Haas Julian, Catalán Ernesto Vargas, Piron Pierre, Nikolajeff Fredrik, Österlund Lars, Karlsson Mikael, Mizaikoff Boris
Institute of Analytical and Bioanalytical Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany.
Department of Engineering Sciences, Uppsala University, Box 534, SE-75121 Uppsala, Sweden.
ACS Omega. 2018 Jun 8;3(6):6190-6198. doi: 10.1021/acsomega.8b00623. eCollection 2018 Jun 30.
Photonic design and optimization of thin-film polycrystalline diamond waveguides are shown, serving as advanced evanescent field transducers in the mid-infrared fingerprint regime (2000-909 cm; 5-11 μm). Design constraints inherent to optical/system considerations and the material were implemented in a finite element method (FEM)-based simulation method that allowed three-dimensional modeling of the overall structure. Thus, lateral mode confinement, attenuation in the direction of radiation propagation, and physical resilience were evaluated. In a final step, the designed structures were fabricated, and their utility in combination with a broadly tunable external cavity quantum cascade laser for chemical sensing of a liquid phase analyte was demonstrated.
展示了薄膜多晶金刚石波导的光子学设计与优化，其在中红外指纹区（2000 - 909厘米⁻¹；5 - 11微米）作为先进的倏逝场传感器。光学/系统考虑因素以及材料固有的设计约束通过基于有限元方法（FEM）的模拟方法得以实现，该方法允许对整体结构进行三维建模。由此，评估了横向模式限制、辐射传播方向上的衰减以及物理弹性。在最后一步，制造了所设计的结构，并展示了它们与宽可调外腔量子级联激光器结合用于液相分析物化学传感的效用。
