基于多路径正反馈机制的零折射率超材料高效纳米激光器
TB39; 对于传统的Fabry-Perot腔激光器,光子在增益介质中沿任意方向传播.在腔内,只有沿着腔的轴线来回震荡的光子,达到一定的阈值后可以产生激射效应.然而,对于入射方向偏离反射镜腔壁的光子将从腔中耗散出去,从而使得激射效率较低.为了解决上述激光器所面临的缺陷,利用等效折射率为负1的负折射材料和零折射率材料组成一个双层结构作为Fabry-Pérot腔壁.对于此腔,以不同路径入射于腔壁的光子,都可以重新汇聚到原子所在的位置.经过多次正反馈,最终以垂直于腔壁的方向辐射出去,避免了光子在偏离激射方向上的耗散.此外,该腔的聚焦效应与准直效应与原子位置无关.随后,通过二维光子晶体分别实现了由0与...
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| Published in | 红外与毫米波学报 Vol. 42; no. 1; pp. 72 - 77 |
|---|---|
| Main Authors | , , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
铁道警察学院 刑事科学技术系,河南 郑州 450053
2023
山西大同大学 微结构电磁功能材料山西省重点实验室,山西 大同 037009%山西大同大学 微结构电磁功能材料山西省重点实验室,山西 大同 037009%同济大学 物理科学与工程学院,上海 200092 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-9014 |
| DOI | 10.11972/j.issn.1001-9014.2023.01.010 |
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| Abstract | TB39; 对于传统的Fabry-Perot腔激光器,光子在增益介质中沿任意方向传播.在腔内,只有沿着腔的轴线来回震荡的光子,达到一定的阈值后可以产生激射效应.然而,对于入射方向偏离反射镜腔壁的光子将从腔中耗散出去,从而使得激射效率较低.为了解决上述激光器所面临的缺陷,利用等效折射率为负1的负折射材料和零折射率材料组成一个双层结构作为Fabry-Pérot腔壁.对于此腔,以不同路径入射于腔壁的光子,都可以重新汇聚到原子所在的位置.经过多次正反馈,最终以垂直于腔壁的方向辐射出去,避免了光子在偏离激射方向上的耗散.此外,该腔的聚焦效应与准直效应与原子位置无关.随后,通过二维光子晶体分别实现了由0与-1等效折射率光子晶体组成的反射壁,当在腔中引入增益材料时,可以观察到明显的激射行为.与单个零折射率材料构成的腔相比,该腔的阈值更低,发射强度更大,从而提高了激射的效率. |
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| AbstractList | TB39; 对于传统的Fabry-Perot腔激光器,光子在增益介质中沿任意方向传播.在腔内,只有沿着腔的轴线来回震荡的光子,达到一定的阈值后可以产生激射效应.然而,对于入射方向偏离反射镜腔壁的光子将从腔中耗散出去,从而使得激射效率较低.为了解决上述激光器所面临的缺陷,利用等效折射率为负1的负折射材料和零折射率材料组成一个双层结构作为Fabry-Pérot腔壁.对于此腔,以不同路径入射于腔壁的光子,都可以重新汇聚到原子所在的位置.经过多次正反馈,最终以垂直于腔壁的方向辐射出去,避免了光子在偏离激射方向上的耗散.此外,该腔的聚焦效应与准直效应与原子位置无关.随后,通过二维光子晶体分别实现了由0与-1等效折射率光子晶体组成的反射壁,当在腔中引入增益材料时,可以观察到明显的激射行为.与单个零折射率材料构成的腔相比,该腔的阈值更低,发射强度更大,从而提高了激射的效率. |
| Abstract_FL | For the traditional Fabry-Perot cavity laser, the field perpendicular to cavity wall will be resonantly en? hanced until it breaks with the threshold and escapes out of the cavity, while the field emitted obliquely dissipates outside the cavity leading to the low efficiency. Here a high-efficiency laser cavity is proposed resorting to meta? materials. Based on the multipath positive feedback mechanism, the photons emitted form atoms in any direction can only leak out of the cavity along one direction and no photons run out of the cavity which showed potential for improving the efficiency. Furthermore, this combination of cavity is almost independent of atom position. In ad? dition, we designed a realistic dielectric micro-structure system made of two-dimensional photonic crystals to con? firm our proposal. When the gain medium is introduced into the system, the cavity can provide both a lower las? ing threshold and a higher maximum emission intensity, compared with the individual zero-index materials cavi? ty, demonstrating improved lasing efficiency. |
| Author | 孙勇 陈鸿 张振清 邓富胜 李云辉 许静平 董丽娟 |
| AuthorAffiliation | 铁道警察学院 刑事科学技术系,河南 郑州 450053;山西大同大学 微结构电磁功能材料山西省重点实验室,山西 大同 037009%山西大同大学 微结构电磁功能材料山西省重点实验室,山西 大同 037009%同济大学 物理科学与工程学院,上海 200092 |
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| Author_FL | DENG Fu-Sheng LI Yun-Hui XU Jing-Ping CHEN Hong SUN Yong ZHANG Zhen-Qing DONG Li-Juan |
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| DocumentTitle_FL | High-efficiency nano laser based on multipath positive feedback mechanism of matching zero-index metamaterials |
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| Keywords | 多路径正反馈机制 激射效应 零折射率超材料 multipath positive feedback lasing effect zero-index metamaterials |
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| Publisher | 铁道警察学院 刑事科学技术系,河南 郑州 450053 山西大同大学 微结构电磁功能材料山西省重点实验室,山西 大同 037009%山西大同大学 微结构电磁功能材料山西省重点实验室,山西 大同 037009%同济大学 物理科学与工程学院,上海 200092 |
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| Title | 基于多路径正反馈机制的零折射率超材料高效纳米激光器 |
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