Compact phase delay technique for increasing the amplitude of coherent population trapping resonances in open Lambda systems.
We propose and demonstrate a novel technique for increasing the amplitude of coherent population trapping (CPT) resonances in open Lambda systems. The technique requires no complex modifications to the conventional CPT setup and is compatible with standard microfabrication processes. The improvement in the CPT resonance amplitude as a function of intensity of the excitation light agrees well with the theory based on ideal open and closed Lambda systems.
Shah
V
V
Time and Frequency Division, National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA. vshah@boulder.nist.gov
Knappe
S
S
Schwindt
P D D
PD
Gerginov
V
V
Kitching
J
J