A strip-loaded horizontal slot waveguide is used for routing the emission of a microdisk laser. The active region of the laser contains InAs/InGaAs/GaAs quantum dots operating in CW mode under optical pumping. Although the quantum dots emit in a broad range, the laser emission is single mode with $\lambda = 1290\;\text{nm}$. Atomic layer deposition is used for the fabrication of the ${\text{TiO}_2}/{\text{SiO}_2}/{\text{TiO}_2}$ slot waveguide covering the 10-µm-diameter disk. The horizontal slot waveguide covers the microdisk and traps the emission in the fundamental TM mode of the three-stack layer. Once light is localized inside this planar waveguide, a loading strip creates an effective index difference, which is sufficient to confine the mode laterally and leads to the guiding of the lasing emission. An analytical model for the five-layer horizontal planar slot waveguide was developed in order to optimize the slot waveguide according to the operation wavelength of the microlaser and the different materials involved. Scanning near-field optical microscopy is used to observe the propagation of light within the waveguide and confirm the mode coupling into it and therefore the guiding along the loading strip.

中文翻译：

---

带状加载的水平缝隙波导，用于路由微盘激光发射

带状负载的水平缝隙波导用于路由微盘激光器的发射。激光器的有源区包含InAs / InGaAs / GaAs量子点，在光泵浦下以CW模式工作。尽管量子点的发射范围很广，但是激光发射是单模的，\\ lambda = 1290 \; \ text {nm} $。原子层沉积用于制造$ {\ text {TiO} _2} / {\ text {SiO} _2} / {\ text {TiO} _2} $缝隙波导，覆盖直径10 µm的磁盘。水平缝隙波导覆盖微盘并以三叠层的基本TM模式捕获发射。一旦将光定位在该平面波导内部，加载条就会产生有效的折射率差，该折射率差足以横向限制模态并导致引导激光发射。建立了一个五层水平平面缝隙波导的分析模型，以便根据微激光器的工作波长和所涉及的不同材料来优化缝隙波导。扫描近场光学显微镜用于观察光在波导中的传播，并确认耦合到其中的模式，从而确认沿着加载条的引导。