Regular Article

Multilayered photonic integration on SOI platform using waveguide-based bridge structure

¹ Department of Applied Optics & Photonics, University of Calcutta, JD-2, Sector-III, Salt Lake, Kolkata 700098, India
² Department of Electronics & Instrumentation Engg., Techno India, Salt Lake, Kolkata, India

^* e-mail: srirajib@yahoo.com

Received: 12 January 2018
Received in final form: 18 April 2018
Accepted: 2 May 2018
Published online: 8 June 2018

Abstract

A waveguide based structure on silicon on insulator platform is proposed for vertical integration in photonic integrated circuits. The structure consists of two multimode interference couplers connected by a single mode (SM) section which can act as a bridge over any other underlying device. Two more SM sections acts as input and output of the first and second multimode couplers respectively. Potential application of this structure is in multilayered photonic links. It is shown that the efficiency of the structure can be improved by making some design modifications. The entire simulation is done using effective-index based matrix method. The feature size chosen are comparable to waveguides fabricated previously so as to fabricate the proposed structure easily.