大型双光子截面和低值多光子激光对CdS/CdSe/CdS量子的激光
Benjamin T Diroll1, James P Cassidy2, Dulanjan Harankahage2
1Center for Nanoscale Materials, Argonne National Laboratory, 9700 S. Cass Avenue, Lemont, Illinois 60439, USA. bdiroll@anl.gov.
Nanoscale
|November 8, 2023
概括
体量子外具有很大的两光子吸收和长 biexciton寿命,使它们对上转换成像和高效增益介质有希望. 这些特性使得量子外固体中的低值放大自发发射和激光成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 量子光学是一种量子光学.
- 纳米技术 纳米技术
背景情况:
- 体量子外是球形半导体量子井,具有光学应用的潜力.
- 多刺激子物理对于先进的光学实验至关重要.
研究的目的:
- 研究CdS/CdSe/CdS量子的两光子特性.
- 展示他们对upconversion成像和获取媒体的潜力.
主要方法:
- 两个光子吸收截面的表征.
- 时间解析的测量 biexciton 寿命和增益带宽.
主要成果:
- 大的两光子截面 (0.4-7.9 × 10^6 GM).
- 长 biexciton 寿命 (>10 ns) 和宽增益带宽 (>300 meV).
- 放大自发发射和激光的低值 (低至1mJ cm^-2).
结论:
- CdS/CdSe/CdS量子是两个光子激发的优秀增益介质.
- 它们的特性支持多模式放大自发发射.
- 量子外固体与其他体材料相比,具有竞争力或优越的性能.
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