Open AccessChanges in optical characteristics induced by polymer blending in printed colloidal quantum dots microlasers
Author(s) -
Lei Wan,
Cong Chen,
Jiawei Zhu,
K T Abdul Nasir,
Qingyu Cui,
Zhenshi Chen,
Hiroaki Yoshioka,
Weiping Liu,
Yuji Oki,
Zhaohui Li
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.019615
Subject(s) - lasing threshold , materials science , quantum dot , polystyrene , optoelectronics , polymer , photonics , laser , optics , quantum dot laser , wavelength , nanotechnology , semiconductor laser theory , semiconductor , composite material , physics
On-chip microlasers are desirable to meet the different control requirements and unique demands in different application scenarios. In this work, we obtained the on-chip microlaser by printing pixelated CdSe/ZnS colloidal quantum dots (CQDs), incorporating the quantum dot self-assembly mechanism and the external cavity-free configuration. The spectral purity of the microlaser can be significantly improved by slightly blending polymer into the CQD matrix. The quasitoroid profile was gradually changed to microdisks as the polystyrene (PS) concentration increased from 0 wt.% to 10 wt.%. Specially, when the PS solution varied from 0 wt.% to 1 wt.%, the lasing threshold of 1.4 μJ/mm 2 was increased up to 14 μJ/mm 2 , meanwhile the emission wavelength range showed a 25 nm blue-shift approximately. The easy printing technologies and the low-cost polymer blending method employed in the obtained microlasers will further facilitate the development of printing photonics and electronics, especially in the high-performance microlaser displays and high-precision sensors.