Subwavelength grating as both emission mirror and electrical contact for VCSELs in any material system.
Subwavelength grating as both emission mirror and electrical contact for VCSELs in any material system.
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DOI：
10.1038/srep40348
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发表时间：
2017-01-12
影响因子：
4.6
通讯作者：
Panajotov K
中科院分区：
文献类型：
--
作者：
Czyszanowski T;Gebski M;Dems M;Wasiak M;Sarzała R;Panajotov K
半导体金属亚波长光栅 (SMSG) 在垂直腔表面发射激光器 (VCSEL) 中具有双重用途，既可用作光耦合器，也可用作电流注入器。 SMSG 提供光学和横向电流限制，无需环形触点以及横向内置光学和电流限制，从而可以在任意大的表面上实施。使用 SMSG 作为顶镜可以使用任何类型的半导体晶体制造单片 VCSEL。与传统的 VCSEL 相比，采用 SMSG 构建 VCSEL 所需的 p 型材料要少得多。在本文中，我们使用三维全矢量光学模型，分析了多种半导体材料中在较宽波长范围内的独立 SMSG 的特性。然后，我们将光学模型与热学和电学数值模型相结合，对示例性 SMSG VCSEL 的阈值操作进行仿真。
Semiconductor-metal subwavelength grating (SMSG) can serve a dual purpose in vertical-cavity surface-emitting lasers (VCSELs), as both optical coupler and current injector. SMSGs provide optical as well as lateral current confinement, eliminating the need for ring contacts and lateral build-in optical and current confinement, allowing their implementation on arbitrarily large surfaces. Using an SMSG as the top mirror enables fabrication of monolithic VCSELs from any type of semiconductor crystal. The construction of VCSELs with SMSGs requires significantly less p-type material, in comparison to conventional VCSELs. In this paper, using a three-dimensional, fully vectorial optical model, we analyse the properties of the stand-alone SMSG in a number of semiconductor materials for a broad range of wavelengths. Integrating the optical model with thermal and electrical numerical models, we then simulate the threshold operation of an exemplary SMSG VCSEL.