Low-threshold blue lasing from silk fibroin thin films

Abstract

Silk is a natural biocompatible material that can be integrated in a variety of photonic systems and optoelectronic devices. The silk replication of patterned substrates with features down to tens of nanometers is exploited to realize highly transparent, mechanically stable, and free-standing structures with optical wavelength size. We demonstrate organic lasing from a blue-emitting stilbenedoped silk film spin-coated onto a one-dimensional distributed feedback grating (DFB). The lasing threshold is lower than that of organic DFB lasers based on the same active dye. These findings pave the way to the development of an optically active biocompatible technological platform based on silk.

Microsphere Solid‐State Biolasers

“…[7,8] WGM lasers made of polymers of biological origin are of interest for biosensing. To date, various biolasers have been investigated using random cavity, [9][10][11][12][13] distributed feedback, [14][15][16] Fabry-Perot (F-P), [17][18][19] and WGM capillary tube. [20] Generally, current devices are large (>>100 µm) and mainly rely on a time was 10, 60, 90 min for BSA, pectin, cellulose spheres, respectively.…”

Dynamics of DFB dye lasing by polarization modulation: simulations and experiment

“…Due to their important merits, DFB dye lasers are still the subject of steady attention and intensive study by scientists from different research centers (see some recent publications [19,20,21,22,23,24,25,26]). …”

Low-threshold stimulated emission from lysozyme amyloid fibrils doped with a blue laser dye

“…In the case of probing the homogenous area of the film, the value of the threshold was estimated to be around q th % 200 lJ/cm 2 , which is an order of magnitude lower than typical values for chromophores incorporated in polymer matrices 21 and the same magnitude as the value reported for silk fibroin. 22 However, the most striking effect was observed when probing the edge area that contained cracks [ Fig. 2(c)].…”