High performance organic semiconductor lasers (OSLs), especially those under current injection, have been sought for decades due to their potentially great applications in fields such as spectroscopy, displays, medical devices, and optical interconnection. The design and fabrication of high-quality resonators is a prerequisite for high performance OSLs. In the case of planar microcavities, the fabrication process of top distributed Bragg reflectors (DBRs) usually requires electron beam evaporation or manual lamination on top of organic thin-film layers, which can lead to issues including degradation of the organic materials, large-scale non-uniformity, and difficulties for current injection. Here, we report a non-destructive way of fabricating a top DBR by thermal evaporation. The top DBR based on thermally evaporated alternative TeOx/LiF stacks shows low morphological roughness, high process tolerance, and high reflectivity. Moreover, the deposition process causes negligible damage to the organic thin-film layers underneath. With the combination of a conventional e-beam evaporated bottom DBR, a high performance planar microcavity OSL with a low threshold of 1.7 μJ cm−2, an emission linewidth of 0.24 nm, and an angular divergence of <3° has been achieved under nitrogen laser pumping. Similar performance, with a high Gaussian beam quality comparable with that of an ideal diffraction-limited beam, was also obtained under diode pumping, showing the potential of this technique for building compact and cost-effective organic lasers with good beam quality. Our result will open a promising route for future high performance microcavity optoelectronic devices, especially for laser devices under current injection.
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12 October 2020
Research Article|
October 13 2020
High performance planar microcavity organic semiconductor lasers based on thermally evaporated top distributed Bragg reflector
Yongsheng Hu
;
Yongsheng Hu
1
State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences
, Changchun 130033, China
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Fatima Bencheikh
;
Fatima Bencheikh
a)
2
Center for Organic Photonics and Electronics Research (OPERA), Kyushu University
, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
3
Japan Science and Technology Agency (JST), ERATO, Adachi Molecular Exciton Engineering Project
, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
a)Authors to whom correspondence should be addressed: [email protected]; [email protected]; and [email protected]
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Sébastien Chénais
;
Sébastien Chénais
3
Japan Science and Technology Agency (JST), ERATO, Adachi Molecular Exciton Engineering Project
, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
4
Laboratoire de Physique des Lasers (LPL), Université Sorbonne Paris Nord
, CNRS, UMR 7538, Villetaneuse F-93430, France
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Sébastien Forget
;
Sébastien Forget
3
Japan Science and Technology Agency (JST), ERATO, Adachi Molecular Exciton Engineering Project
, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
4
Laboratoire de Physique des Lasers (LPL), Université Sorbonne Paris Nord
, CNRS, UMR 7538, Villetaneuse F-93430, France
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Xingyuan Liu
;
Xingyuan Liu
a)
1
State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences
, Changchun 130033, China
a)Authors to whom correspondence should be addressed: [email protected]; [email protected]; and [email protected]
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Chihaya Adachi
Chihaya Adachi
a)
2
Center for Organic Photonics and Electronics Research (OPERA), Kyushu University
, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
3
Japan Science and Technology Agency (JST), ERATO, Adachi Molecular Exciton Engineering Project
, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
5
International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University
, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
a)Authors to whom correspondence should be addressed: [email protected]; [email protected]; and [email protected]
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Yongsheng Hu
1
Fatima Bencheikh
2,3,a)
Sébastien Chénais
3,4
Sébastien Forget
3,4
Xingyuan Liu
1,a)
Chihaya Adachi
2,3,5,a)
1
State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences
, Changchun 130033, China
2
Center for Organic Photonics and Electronics Research (OPERA), Kyushu University
, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
3
Japan Science and Technology Agency (JST), ERATO, Adachi Molecular Exciton Engineering Project
, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
4
Laboratoire de Physique des Lasers (LPL), Université Sorbonne Paris Nord
, CNRS, UMR 7538, Villetaneuse F-93430, France
5
International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University
, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
a)Authors to whom correspondence should be addressed: [email protected]; [email protected]; and [email protected]
Appl. Phys. Lett. 117, 153301 (2020)
Article history
Received:
June 02 2020
Accepted:
August 30 2020
Citation
Yongsheng Hu, Fatima Bencheikh, Sébastien Chénais, Sébastien Forget, Xingyuan Liu, Chihaya Adachi; High performance planar microcavity organic semiconductor lasers based on thermally evaporated top distributed Bragg reflector. Appl. Phys. Lett. 12 October 2020; 117 (15): 153301. https://doi.org/10.1063/5.0016052
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