Work

Wavelength-size hybrid Si-VO_2 waveguide electroabsorption optical switches and photodetectors

Year: 2015

Type: article

Abstract: Ultra-compact waveguide electroabsorption optical switches and photodetectors with micron- and sub-micron lengths and compatible with silicon (Si) waveguides are demonstrated using the insulator-metal phase transition of vanadium dioxide (VO(2)). A 1 μm long hybrid Si-VO(2) device is shown to achieve a high extinction ratio of 12 dB and a competitive insertion loss of 5 dB over a broad bandwidth of 100 nm near λ = 1550 nm. The device, operated as a photodetector, can measure optical powers less than 1 μW with a responsivity in excess of 10 A/W. With volumes that are about 100 to 1000 times smaller than today's active Si photonic components, the hybrid Si-VO(2) devices show the feasibility of integrating transition metal oxides on Si photonic platforms for nanoscale electro-optic elements.

Source: Optics Express

DOI: 10.1364/oe.23.003657

Authors: Arash Joushaghani, Junho Jeong, Suzanne Paradis, David Alain, J. Stewart Aitchison, Joyce K. S. Poon

Institutions: University of Toronto, Defence Research and Development Canada

Language: English

Topic: Photonic and Optical Devices

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funders: Canada Research Chairs, Natural Sciences and Engineering Research Council of Canada