Abstract
A simple method has been proposed to fabricate active waveguide grating structures as distributed feedback configuration for organic crystal lasers. Organic single crystals, 2,5-bis(4-biphenyl)bithiophene (BP2T), act as both the gain medium and the waveguide. The distributed feedback structures are fabricated separately on top of crystals through interference lithography. The lasing emissions centered at 566nm with FWHM of 1.1nm have been observed when the pump intensity exceeds 19μJcm−2. This method features simple, nondestructive, and it is expected to be applied in the electronically pumped laser devices.
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