We design and experimentally demonstrate the propagation loss of waveguides and the operation of a single-step etched polarization rotator-splitter (PRS) in low index contrast InGaAs-InP material system at 6.15 μm. Propagation losses 4.19 dB/cm for TM mode and 3.25 dB/cm for TE mode are measured. The designed PRS can achieve near 100% conversion efficiency. This study enables the possibility of monolithic integration of quantum cascade devices with TM-polarized characteristics and TE-guiding two-dimensional slotted photonic crystal waveguide gas sensors for on-chip monolithic absorption spectroscopy.
展开▼
机译：我们设计和实验证明了波导的传播损耗以及低指数的单步蚀刻偏振旋转器分离器（PRS）的操作在6.15μm处的InGaAs-InP材料系统。测量TM模式的传播损耗4.19 db / cm，测量TM模式的3.25dB / cm。设计的PRS可以实现接近100％的转换效率。该研究使得具有用于片上单片吸收光谱的TM偏振特性和TE引导二维槽光晶体波导气体传感器的量子级联装置的单片集成。
展开▼
