Enhancement of light-emitting efficiency of OLED by the electromagnetic-wave tunneling

In this Letter we present a new method enhancing the light-emission efficiency by electromagnetic-wave tunneling. The tunneling through negative-permittivity media has been confirmed recently. Under the conditions required by the method the transmittance of the emitted light can be close to unit for the normal incidence and also holds for the case of oblique incidence. The conditions of the tunneling for the proposed structure are given for E and H polarization, respectively.