Choong Hwan LEE, Ju Eun PARK, Byoung Joo KIM, Myoungsik CHA*
Department of Physics, Pusan National University, Busan 46241, Korea
Correspondence to: email@example.com
Received July 1, 2016; Revised October 31, 2016; Accepted November 11, 2016.
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We used a dipole antenna detector to measure the interference fringes formed by crossing two polarized microwaves. In particular, we could observe, depending on the orientation of the detector, interference even when the polarizations were orthogonal, which was explained by the superposition of two plane electromagnetic (EM) waves. Our result does not agree with the conventional definition of the irradiance as the time-averaged magnitude of the Poynting vector of the total EM field. The discrepancy can be explained by the fact that in contrast to isotropic semiconductor photodetectors, a dipole antenna can detect a specific component of the electric field. We demonstrated that the interference of fast oscillating EM waves, including light, can be detected in different ways depending on the detector's characteristics.