Characteristics of the finite Olver Gaussian beam propagating in the sandwich slab system

Based on the transfer matrix and generalized Huygens-Fresnel integral equation, the evolution of a finite Olver Gaussian beam (FOGB) propagating in the multilayered sandwich slab system contained right handed material and double negative material alternate is studied in detail, the influence of adjustment factor and decay factor on the FOGB intensity evolution is further researched, the transmission properties of finite Airy Gaussian beam (FAiGB) regarded as the zeroth-order non-diffracting beam of the FOGB is discussed as well. In addition, we also propose an optical sensor to measure the concentration of alcohol solution, of which the operating principle is thoroughly explored. It is expected that the proposed optical sensor and the corresponding conclusions will be a useful supplement to chemical concentration detector.