Imprinted Conjugated Polymer Laser

The realization of a distributed feedback structure by direct imprinting into a highly luminescent conjugated polymer and the subsequent lasing action from the structure (see cover) is reported. The fabrication is achieved using liquid imprinting; a new soft‐lithographic technique, which is a combination of two established techniques: micromolding in capillaries and liquid embossing. The inexpensiveness and repeatability of the process makes this approach very promising for mass production of conjugated polymer solid‐state laser devices.