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In this paper we investigate the photonic tunneling effect between two coupled one-atom laser cavities. The
physical system consists of two coupled photonic crystal microcavities and each cavity contains a coherently
pumped two-level atom. The dynamics of the system can be described by the master equation in terms of the
reduced density operator. It is shown that the photonic tunneling behavior depends on certain physical conditions
of the system. In the absence of the pumping field andwithout dissipations, the coherent photon number imbalance
between two cavities exhibits the alternating-current Josephson effect. However, when the pumping effect and
losses of the system are taken into account, the mean photon number imbalance displays a damped oscillation. In
addition, the influence of tunneling amplitude and photonic band-gap structure on the oscillations is also studied.
The research gives a further insight into the correlated dynamics of two coupled one-atom laser systems and
provides an idea for constructing novel photon tunnel devises.

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