ultrafast spectroscopy;
frequency combs;
cavity-enhanced spectroscopy;
FREQUENCY COMB SPECTROSCOPY;
EXCITED-STATE DYNAMICS;
INFRARED-SPECTROSCOPY;
LASER SPECTROSCOPY;
TIME;
CLUSTERS;
WATER;
INTERFEROMETER;
TECHNOLOGY;
VIBRATIONS;
D O I:
10.1088/1361-6455/50/4/044004
中图分类号:
O43 [光学];
学科分类号:
070207 ;
0803 ;
摘要:
We describe methods using frequency combs and optical resonators for recording two-dimensional (2D) ultrafast spectroscopy signals with high sensitivity. By coupling multiple frequency combs to higher-order modes of one or more optical cavities, background-free, cavity-enhanced 2D spectroscopy signals are naturally generated via phase cycling. As in cavity-enhanced ultrafast transient absorption spectroscopy, the signal to noise is enhanced by a factor proportional to the cavity finesse squared, so even using cavities of modest finesse, a very high sensitivity is expected, enabling ultrafast 2D spectroscopy experiments in dilute molecular beams.
机构:
Yokohama City Univ, Grad Sch Arts & Sci, Yokohama, Kanagawa 2360027, JapanYokohama City Univ, Grad Sch Arts & Sci, Yokohama, Kanagawa 2360027, Japan
机构:
Yokohama City Univ, Grad Sch Arts & Sci, Yokohama, Kanagawa 2360027, JapanYokohama City Univ, Grad Sch Arts & Sci, Yokohama, Kanagawa 2360027, Japan