Patent ID: 7973924
Filing Date: 2011-07-05
Classification: B82Y,G01N,G02B

Abstract:
1. A sensor for determining a characteristic of a target substance, said sensor comprising: an electromagnetic wave source of supplying an electromagnetic wave; a photonic sensor element having a photonic crystalline structure and configured to include: a detector configured to receive the electromagnetic wave emitted from said sensing resonator to recognize an intensity variation of the electromagnetic wave and issue a signal indicative of a characteristic of said target substance; wherein said detector is configured to determine a density of said target substance based upon a characteristic variation of said electromagnetic wave and issue said signal indicative of the density of the target substance, wherein said photonic sensor element includes within said photonic crystalline structure a reference waveguide; and a reference resonator, said reference waveguide introducing said electromagnetic wave from said source, said reference resonator being electromagnetically coupled to said reference waveguide to resonate the introduced electromagnetic waver at said specific wavelength, said reference resonator being concealed from said target substance, said detector comprising: