Open AccessHigh performance organic distributed Bragg reflector lasers fabricated by dot matrix holography
Author(s) -
Wenqiang Wan,
Wenbin Huang,
Donglin Pu,
Wen Qiao,
Yonghong Yan,
Guojun Wei,
Zongbao Fang,
Xin Zhou,
Linsen Chen
Publication year - 2015
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.031926
Subject(s) - distributed bragg reflector , materials science , lasing threshold , optics , laser , optoelectronics , distributed bragg reflector laser , holography , fiber bragg grating , optical cavity , wavelength , physics
We report distributed Bragg reflector (DBR) polymer lasers fabricated using dot matrix holography. Pairs of distributed Bragg reflector mirrors with variable mirror separations are fabricated and a novel energy transfer blend consisting of a blue-emitting conjugated polymer and a red-emitting one is spin-coated onto the patterned substrate to complete the device. Under optical pumping, the device emits sing-mode lasing around 622 nm with a bandwidth of 0.41 nm. The working threshold is as low as 13.5 μJ/cm² (~1.68 kW/cm²) and the measured slope efficiency reaches 5.2%. The distributed feedback (DFB) cavity and the DBR cavity resonate at the same lasing wavelength while the DFB laser shows a much higher threshold. We further show that flexible DBR lasers can be conveniently fabricated through the UV-imprinting technique by using the patterned silica substrate as the mold. Dot matrix holography represents a versatile approach to control the number, the size, the location and the orientation of DBR mirrors, thus providing great flexibility in designing DBR lasers.