Organic DAST Single Crystal Meta-Cavity Resonances
at Terahertz Frequencies
Version 2 2019-07-05, 18:37
Version 1 2019-07-05, 18:36
Posted on 2019-07-05 - 18:37
Light–matter coupling in the
terahertz (THz) regime is an
important asset for future THz lasing, sensing, and quantum technologies,
but it was previously realized in complex inorganic microcavities
at cryogenic temperatures. Here we report on a simple organic meta-cavity
formed with a patch-antenna array on an organic 4-N,N-dimethylamino-4′-N′-methyl-stilbazolium
tosylate (DAST) single crystal, and particularly, the resultant observation
of resonances and Rabi splitting in the THz regime. This is resulted
from the coupling between two oscillators: a DAST optical phonon mode
and the patch-antenna array meta-cavity. The birefringence of the
DAST single crystal manifests itself in a polarization dependent response
of the geometrically symmetric structure, with which the resonance
of the cavity can be tuned close to that of DAST. A large Rabi splitting
of 0.28 THz, corresponding to 25% of the DAST resonant absorption
frequency, was experimentally measured at room temperature. Besides
the incident polarization angle, the coupling can also be tuned by
the operating temperature. This work presents the first experimental
realization of room temperature coupling Rabi splitting in an organic
single crystal at THz frequencies, opening up a promising organic
avenue toward otherwise unattainable performance and inspiring the
development of new organic THz devices.
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Fan, Kai; Xu, Xiangdong; Gu, Yu; Dai, Zelin; Cheng, Xiaomeng; Zhou, Jun; et al. (2019). Organic DAST Single Crystal Meta-Cavity Resonances
at Terahertz Frequencies. ACS Publications. Collection. https://doi.org/10.1021/acsphotonics.9b00005
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AUTHORS (9)
KF
Kai Fan
XX
Xiangdong Xu
YG
Yu Gu
ZD
Zelin Dai
XC
Xiaomeng Cheng
JZ
Jun Zhou
YJ
Yadong Jiang
TF
Ting Fan
JX
Jimmy Xu