Open AccessWaveguiding and Lasing in 2D Organic Semiconductor Znq 2
Author(s) -
Lin Shenghuang,
Li Tenghao,
Yuan Jian,
Liao Liangsheng,
Tao Jin,
Kan Ruifeng,
Xu Xuhui,
Bao Qiaoliang
Publication year - 2021
Publication title -
advanced photonics research
Language(s) - English
Resource type - Journals
ISSN - 2699-9293
DOI - 10.1002/adpr.202000057
Subject(s) - lasing threshold , optoelectronics , photonics , materials science , semiconductor , organic semiconductor , laser , semiconductor laser theory , gain switching , quantum well , optics , physics , wavelength
Organic semiconductors have been proven as emerging platforms for exploring strong light–matter interactions and quantum optics so as to develop coherent and quantum photonic devices. Though there has been abundant research on organic semiconductors, lasing action is rarely reported in individual 2D organic semiconductor waveguides or nanocavities. Herein, a strong optical waveguiding phenomenon is observed not only in the individual 2D organic semiconductor Znq 2 nanosheet with micrometer size area, but also in the interconnecting or neighboring Znq 2 nanosheets. The optical propagation loss coefficient of the interconnecting Znq 2 sheets is ≈800 dB cm −1 . More importantly, the phenomenon of optically pumped lasing in 2D Znq 2 nanosheets is demonstrated, as evidenced by a sudden increase in emission intensity at a threshold pump pulse fluence of 49.9 W cm −2 at 480 nm. As verified by numerical FDTD simulations, the Znq 2 nanosheet constitutes a microcavity that supports whisper gallery mode, providing suffcient feedback for laser oscillations. Herein, the coexistence of low‐loss waveguiding and excellent lasing in 2D organic semiconductor nanosheets are revealed, which open up a new pathway for photonics and quantum optics based on 2D organic semiconductors.