Thermal annealing effect on organic semiconducting polymer laser with an external holographic grating feedback layer |
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| Affiliation: | 1. State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, China;2. University of Chinese Academy of Sciences, Beijing, 100049, China;3. Liquid Crystal Institute, Kent State University, OH, 44240, USA;1. Department of Electrical and Electronic Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan;2. State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, PR China;1. School of Materials Engineering, Yancheng Institute of Technology, Yancheng, 224051, PR China;2. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, PR China;3. College of Mechanical and Electrical Engineering, Yangtze Normal University, Chongqing, 408100, PR China;1. School of Electronic and Electrical Engineering, Sungkyunkwan University, Gyeonggi 16419, South Korea;2. Department of Electronic Engineering, Konkuk University, Seoul 143-701, South Korea;1. Advanced Energy and Electronic Materials Research Center, Dongguk University, 30 Pildong-ro, 1-gil, Jung-gu, Seoul 04620, Republic of Korea;2. Department of Energy and Materials Engineering, Dongguk University, 30 Pildong-ro, 1-gil, Jung-gu, Seoul 04620, Republic of Korea;3. Korea Atomic Energy Research Institute, Daedoek-daero 989-111, Yuseong-gu, Daejeon 34057, Republic of Korea |
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| Abstract: | Thermal annealing effect on an organic distributed feedback (DFB) laser excited from a semiconducting polymer gain layer, poly(2-methoxy-5-(2’-ethyl-hexyloxy)-p-phenyl-envinylene) (MEH-PPV), is reported. The morphology, absorption and photoluminescence (PL) spectral characteristics of the MEH-PPV film annealed at different temperatures were analyzed. The amplified spontaneous emission (ASE), the optical gain and loss coefficients were also investigated. The organic lasing behaviors including threshold, energy conversion efficiency and polarization state in a DFB laser device were studied. The results show that the optical properties of the organic semiconducting laser can be enhanced by thermal annealing effect. The single mode laser emission at 622.4 nm with lower lasing threshold 0.2 μJ/pulse and higher energy conversion efficiency 6.71% was achieved with thermal annealing at 120 °C. The thermal annealing treatment decreases laser threshold and increases laser energy conversion efficiency dramatically, which shows the potential in ultra-low cost organic semiconducting polymer DFB lasers. |
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| Keywords: | Annealing effect Organic semiconducting distributed feedback laser Amplified spontaneous emission Energy conversion efficiency |
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