Proposal and numerical study on capsule-shaped nanometallic semiconductor lasers
Proposal and numerical study on capsule-shaped nanometallic semiconductor lasers
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DOI：
10.7567/jjap.53.112703
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发表时间：
2014-11
影响因子：
1.5
通讯作者：
Baifu Zhang;T. Okimoto;Takuo Tanemura;Y. Nakano
中科院分区：
文献类型：
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作者：
Baifu Zhang;T. Okimoto;Takuo Tanemura;Y. Nakano
提出了一种新型的亚波长金属InP/InGaAs激光器。通过在两端引入弯曲的金属腔面，谐振模可以被强烈地限制在腔的中心内，这不仅提高了限制因子和Q因子，而且减小了腔体积。作为一个例子，我们数值计算表明，所提出的结构可以降低等离子体损耗，提高Q因子从197到297，并降低阈值电流从291到60 μA与0.45 μm3的有效模式体积。此外，我们证明了存在一个最佳的结构的胶囊形腔，以最小化的电流阈值。
We propose a novel subwavelength metallic InP/InGaAs laser with a capsule-shaped cavity. By introducing curved metallic facets at the both ends, resonant modes can be strongly confined inside the center of the cavity, which not only improves the confinement factor and the Q factor, but also reduces the cavity volume. As an example case, we numerically demonstrate that the proposed structure can decrease the plasmonic loss and improve the Q factor from 197 to 297 and reduce the threshold current from 291 to 60 µA with the effective modal volume of 0.45 µm3. In addition, we demonstrate that there exists an optimal structure of the capsule-shaped cavity to minimize the current threshold.