【摘 要】
：
Two-photon excited spectroscopies from ex vivo human skin are investigated by using a femtosecond laser and a confocal microscope (Zeiss LSM 510 META). In the dermis, collagen is responsible for second harmonic generation (SHG); elastin, nicotinamide aden
【机 构】
：
KeyLaboratoryofOptoelectronicScienceandTechnologyforMedicine(FujianNormalUniversity),MinistryofEduca
【出 处】
：
ChineseOpticsLetters
论文部分内容阅读
Two-photon excited spectroscopies from ex vivo human skin are investigated by using a femtosecond laser and a confocal microscope (Zeiss LSM 510 META). In the dermis, collagen is responsible for second harmonic generation (SHG); elastin, nicotinamide adenine dinucleotide (NADH), melanin and porphyrin are the primary endogenous sources of two-photon excited autofluorescence. In the epidermis, keratin, NADH, melanin and porphyrins contribute to autofluorescence signals. The results also show that the SHG spectra have the ability to shift with the excitation wavelength and the autofluorescence spectra display a red shift of the spectral peaks when increasing the excitation wavelength. These results may have practical implications for diagnosis of skin diseases.
其他文献
用10ns倍频YAG激光泵浦实现了Ti3 :Al2O3激光运转,最大输出能量可达37 mJ,能量转换效率40%,斜率效率59%,量子效率80%,泵浦阈值0.5～1.2 J/cm2,在662～938 nm波长范围内实现了连续调谐.
为了凸显图像中的感兴趣目标,提出了基于特征融合的图像目标显著性检测方法。首先通过提取可见光图像不同尺度空间的不同特征,利用区域协方差理论融合尺度空间之间串接的不同特征,然后结合全局核密度估计体现图像的全局显著性,实现局部和全局特征融合的图像目标显著性检测。仿真结果表明,无论主观评价,还是客观指标,新方法均优于当前流行的图像显著性检测方法。
An in situ process monitor for the CuInxGa1?xSe2 (copper indium gallium selenide) (CIGS) coating system is a very important tool that produces repeatable, high-quality CIGS coatings. This letter provides an overview of the current state of application of
The plasmonic mode in graphene metamaterial provides a new approach to manipulate terahertz (THz) waves. Graphene-based split ring resonator (SRR) metamaterial is proposed with the capacity for modulating transmitted THz waves under normal and oblique inc
Au nanoparticles doped TiO2 nanowires (NWs) arrays with an average diameter of 100 nm were synthesized through a facile solvothermal method. Thereafter, metal/semiconductor/metal (MSM) structured detectors with Ag electrodes were fabricated on these NWs.
针对电子器件的散热问题, 提出了四种具有对称和等距凹槽的微通道, 并通过三维数值模拟, 研究了不同雷诺数下凹槽形状及布局对微通道性能的影响。结果表明:在给定的雷诺数范围内, 圆形凹槽的传热性能仅次于三角凹槽, 而梯形和矩形凹槽的传热性能较差。三角凹槽压降最大, 其次是圆形, 而梯形和矩形凹槽压降差异较小; 同种形状不同布局的凹槽, 压降几乎一致, 这表明通过改变凹槽布局来提高性能不会产生额外压降损失。综合换热和压降特性, 微通道热性能系数先增后减, 故三角凹槽在雷诺数为600时获得最优热性能, 而在雷诺数
利用空间匹配滤波的原理,提出了一种用于1∶N识别的光电混合匹配滤波相关器。利用计算机提前制作二值匹配滤波器,用计算机和FPGA直接计算识别所需要的功率谱,然后利用2f系统完成傅里叶变换,从而完成1∶N识别。从理论上对图像识别原理进行了分析,并用计算机仿真的方法加以验证,仿真结果表明,相关器输出锐的相关峰,具有很好的识别能力。
本文采用分步傅氏变换法对非线性单模光纤中源啁啾孤子相互作用进行了详细的数值研究.所得结果揭示了先源啁啾对孤子相互作用影响的本质,为设计光源啁啾情况下的孤子传转系统提供了依据.
Ali Javan在1974年6月参观访问了苏联的激光机构。下面是他回国后答记者问的摘要。