  We propose a scheme to achieve the analogous interface-state laser by dint of
the interface between the two intermediate-resonator-coupled non-Hermitian
resonator chains. We find that, after introducing the couplings between the two
resonator chains and the intermediate resonator at the interface, the photons
of the system mainly gather into the three resonators near the intermediate
resonator. The phenomenon of the photon gathering towards the certain
resonators is expected to construct the photon storage and even the laser
generator. We reveal that the phenomenon is induced via the joint effect
between the isolated intermediate resonator and two kinds of non-Hermitian skin
effects. Specially, we investigate the interface-state laser in topologically
trivial non-Hermitian resonator array in detail. We find that the pulsed
interface-state laser can be achieved accompanying with the intermittent
proliferation of the photons at the intermediate resonator when an arbitrary
resonator is excited. Also, we reveal that the pulsed interface-state laser in
the topologically trivial non-Hermitian resonator array is immune to the
on-site defects in some cases, whose mechanism is mainly induced by the
nonreciprocal couplings instead of the protection of topology. Our scheme
provides a promising and excellent platform to investigate interface-state
laser in the micro-resonator array.
