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Nankai University overcomes the problem of nanometer processing of lithium niobate

2019-04-12 来源:亚科官网
 
Lithium niobate is known for its electro-optical properties and has become one of the most widely used optical materials. In the information age, the electronic data of every bit in the network is converted into photon information by a lithium niobate modulator, and then transmitted to the world through optical fibers. Therefore, lithium niobate is known as the "optical silicon" in the era of optoelectronics. However, how to realize the micro-nanomation and integration of lithium niobate devices is a world problem that scientists from all over the world are competing to study.
After five years of continuous research, Xu Jingjun, a professor and key professor of the Key Laboratory of Low-light Nonlinear Photonics in the Ministry of Education of Nankai University, successfully completed the processing of lithium niobate nanostructures.
As early as 30 years ago, people tried to manufacture high-quality, miniaturized lithium niobate devices, hoping to create highly integrated optoelectronic chips to achieve ultra-high-speed, large-capacity photoelectric information conversion, transmission and processing. The key to achieving this goal is the processing of lithium niobate nanostructures, which can arbitrarily regulate the characteristics and behavior of light at the nanoscale.
However, due to the high hardness and inactive nature of lithium niobate, the traditional mechanical scoring or chemical etching methods have not been able to realize the processing of lithium niobate nanostructures. This thorny problem has greatly hindered the development of miniaturized, integrated lithium niobate optoelectronic chips and their devices.
After process research and technical research, Xu Jingjun and Ren Mengyu team developed a special lithium niobate preparation and processing process, and used a focused high-energy gallium ion beam to selectively bombard and remove lithium niobate molecules. On the surface of a lithium niobate film with a thickness of only 100 nanometers, an array of ordered nanowire arrays was fabricated, and a new type of artificial material called "lithium niobate superstructure surface" was obtained for the first time.
The researchers said: "This new material achieves selective transmission of incident light color and achieves a structural color effect similar to butterfly wings, which means that we have found a way to effectively regulate and impart lithium niobate A new means of optical properties."
This result indicates that people have the ability to perform fine manipulation of light behavior at the nanometer scale based on lithium niobate. The processing technology have opened the door for the application of lithium niobate, a unique photoelectric material in micro-nanophotonics, integrated photonics and other fields.
Edited by Suzhou Yacoo Science Co., Ltd.