Open AccessAnisotropic light-matter coupling and below-threshold excitation dynamics in an organic crystal microcavity
Author(s) -
Tomoya Tagami,
Yusuke Ueda,
Kenichi Imai,
Shun Takahashi,
Hitoshi Mizuno,
Hisao Yanagi,
Takeshi Obuchi,
Masaaki Nakayama,
Ken Yamashita
Publication year - 2021
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.425461
Subject(s) - polariton , anisotropy , materials science , photoluminescence , coupling (piping) , optoelectronics , photonics , excitation , photonic crystal , phase transition , organic semiconductor , condensed matter physics , optics , physics , quantum mechanics , metallurgy
Organic semiconductors are promising candidates as platforms for room temperature polaritonic devices. An issue for practical implementation of organic polariton devices is the lowering of condensation threshold. Here we investigate anisotropic light-matter coupling characteristics in an organic crystal microcavity showing strong molecular orientation. Furthermore, the below-threshold excitation dynamics are investigated to clarify the spontaneous transition pathways from reservoir to polariton states. Time-resolved photoluminescence measurements reveal that photonic/excitonic hybrid transition processes coexist in the microcavity system. This finding provides valuable insights into a detailed understanding of polariton dynamics and help in the design of polaritonic devices showing a low-threshold condensed phase.