Tight-focusing properties of radially polarized chirped circular Airy Gaussian beam

We investigate the tight-focusing properties of radially polarized chirped circular Airy Gaussian beam (RPCCAiGB) based on the Richards-Wolf vectorial diffraction theory. The RPCCAiGB propagating through a high numerical aperture objective lens enables the intensity of the longitudinal component to surpass the intensity of the radial component. The focal length, the focused intensity and the radiation forces of the RPCCAiGB are tunable by setting different optical distribution factors and radii of the primary ring. The chirped parameter influences the magnitude of radiation forces and enables an access to the desired focal position of the beam. These results can be potentially applied to many aspects, such as optical communication, optical trapping and medical treatment.