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Electrical control of the distributed feedback organic semiconductor laser based on holographic polymer dispersed liquid crystal grating
Affiliation:1. Deakin University, IMPACT Strategic Research Centre, School of Medicine, Geelong, Australia;2. Institute of Health and Ageing, Australian Catholic University, Melbourne, Australia;3. Melbourne Medical School-Western Campus, Faculty of Medicine, Dentistry & Health Sciences, University of Melbourne, Melbourne, Australia;4. Department of Psychiatry, University of Melbourne, Melbourne, Australia;5. Orygen, the National Centre of Excellence in Youth Mental Health, Melbourne, Australia & Centre for Youth Mental Health, The University of Melbourne, Melbourne, Australia;6. Barwon Health and the Geelong Clinic, Swanston Centre, Geelong, Australia;7. Florey Institute for Neuroscience and Mental Health, Melbourne, Melbourne, Australia;8. Institute of Clinical Medicine, Psychiatry, University of Eastern Finland (UEF), Kuopio, Finland;9. Departments of Psychiatry, Kuopio University Hospital, Kuopio; South-Savonia Hospital District, Mikkeli; North Karelia Central Hospital, Joensuu; SOSTERI, Savonlinna; SOTE, Iisalmi; Lapland Hospital District, Rovaniemi, Finland;10. Clinic of Child Psychiatry, University Hospital of Oulu, Oulu, Finland;11. School of Medicine, Deakin University, Geelong, Australia;12. School of Medicine, Faculty of Health Sciences, UEF, Kuopio, Finland;13. Bone and Cartilage Research Unit, Surgery, Institute of Clinical Medicine, UEF, Kuopio, Finland;1. Department of Physics and Astronomy, and Institute of Applied Physics, Seoul National University, Seoul 08826, South Korea;2. Jeonju Center, Korea Basic Science Institute, Jeonju, Jeollabuk-do 54907, South Korea;1. Department of Physics, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan;2. Institute of Materials Structure Science, KEK, 1-1 Oho, Tsukuba, Ibaraki, 305-0801, Japan;3. SOKENDAI (The Graduate University for Advanced Studies), 1-1 Oho, Tsukuba, Ibaraki, 305-0801, Japan;1. Department of Electrical and Computer Engineering, University of Waterloo, ON, Canada N2L 3G1;2. Department of Electrical and Computer Engineering, University of Alberta, AB, Canada T6G 2G8;3. Department of Biology, University of Waterloo, ON, Canada N2L 3G1;4. Teledyne DALSA Semiconductor, 18, boul. de l’Aeroport, Bromont, QC, Canada J2L 1S7;1. School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, PR China;2. Department of Physics, Jining University, Qufu 273155, PR China;1. College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China;2. Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, PR China;3. Department of Physics, Hamline University, St. Paul, 55104, USA
Abstract:In this paper, we demonstrate the electrical control of the distributed feedback (DFB) organic semiconductor laser based on a holographic polymer dispersed liquid crystal (HPDLC) grating for the first time. The grating is fabricated on the top of the organic semiconductor film to act as an external feedback structure. Experimental results show that the lasing intensity can be decreased by increasing the external electric field, and the lasing wavelength exhibits a slight blue-shift of 1.4 nm during the modulation process, indicating a good stability. The modulated performances are attributed to the decreases in the refractive index modulation and average refractive index of the HPDLC grating respectively as a result of the field-induced liquid crystal reorientation. This study provides some new ideas for the improvement of DFB organic semiconductor laser to enable envisioned applications in laser displays and integrated photonic circuits.
Keywords:Electrical control  Organic semiconductor laser  Holographic polymer dispersed liquid crystal grating
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