Spectral line-shape measurement of an extremely weak amplitude-fluctuating light source by photon-counting-based second-order correlation spectroscopy.
We demonstrate line-shape measurement of an extremely weak amplitude-fluctuating light source by using photon-counting-based second-order correlation spectroscopy combined with the heterodyne technique. The amplitude fluctuation of a finite bandwidth introduces a low-lying spectral structure in the line shape, and thus its effect can be isolated from that of the phase fluctuation. Our technique provides extreme sensitivity suited for single-atom-level applications.
Hong
Hyun-Gue
HG
Department of Physics and Astronomy, Seoul National University, Seoul, South Korea.
Seo
Wontaek
W
Lee
Moonjoo
M
Choi
Wonshik
W
Lee
Jai-Hyung
JH
An
Kyungwon
K