The international group of researchers has developed a new technology to create optical wave drivers: "SPIM-WG." By this method, the optical nano-size wavers with a smooth three-dimensional cross-section can be produced on a chip; such devices are not only better than traditional ones, but have several new functions that open the way for future photonic and quantum chips.
In their work published in Light Science & Applications, scientists used a femtosecond laser record to create optically compatible glass wavers. In high-speed scanning, they were able to achieve precise deformation of cross sections along a controlled wave with high resolution dimensions in both horizontal and vertical transverse directions.
Researchers say that the main advantage of a new technology based on adaptive optics is that it allows the production of low-variable cross-section wavers, e.g. circular, square, ring or many other complex forms. The accuracy of cross-sectional control on each axle can reach hundreds of nanometers. For a single wave, the shape of the cross-section can vary along the wave itself. For example, it can be rolled from square to circular to circular to circular.
The study showed very low losses when using new wave drivers. A wave unit created on a glass substrate has losses in transmission of about -0.14 dB/cm. This means that only about 3 per cent of the optical power is lost in 1 cm transmission via a chip, explained by the developers. Moreover, the experimental results show that the additional loss in transmission caused by the change in the cross section is insignificant.
Scientists also note the speed of production using new technology. In the creation of traditional silicon silicon surgers, it takes months when using SPIM-WG, it takes only a few minutes to create and test prototypes of the device quickly, without taking months to create a new version of the product.
The development of electronic integrated circuits is nearing the limit of capacity and energy consumption. Photo and quantum chips can be a reasonable alternative. Based on cloudy wave communication, adjacent optical wavers can implement programmable signal processing, providing the necessary functions for quantum and photo chips.