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Field-resolved infrared spectroscopy of biological systems 期刊论文
NATURE, 2020, 577 (7788) : 52-+
作者:  Pupeza, Ioachim;  Huber, Marinus;  Trubetskov, Michael;  Schweinberger, Wolfgang;  Hussain, Syed A.;  Hofer, Christina;  Fritsch, Kilian;  Poetzlberger, Markus;  Vamos, Lenard;  Fill, Ernst;  Amotchkina, Tatiana;  Kepesidis, Kosmas V.;  Apolonski, Alexander;  Karpowicz, Nicholas;  Pervak, Vladimir;  Pronin, Oleg;  Fleischmann, Frank;  Azzeer, Abdallah;  Zigman, Mihaela;  Krausz, Ferenc
收藏  |  浏览/下载:30/0  |  提交时间:2020/07/03

The proper functioning of living systems and physiological phenotypes depends on molecular composition. Yet simultaneous quantitative detection of a wide variety of molecules remains a challenge(1-8). Here we show how broadband optical coherence opens up opportunities for fingerprinting complex molecular ensembles in their natural environment. Vibrationally excited molecules emit a coherent electric field following few-cycle infrared laser excitation(9-12), and this field is specific to the sample'  s molecular composition. Employing electro-optic sampling(10,12-15), we directly measure this global molecular fingerprint down to field strengths 10(7) times weaker than that of the excitation. This enables transillumination of intact living systems with thicknesses of the order of 0.1 millimetres, permitting broadband infrared spectroscopic probing of human cells and plant leaves. In a proof-of-concept analysis of human blood serum, temporal isolation of the infrared electric-field fingerprint from its excitation along with its sampling with attosecond timing precision results in detection sensitivity of submicrograms per millilitre of blood serum and a detectable dynamic range of molecular concentration exceeding 10(5). This technique promises improved molecular sensitivity and molecular coverage for probing complex, real-world biological and medical settings.


  
How Does the Unique Space-Time Sampling of the SWOT Mission Influence River Discharge Series Characteristics? 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (14) : 8154-8161
作者:  Nickles, Cassandra;  Beighley, Edward;  Zhao, Yuanhao;  Durand, Michael;  David, Cedric;  Lee, Hyongki
收藏  |  浏览/下载:15/0  |  提交时间:2019/11/27
SWOT  temporal sampling  river discharge  Mississippi River Basin  remote sensing  
Rainfall monitoring network design using conditioned Latin hypercube sampling and satellite precipitation estimates: An application in the ungauged Ecuadorian Amazon 期刊论文
INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2019, 39 (4) : 2209-2226
作者:  Contreras, Juan;  Ballari, Daniela;  de Bruin, Sytze;  Samaniego, Esteban
收藏  |  浏览/下载:14/0  |  提交时间:2019/11/26
conditioned Latin hypercube sampling  Ecuadorian Amazon  poorly accessible areas  rain gauge network  satellite precipitation data  spatio-temporal monitoring  ungauged areas  
The varying driving forces of urban expansion in China: Insights from a spatial-temporal analysis 期刊论文
LANDSCAPE AND URBAN PLANNING, 2018, 174: 63-77
作者:  Li, Guangdong;  Sun, Siao;  Fang, Chuanglin
收藏  |  浏览/下载:26/0  |  提交时间:2019/04/09
Urban expansion  Driving forces  National-level sampling  Spatial-temporal modelling  Spatial Probit model  China