The ability to control the light polarization state is critically important for diverse applications in information processing, telecommunications, and spectroscopy. Here, we propose that a stack of anisotropic van der Waals materials can facilitate the building of optical elements with Jones matrices of unitary, Hermitian, non-normal, singular, degenerate, and defective classes. We show that the twisted stack with electrostatic control can function as arbitrary-birefringent wave-plate or arbitrary polarizer with tunable degree of non-normality, which in turn give access to plethora of polarization transformers including rotators, pseudorotators, symmetric and ambidextrous polarizers. Moreover, we discuss an electrostatic-reconfigurable stack which can be tuned to operate as four different polarizers and be used for Stokes polarimetry.
K. K and T.L. acknowledge partial support by the National Science Foundation, NSF/EFRI Grant No. EFRI-1741660, and the DDF UMN support for K. K.LM-MacknowledgesProjectPID2020-115221GB-C41 financed by MCIN/AEI/10.13039/501100011033 and the Aragon Government through Project Q-MAD. S.-H.O. acknowledges support from the Samsung Global Research (GRO) Program and the Sanford P. Bordeau Chair at the University of Minnesota.