  Monitoring and controlling the state of polarization of electromagnetic waves
is of significant interest for various basic and practical applications such as
linear position sensing and medical imaging. Here, we propose the first
conformal digital metamaterial absorber to detect the polarization state of THz
incident waves. The proposed polarimeter is capable of characterizing four
independent polarization states of (TE, TM, $\pm {45^\circ}$ linear, and
RCP/LCP) by observing the reflectivity of the structure with respect to the x-
and y-direction. Besides, the proposed structure displays a strong absorptivity
above 90\% up to the incidence angle of $50^{\circ}$ for oblique incident waves
with different polarizations. By mere changing the bias voltage of two
orthogonal VO2 microwires via two independent computer-programmed multichannel
DC network, distinct conditions for reflected waves occurs under excitations of
different polarizations, whereby the polarization state of the incident wave
may readily be estimated. We believe that the proposed metasurface-based
polarimeter can pave the way for polarization detection applications on curved
surfaces.
