Advanced mid-infrared plasmonic waveguides for on-chip integrated photonics

作     者：MAURO DAVID DAVIDE DISNAN ELENA ARIGLIANI ANNA LARDSCHNEIDER GEORG MARSCHICK HANH T.HOANG HERMANN DETZ BERNHARD LENDL ULRICH SCHMID GOTTFRIED STRASSER BORISLAV HINKOV MAURO DAVID;DAVIDE DISNAN;ELENA ARIGLIANI;ANNA LARDSCHNEIDER;GEORG MARSCHICK;HANH T.HOANG;HERMANN DETZ;BERNHARD LENDL;ULRICH SCHMID;GOTTFRIED STRASSER;BORISLAV HINKOV

作者机构：Institute of Solid State Electronics and Center for Micro-and NanostructuresTU WienViennaAustria Institute of Sensor and Actuator SystemsTU WienViennaAustria Central European Institute of TechnologyBrno University of TechnologyBrnoCzech Republic Institute of Chemical Technologies and AnalyticsViennaAustria 

出 版 物：《Photonics Research》 (光子学研究（英文版）)

年 卷 期：2023年第11卷第10期

页      面：1694-1702页

核心收录：

学科分类：080901[工学-物理电子学] 070207[理学-光学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：Horizon 2020 Framework Programme (780240,828893) Austrian Science Fund (M2485-N34) MEYS CR(LM2018110) 

主　　题：waveguides transparency straight 

摘      要：Long-wave infrared(LWIR, 8–14 μm) photonics is a rapidly growing research field within the mid-IR with applications in molecular spectroscopy and optical free-space communication. LWIR applications are often addressed using rather bulky tabletop-sized free-space optical systems, preventing advanced photonic applications,such as rapid-time-scale experiments. Here, device miniaturization into photonic integrated circuits(PICs) with maintained optical capabilities is key to revolutionize mid-IR photonics. Subwavelength mode confinement in plasmonic structures enabled such miniaturization approaches in the visible-to-near-IR spectral range. However,adopting plasmonics for the LWIR needs suitable low-loss and-dispersion materials with compatible integration strategies to existing mid-IR technology. In this paper, we further unlock the field of LWIR/mid-IR PICs by combining photolithographic patterning of organic polymers with dielectric-loaded surface plasmon polariton(DLSPP) waveguides. In particular, polyethylene shows favorable optical properties, including low refractive index and broad transparency between ~2 μm and 200 μm. We investigate the whole value chain, including design, fabrication, and characterization of polyethylene-based DLSPP waveguides and demonstrate their first-time plasmonic operation and mode guiding capabilities along S-bend structures. Low bending losses of ~1.3 d B and straight-section propagation lengths of ~1 mm, pave the way for unprecedented complex on-chip mid-IR photonic devices. Moreover, DLSPPs allow full control of the mode parameters(propagation length and guiding capabilities) for precisely addressing advanced sensing and telecommunication applications with chip-scale devices.