Continuous-wave terahertz self-referencing digital holography based on Fresnel's mirrors

We present a continuous-wave terahertz (THz) full-field phase imaging approach based on self-referencing digital holography. The wavefront downstream is split by Fresnel's mirrors, which is composed by two independently tip-tilt controlled square mirrors. Off-axis hologram is recorded by interference between the wave scattered by the object and the unscattered reference beam.