Optical switches selectively switch optical signal from switched-on to switched-off. Compared to the traditional electronic switches, optical switches are not limited by thermal effects or electromagnetic interferences. Here we show metamaterials-based probing of weak quantum absorber in coupled three-resonator system which reveals the signature of optical switching. The polarization dependent probing of molecular overtones excited in a hybrid system tune the state: when the system is illuminated by transverse magnetic polarized light the switch is on while for the transverse electric polarized light the switch is off.