMOPTO International Conference on Micro- to Nano- Photonics Pub Date : 2009-09-17 DOI: 10.1117/12.866772
V. Teplov, L. Fauch, R. Saarenheimo, E. Nippolainen, A. Kamshilin
{"title":"Novel optoelectronic system for fast acquisition of reflection spectra","authors":"V. Teplov, L. Fauch, R. Saarenheimo, E. Nippolainen, A. Kamshilin","doi":"10.1117/12.866772","DOIUrl":"https://doi.org/10.1117/12.866772","url":null,"abstract":"We present novel optical system capable for fast acquisition of two-dimensional distribution of reflection spectra with high spatial resolution. It is based on a subspace vector model of surface reflections. The system consists of a computer controlled set of light-emitting diodes (LED) and a monochrome CCD camera. Spatial distribution of reflection spectra is acquired in the compressed form. These compressed data can be directly used for accurate classification or recognition of different parts of the surface under study. We demonstrated experimentally that 2D distribution of spectral reflectance from the object surface can be captured within 140ms. Such a fast instrument of multispectral imaging could be extremely useful particularly for researchers who study living biological objects.","PeriodicalId":308343,"journal":{"name":"ROMOPTO International Conference on Micro- to Nano- Photonics","volume":"7 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132609936","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
Modeling of the Er3+-doped Ti:LiNbO3 optical waveguide couplers Er3+掺杂Ti:LiNbO3光波导耦合器的建模
ROMOPTO International Conference on Micro- to Nano- Photonics Pub Date : 2009-09-17 DOI: 10.1117/12.858812
N. Puscas, S. Ciobanu, C. Negutu, M. Stafe
{"title":"Modeling of the Er3+-doped Ti:LiNbO3 optical waveguide couplers","authors":"N. Puscas, S. Ciobanu, C. Negutu, M. Stafe","doi":"10.1117/12.858812","DOIUrl":"https://doi.org/10.1117/12.858812","url":null,"abstract":"This paper reports some modelling results concerning a novel Er3+:Ti:LiNbO3 optical waveguide directional coupler. Based on the mode coupling theory we evaluated the coupling coefficient between the straight and curved waveguides of the directional coupler. Also, using a quasi-two-level model in the small gain approximation and the unsaturated regime in this paper we report some original results concerning the evaluation of the spectral optical gain, spectral noise figure and spectral signal-to-noise ratio in the bent Er3+:Ti:LiNbO3 waveguide of the directional coupler pumped near 1484 nm performed for erfc, Gaussian and constant profile of the Er3_ ions in LiNbO3 crystal.","PeriodicalId":308343,"journal":{"name":"ROMOPTO International Conference on Micro- to Nano- Photonics","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115595844","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
下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信
小红书