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Ultrastrong Coupling of Electrically Pumped Near‐Infrared Exciton‐Polaritons in High Mobility Polymers
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2017-12-28 , DOI: 10.1002/adom.201700962 Martin Held 1 , Arko Graf 1 , Yuriy Zakharko 1 , Pengning Chao 2 , Laura Tropf 3 , Malte C. Gather 3 , Jana Zaumseil 1
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2017-12-28 , DOI: 10.1002/adom.201700962 Martin Held 1 , Arko Graf 1 , Yuriy Zakharko 1 , Pengning Chao 2 , Laura Tropf 3 , Malte C. Gather 3 , Jana Zaumseil 1
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Exciton‐polaritons are quasiparticles with hybrid light–matter properties that may be used in new optoelectronic devices. Here, electrically pumped ultrastrongly coupled exciton‐polaritons in a high‐mobility donor–acceptor copolymer are demonstrated by integrating a light‐emitting field‐effect transistor into a metal‐clad microcavity. Near‐infrared electroluminescence is emitted exclusively from the lower polariton branch, which indicates efficient relaxation. A coupling strength of 24% of the exciton transition energy implies the system is in the ultrastrong coupling regime with a narrow and almost angle‐independent emission. The lower polariton energy, which can be adjusted by the cavity detuning, strongly influences the external quantum efficiency of the device. Driving the transistors at ambipolar current densities of up to 4000 A cm−2 does not decrease the coupling strength or polariton emission efficiency. Cavity‐integrated light‐emitting field‐effect transistors thus represent a versatile platform for polariton emission and polaritonic devices.
中文翻译：
高迁移率聚合物中电泵浦近红外激子-极化子的超强耦合
激子极化子是具有混合光物质特性的准粒子，可用于新的光电设备中。在此，通过将发光的场效应晶体管集成到金属包覆的微腔中，演示了高迁移率供体-受体共聚物中的电泵激超强耦合激子-极化子。近红外电致发光仅从下部极化子分支发出，这表明有效的弛豫。激子跃迁能量的24％的耦合强度意味着该系统处于超强耦合状态，具有狭窄且几乎与角度无关的发射。可通过腔失谐调整的较低极化子能量会极大地影响器件的外部量子效率。以高达4000 A cm的双极性电流密度驱动晶体管− 2不会降低耦合强度或极化子发射效率。因此，腔集成发光场效应晶体管代表了极化子发射和极化子设备的通用平台。
更新日期：2017-12-28
中文翻译：
高迁移率聚合物中电泵浦近红外激子-极化子的超强耦合
激子极化子是具有混合光物质特性的准粒子，可用于新的光电设备中。在此，通过将发光的场效应晶体管集成到金属包覆的微腔中，演示了高迁移率供体-受体共聚物中的电泵激超强耦合激子-极化子。近红外电致发光仅从下部极化子分支发出，这表明有效的弛豫。激子跃迁能量的24％的耦合强度意味着该系统处于超强耦合状态，具有狭窄且几乎与角度无关的发射。可通过腔失谐调整的较低极化子能量会极大地影响器件的外部量子效率。以高达4000 A cm的双极性电流密度驱动晶体管− 2不会降低耦合强度或极化子发射效率。因此，腔集成发光场效应晶体管代表了极化子发射和极化子设备的通用平台。
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