“…A distributed feedback (DFB) laser, consisting of a solution-processable waveguide including a diffractive relief grating, has been a particularly successful TFOL which has already demonstrated its applicability, at laboratory scale, as tunable source for spectroscopy [2], amplifiers for optical communications [3,4], vapor explosive chemical sensors [5] and highly sensitive and possibly specific non-intrusive label-free sensors for drug discovery, biological research, diagnostic tests, food safety, etc. [6,7,8,9]. Today, one of the major challenges remaining to bring TFOLs to the real market is to find efficient, photostable, tunable and chemical versatile active material.…”