Electromagnetically Induced Transparency Observed inTwo-photon Transitions ofK2

Li Li, Peng Qi, Angelos Lazoudis +2 more

Peng Qi, Angelos Lazoudis, Ergin H. Ahmed +2 more

Electromagetically Induced Transparency (EIT) has been observed in K2two-photon transitions using a single laser. The intermediate mixed state A1Σu+∼b3Πuresonantly enhanced the two-photon 23Πg→X1Σg+transition.

Wenchao Xu, Brian DeMarco

Lianshui Zhang, Xiaoli Li, Wang Jian +5 more

Electromagnetically induced transparency (EIT) resonance is obtained in a well-studied lambda three level system where an optical coupling field and a probing field interact with two optical transitions. However, both electromagnetically induced absorption (EIA) and EIT can be obtained in a modified quasi-lambda four level system consisting of an optical-radio two-photon coupling field and a probing field. By solving the density matrix equation of motion, a physical account of EIA and EIT is given in terms of a dressed state picture. It can be seen that the optical coupling field in this quasi-lambda four level system has a crucial effect on the forming of EIA and EIT. An EIA is observed under a resonant optical coupling and it evolves into an EIT when there is a detuning. Furthermore, the width of EIA or EIT increases as the optical coupling Rabi frequency increases.

Changjiang Wei, Neil B. Manson

A sharp transparency feature is induced in an allowed electron spin resonance (ESR) transition by driving a nominally spin-forbidden transition. The width of the feature is narrower than the homogeneous linewidth of the ESR transition and is interpreted as being associated with electromagnetically induced transparency (EIT). Measurements are made for the nitrogen-vacancy centre in diamond and the signals are detected using a coherent optical technique.

Chin‐Chun Tsai, Hsiang‐Chen Chui, Yi-Chih Lee +3 more