Fig. 4: Lasing emission of bend and stretched QDCLC films.
From: Quantum dot lasing from a waterproof and stretchable polymer film

a Photograph and b Emission spectrum of a bent QDCLC laser on an adhesive film. c Illustration of how the free-standing QDCLC film with a thickness of 15 µm and a length of 15 mm is stretched to increase the length by 170 µm. d Emission spectra of the stretched laser with various stretch amplitudes and e corresponding simulation in which the thickness of the layers is reduced proportionally with the stretching amplitude