Abstract: A metamaterial is suitable for receiving a detecting wave. The detecting wave interacts with the metamaterial. The metamaterial includes a substrate and at least one unit cell placed on the substrate. The size of the unit cell is at least less than ? of the wavelength of the detecting wave. A biological and chemical detecting system using the metamaterial is also disclosed.

Abstract: An optical interferometric apparatus comprises a light source emitting a coherent light, a polarizing beam-splitting element splitting the light into a first light and second light which travel along an optical fiber element and then are combined. Then, a beam-splitting element split the combined light into a third light and a fourth light, and a first phase-modulation element and a second phase-modulation element respectively are disposed on the optical paths of the third and fourth lights. A first polarization element and a second polarization element respectively superpose the P wave and S wave of the third and fourth lights, and a first detection element and a second detection element respectively detect the third and fourth lights to respectively generate a first polarized signal and a second polarized signal. A demodulation computing element is used to calculate and determine phase information according to the first and second polarized signals.