Table of Contents
Advances in Optics
Volume 2014, Article ID 891395, 24 pages
Review Article

Hybrid Materials for Integrated Photonics

Nanoscience Laboratory, Department of Physics, University of Trento, Via Sommarive 14, Povo, 38123 Trento, Italy

Received 5 January 2014; Revised 21 March 2014; Accepted 24 March 2014; Published 26 June 2014

Academic Editor: Shouyuan Shi

Copyright © 2014 Paolo Bettotti. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In this review materials and technologies of the hybrid approach to integrated photonics (IP) are addressed. IP is nowadays a mature technology and is the most promising candidate to overcome the main limitations that electronics is facing due to the extreme level of integration it has achieved. IP will be based on silicon photonics in order to exploit the CMOS compatibility and the large infrastructures already available for the fabrication of devices. But silicon has severe limits especially concerning the development of active photonics: its low efficiency in photons emission and the limited capability to be used as modulator require finding suitable materials able to fulfill these fundamental tasks. Furthermore there is the need to define standardized processes to render these materials compatible with the CMOS process and to fully exploit their capabilities. This review describes the most promising materials and technological approaches that are either currently implemented or may be used in the coming future to develop next generations of hybrid IP devices.