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Magneto-optical nonreciprocal devices in silicon photonics

Date:
January 8, 2014
Source:
National Institute for Materials Science
Summary:
In a paper published, researchers demonstrated the first optical isolator on silicon waveguide platforms.

As the recent demand for optical interconnections is increased, much attention has been paid to silicon photonics because of the small device footprint and CMOS compatible process. An optical isolator is essential for protecting optical active devices from reflected light even in short-distance transmission systems.

However, the bottleneck of integrated optical isolator lies in difficulty in growing magneto-optical garnet crystals on commonly used optical waveguide platforms such as silicon.

Yuya Shoji and Tetsuya Mizumoto of Tokyo Institute of Technology, approached the problem using a direct bonding technique which realizes direct contact of different materials. The authors have demonstrated the first optical isolator on silicon waveguide platforms.

In this paper published in Science and Technology of Advanced Materials, they describe the direct bonding, design of the waveguide isolator, and recent progress on a silicon isolator with an optical isolation of 30 dB and a four port optical circulator. They also introduce approaches done by other research groups in the paper.

Compared to the state-of-the-art deposition approach, the bonding technique is advantageous because a single-crystalline magneto-optical garnet having a large magneto-optical effect can be used.


Story Source:

The above story is based on materials provided by National Institute for Materials Science. Note: Materials may be edited for content and length.


Journal Reference:

  1. Yuya Shoji, Tetsuya Mizumoto. Magneto-optical non-reciprocal devices in silicon photonics. Science and Technology of Advanced Materials, 2014; 15 (1): 014602 DOI: 10.1088/1468-6996/15/1/014602

Cite This Page:

National Institute for Materials Science. "Magneto-optical nonreciprocal devices in silicon photonics." ScienceDaily. ScienceDaily, 8 January 2014. <www.sciencedaily.com/releases/2014/01/140108170517.htm>.
National Institute for Materials Science. (2014, January 8). Magneto-optical nonreciprocal devices in silicon photonics. ScienceDaily. Retrieved October 21, 2014 from www.sciencedaily.com/releases/2014/01/140108170517.htm
National Institute for Materials Science. "Magneto-optical nonreciprocal devices in silicon photonics." ScienceDaily. www.sciencedaily.com/releases/2014/01/140108170517.htm (accessed October 21, 2014).

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