Optically Pumped Lasing Based on Vibrationally Dressed Exciton Polaritons in a Single-Crystal Molecular Cavity at Room Temperature,ACS Photonics

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Optically Pumped Lasing Based on Vibrationally Dressed Exciton Polaritons in a Single-Crystal Molecular Cavity at Room Temperature
ACS Photonics ( IF 6.5 ) Pub Date : 2022-05-23 , DOI: 10.1021/acsphotonics.2c00123
Takumi Matsuo ₁ , Yusuke Ueda ₂ , Hitoshi Mizuno ₃ , Fumio Sasaki ₄ , Kenichi Yamashita ₂ , Hisao Yanagi ₃

Affiliation

Polaritonic photonics is one of the key technologies for future quantum-based information and communication. Here, we demonstrate strong evidence of vibrationally dressed exciton polaritons formed in a single-crystal planar cavity of 5,5″-bis(biphenylyl)-2,2′:5′,2″-terthiophene (BP3T) at room temperature. Under optical pumping, the BP3T crystals exhibit longitudinal multimode lasing at the primary and secondary vibronic progression bands based on Fabry–Pérot (F-P) resonation between side facets of the planar cavity. Each gain-narrowed vibronic band extraordinarily split into multiple peaks at excitation fluence around the lasing threshold, accompanied with time delay up to several tens of picoseconds, which is unexplainable for conventional photon lasing. Although those lasing characteristics are primarily interpreted as a regime of exciton-polaritons (EPs), the energy versus wavenumber plots of splitting spectra are well-explained by coupling with cooperative vibrations of the ordered BP3T molecules.

中文翻译：

室温下单晶分子腔中基于振动穿戴激子极化子的光泵浦激光

极化光子学是未来基于量子的信息和通信的关键技术之一。在这里，我们展示了在室温下在 5,5"-双(联苯基)-2,2':5',2"-三噻吩 (BP3T) 的单晶平面腔中形成振动修饰激子极化子的有力证据。在光泵浦下，基于平面腔侧面之间的法布里-珀罗 (FP) 共振，BP3T 晶体在初级和次级振动进展带上表现出纵向多模激光。每个增益变窄的振动带在激光阈值附近的激发通量处异常分裂成多个峰值，并伴有长达几十皮秒的时间延迟，这对于传统的光子激光来说是无法解释的。

更新日期：2022-05-23

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