Negative index media have a phase velocity opposite to that of the pointing vector. Therefore, if media having the same absolute value of positive and negative refractive indices are alternately arranged, standing waves are generated along the boundaries of the media because these wavelengths are the same and the directions are opposite. We propose a method of generating a stationary interference fringe that is caused by self-interference with irradiating light from a direction parallel to the positive and negative media boundaries.
