The British developed all-optical diode, or have an important impact on the photon communication etc.

According to the 16 physicist organizational networks reported that Britain's National Physical Laboratory (NPL) researchers have developed a new all-optical diode, the diode can be used for micro photonic circuits, light emitting diode is expected to provide a cheap and efficient micro nano photonic chip, which has an important effect on the photonic chip and photonic communications and other fields.

Peking University Institute of modern optics researcher Xiao Yunfeng told Technology Daily reporter explained: "can a diode current transmission direction, but blocking reverse current is almost all electronic circuit elements, but the existing optical diode need large magneto-optical crystal, seriously hindered the integration in micro nano scales. Become one of the major challenges in the field of integrated photonics."

In the new study, Dr. Pascal Delheie led the team to emit light of a micro resonator (a silicon chip on glass micro inner ring). Although the micro ring diameter only with human hair, can make the light back and forth in the micro ring communication. By using the optical Kerr effect of micro ring enhancement, the team created a new all-optical diode. A new diode can upload only in a direction of light, and can be integrated into the micro nano photonic circuits, therefore, to overcome the large magneto optical crystal diode requires this limit.

Del Haya stressed that: "these diodes are expected to provide cheap and efficient light for light emitting diode chip, the circuit can be used for the new integrated photonic optical computing to pave the way, may also have a significant impact on the photon communication system in the future."

It is reported that China scientists also got good achievements in this field, such as University of Science & Technology China, Dr. Dong Chunhua using the micro cavity optomechanical interactions, the nonreciprocal all-optical control of microcavity devices, including all-optical diode and circulators.

Xiao Yunfeng said: "although not the latest research first all-optical diodes, but the device has the advantages of simple operation, high isolation, is a potential solution. Of course, similar to the existing scheme of all-optical diode, all-optical diode resonant cavity are based on bandwidth limitations, can only work in the resonant mode in a narrow. The future needs further study, to break the limitation."

LED more information, please click on the LED network or the WeChat public account (cnledw2013).