Kinetics of Excess Ag Atoms on Si(111)–\(\sqrt{3}\times\sqrt{3}\)-Ag Studied by Second-Harmonic Generation

2004 ◽  
Vol 73 (12) ◽  
pp. 3384-3388 ◽  
Author(s):  
Dongmei Deng ◽  
Mitsunori Numata ◽  
Takanori Suzuki
2008 ◽  
Vol 14 (6) ◽  
pp. 526-531 ◽  
Author(s):  
Jiang Jiang ◽  
Rafael Yuste

AbstractSecond-harmonic generation (SHG) can be used for imaging membrane potential in neurons, but poor signal-to-noise (S/N) limits accurate measurements of small voltage transients. We use photon counting to improve the S/N of weak SHG signal detection. Photon counting generates shot-noise limited and integrable signals, eliminates pulse-to-pulse variation, and built-in discriminators reduces the background to practically zero. In single trials, by using photon counting, we obtain a more than a twofold S/N increase over analog voltage detection. Trial-to-trial variability is also reduced by 50%. Finally, we show that, using photon counting, the kinetics of fast events such as action potentials can be recorded more accurately.


Langmuir ◽  
2011 ◽  
Vol 27 (22) ◽  
pp. 13533-13538 ◽  
Author(s):  
Cinzia Rotella ◽  
Simone Napolitano ◽  
Stefaan Vandendriessche ◽  
Ventsislav K. Valev ◽  
Thierry Verbiest ◽  
...  

2009 ◽  
Vol 206 (2) ◽  
pp. 321-325 ◽  
Author(s):  
Tatyana Volk ◽  
Dmitry Isakov ◽  
Michael Scott Belsley ◽  
Lyudmila Ivleva

Sign in / Sign up

Export Citation Format

Share Document