Safronov Kirill R, Gulkin Dmitry N, Antropov Ilya M, Abrashitova Ksenia A, Bessonov Vladimir O, Fedyanin Andrey A
Faculty of Physics, Lomonosov Moscow State University, Moscow 119991, Russia.
Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow 119071, Russia.
ACS Nano. 2020 Aug 25;14(8):10428-10437. doi: 10.1021/acsnano.0c04301. Epub 2020 Aug 4.
Integrated photonics aims at on-chip controlling light in the micro- and nanoscale ranges utilizing the waveguide circuits, which include such basic elements as splitters, multiplexers, and phase shifters. Several photonic platforms, including the well-developed silicon-on-insulator and surface-plasmon polaritons ones, operate well mostly in the IR region. However, operating in the visible region is challenging because of the drawbacks originating from absorption or sophisticated fabrication technology. Recently, a new promising all-dielectric platform based on Bloch surface electromagnetic waves (BSWs) in multilayer structures and functioning in the visible range has emerged finding a lot of applications primarily in sensing. Here, we show the effect of multimode interference (MMI) of BSWs and propose a method for implementing the advanced integrated photonic devices on the BSW platform. We determine the main parameters of MMI effect and demonstrate the operation of Mach-Zehnder interferometers with a predefined phase shift proving the principle of MMI BSW-based photonics in the visible spectrum. Our research will be useful for further developing a versatile toolbox of the BSW platform devices which can be essential in integrated photonics, lab-on-chip, and sensing applications.
集成光子学旨在利用波导电路在微米和纳米尺度范围内对光进行片上控制，这些波导电路包括诸如分束器、复用器和移相器等基本元件。包括成熟的绝缘体上硅和表面等离激元极化激元在内的几种光子平台大多在红外区域运行良好。然而，由于吸收或复杂制造技术带来的缺点，在可见光区域运行具有挑战性。最近，一种基于多层结构中的布洛赫表面电磁波（BSW）且在可见光范围内工作的新型有前景的全介质平台出现了，主要在传感领域有很多应用。在此，我们展示了BSW的多模干涉（MMI）效应，并提出了一种在BSW平台上实现先进集成光子器件的方法。我们确定了MMI效应的主要参数，并演示了具有预定义相移的马赫-曾德尔干涉仪的运行，证明了基于MMI BSW的光子学在可见光谱中的原理。我们的研究将有助于进一步开发BSW平台器件的通用工具箱，这在集成光子学、芯片实验室和传感应用中可能至关重要。
