Waveguide acousto-optical modulators for integrated photonics

Research Topic

Optical waveguides on semiconducting chips are essential elements for integrated photonic components. This project investigates the use of surface acoustic waves (SAW) to control light propagation in these structures.


Goals

The project’s aim is to develop an arrayed waveguide grating (AWG) device that allows the modulation of a multi-chromatic entrance signal. This wavelength division (de)multiplexing (WDM) enables the rerouting of signals with a well-defined spectral separation of 2 nm with respect to a centre wavelength of 1.55 µm and using 5×5 Multimode Interference (MMI) devices. This rerouting process will be dynamically triggered by applied SAWs.

Fellow

Dominik D. Bühler

Host: University of Valencia – Institute for Material Sciences (ICMUV)

Scientific Background

I am a physicist who graduated from the University of Augsburg. My main fields of research there revolved around solid state physics, material sciences and more specifically nanostructures. As a concrete example, I investigated the optical properties of (Al)GaAs nanowires using surface acoustic waves (SAW) to modulate their electronic band structure for my Master thesis.
In the SAWtrain network, I expanded these skills by learning how to design, fabricate and optically characterise a range of acoustically tuneable integrated photonic circuits. During the project close collaborations were held with the Paul Drude Institute in Berlin, VLC Photonics in Valencia and the University of Augsburg that all helped with training, as well as with sample development and fabrication.

2019
2018
Conference/Workshop Contributions
    • Acoustically tuned multi-channel wavelength modulators for integrated photonics
      D. D. Bühler, A. Crespo-Poveda, A. Tahraoui, K. Biermann, P. Muñoz, P. V. Santos, A. Cantarero, M. M. de Lima Jr.
      International Workshop on Sound-enabled Nanotechnologies (Valencia, Spain, November 26 – 29, 2018)
    • Acoustically tuned dynamic wavelength division multiplexing
      D. D. Bühler, A. Crespo-Poveda, A. Cantarero, M. M. de Lima Jr.
      Spring Meeting of the German Physical Society (DPG) (Berlin, Germany, March 11-16, 2018)
    • Advanced acoustically tuned optical modulators for integrated photonics
      D. D. Bühler, A. Crespo-Poveda, A. Cantarero, M. M. de Lima Jr.
      GEFES 2018, Solid State Physics conference of the Real Sociedad Española de Física (Valencia, Spain, January 24-26, 2018)
2017
Conference/Workshop Contributions
    • Advanced acoustically tuned optical modulators for integrated photonics
      D. D. Bühler, A. Crespo-Poveda, A. Cantarero, M. M. de Lima Jr.
      SAWtrain Summer School: Physics and applications of GHz vibrations in semiconductors (Cargèse, France, July 11-21, 2017) | Internal

Valencia – Ciudad de las Artes y Ciencias – Photo by José Porras