Abstract: Embodiments of the present disclosure pertain to at least one chiral compound with a photo-switchable unit. Additional embodiments of the present disclosure pertain to substrates that include one or more compounds of the present disclosure. Further embodiments of the present disclosure pertain to methods of changing a color of one or more regions of a substrate of the present disclosure by applying light to the one or more regions of the substrate.

Abstract: An electronic design automation (EDA) tool for adding a feature to a target parameterized cell (pcell) in an electronic circuit design includes a memory that stores the electronic circuit design, and a processor in communication with the memory. The processor defines a specification of an add-on pcell. The specification includes a feature to be added to the target pcell. The processor reads the properties associated with the target pcell and generates the add-on pcell based on its specification and the properties of the target pcell. The add-on pcell then is instantiated and bound to the target pcell, which adds the feature to the target pcell.