Metallic structure and opto-electronic apparatus

Metallic structures and optoelectronic devices is disclosed. Metallic structure is used to filter or polarization electromagnetic waves, a light acceptable medium, a first metallic block and the second metal block. First and second metal block are spaced apart parallel to one another and a predefined distance (d) from each other, are disposed on the inside of the light or allow the medium. Electromagnetic wave has a distribution curve of the transmittance compared to wavelength after passing through the metallic structure, the distribution curve has at least one peak value of the transmittance corresponding to the at least one wavelength in a one-to-one manner. The average width (w) of the pre-defined distance (d) and the first metal block is d