Light-matter interaction of Exciton Polaritons at Telecommunication Wavelengths (LIEPOLATE)

电信波长下激子极化子的光与物质相互作用 (LIEPOLATE)

• 批准号: 192757433
• 负责人: Professor Dr. Martin Kamp
• 金额: --
• 依托单位: Institut of Physics
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/192757433?language=en
• 关键词: Light; matter; interaction; Exciton; Polaritons

This proposal targets the demonstration of an exciton-polariton laser in the 1.31 μm wavelength range. This will be enabled by the combination of novel dilute nitride materials grown on GaAs substrates in combination with established GaAs-based technology for the fabrication of high quality microcavity structures. Since dilute nitride quantum wells (QWs) enable emission in the telecommunication window around 1.31 μm (which is inaccessible with conventional nitrogen-free QWs on GaAs), this new approach will allow studies of the strong coupling of a QW exciton with a photonic mode of a microcavity at telecom wavelengths. After optimization of the dilute nitride QW quality, especially in terms of high structural homogeneity, reduced lateral composition fluctuations and carrier localization, these emitters will be incorporated into microcavities to drive this system into the strong-coupling regime. Here, hybridized quasi-particles called exciton-polaritons are formed. Exciton-polaritons can condense in the ground state if a critical population density is exceeded, and one observes the onset of so-called polariton lasing, which in contrast to photon lasers occurs without population inversion. This allows the realization of ultra-low threshold exciton-polariton laser devices at telecom wavelengths. In addition, the developments envisaged in this proposal will reveal new possibilities for studies of the fascinating properties related to exciton-polaritons, like e.g. superfluid phenomena, quantum phase transitions, logic devices, etc. at telecommunication wavelengths.

该提案的目标是演示 1.31 μm 波长范围内的激子偏振激光器。这将通过在 GaAs 衬底上生长的新型稀氮化物材料与用于制造高质量微腔结构的成熟 GaAs 技术相结合来实现。由于稀氮化物量子阱 (QW) 能够在 1.31 μm 左右的电信窗口内发射（这是 GaAs 上传统无氮 QW 无法达到的），因此这种新方法将允许研究 QW 激子与电信波长微腔光子模式的强耦合。在对稀氮化物量子阱质量进行优化后，特别是在高结构均匀性、减少横向成分波动和载流子局域化方面，这些发射极将被纳入微腔中，以驱动该系统进入强耦合状态。在这里，形成了称为激子极化激元的杂化准粒子。如果超过临界布居密度，激子极化激元可以在基态凝聚，并且可以观察到所谓的极化激元激光的开始，与光子激光器相比，这种激子激光在没有布居反转的情况下发生。这使得在电信波长下实现超低阈值激子偏振激光器件成为可能。此外，该提案中设想的发展将为研究与激子极化子相关的迷人特性提供新的可能性，例如电信波长的超流体现象、量子相变、逻辑器件等。

项目成果

Low dimensional GaAs/air vertical microcavity lasers

• DOI: 10.1063/1.4866805
• 发表时间: 2014-02
• 期刊: Applied Physics Letters
• 影响因子: 4
• 作者: J. Gessler;T. Steinl;A. Mika;J. Fischer;G. Sȩk;J. Misiewicz;S. Höfling;C. Schneider;M. Kamp

On the oscillator strength in dilute nitride quantum wells on GaAs

GaAs 上稀氮化物量子阱的振荡强度

• DOI: 10.1063/1.4729320
• 发表时间: 2012
• 期刊: Journal of Applied Physics
• 影响因子: 3.2
• 作者: K. Ryczko;G. Sek;J. Misiewicz;F. Langer;S. Höfling;M. Kamp
• 通讯作者: M. Kamp

Verification of band offsets and electron effective masses in GaAsN/GaAs quantum wells: Spectroscopic experiment versus 10-band k·p modeling

GaAsN/GaAs 量子阱中能带偏移和电子有效质量的验证：光谱实验与 10 能带 k·p 建模

• DOI: 10.1063/1.4810920
• 发表时间: 2013
• 期刊: Journal of Applied Physics
• 影响因子: 3.2
• 作者: K. Ryczko;G. Sęk;P. Sitarek;A. Mika;J. Misiewicz;F. Langer;S. Höfling;A. Forchel;M. Kamp
• 通讯作者: M. Kamp