In this contribution,we simulate,design,and experimentally demonstrate an integrated optical isolator based on spatiotemporal modulation in the thin-film lithium niobate on an insulator waveguide platform.We used two ...In this contribution,we simulate,design,and experimentally demonstrate an integrated optical isolator based on spatiotemporal modulation in the thin-film lithium niobate on an insulator waveguide platform.We used two cascaded travelling wave phase modulators for spatiotemporal modulation and a racetrack resonator as a wavelength filter to suppress the sidebands of the reverse propagating light.This enabled us to achieve an isolation of 27 dB.The demonstrated suppression of the reverse propagating light makes such isolators suitable for the integration with III-V laser diodes and Erbium doped gain sections in the thin-film lithium niobate on the insulator waveguide platform.展开更多
Precise,wavelength-dependent phase retarding is essential in many fields,such as superresolution imaging,full-color holography,nanomanufacturing,and optical communications.This demand can be achieved by a combination ...Precise,wavelength-dependent phase retarding is essential in many fields,such as superresolution imaging,full-color holography,nanomanufacturing,and optical communications.This demand can be achieved by a combination of multiple optical devices but is challenging to implement using a single element.In this paper,we develop a method for metasurface design that allows wavelength-selective wavefront shaping.Specifically,we demonstrate a metasurface that can selectively modulate a beam with a spiral phase at 785 nm and leave another beam unaffected at 590 nm.展开更多
基金This work was supported by the Australian Research Council(ARC)grants DP190102773,DP190101576,DP220100488.
文摘In this contribution,we simulate,design,and experimentally demonstrate an integrated optical isolator based on spatiotemporal modulation in the thin-film lithium niobate on an insulator waveguide platform.We used two cascaded travelling wave phase modulators for spatiotemporal modulation and a racetrack resonator as a wavelength filter to suppress the sidebands of the reverse propagating light.This enabled us to achieve an isolation of 27 dB.The demonstrated suppression of the reverse propagating light makes such isolators suitable for the integration with III-V laser diodes and Erbium doped gain sections in the thin-film lithium niobate on the insulator waveguide platform.
基金Project supported by the"Leading Goose"Research and Development Program of Zhejiang Province,China(No.2022C01077)the National Key Research and Development Program of China(No.2018YFA0701400)+3 种基金the National Natural Science Foundation of China(No.92050115)the Zhejiang Provincial Natural Science Foundation of China(No.LZ21F050003)the Fundamental Research Funds for the Central Universities,China(No.226-2022-00137)the Zhejiang Postdoctoral Science Fund for Excellent Project(No.511300-X82101)。
文摘Precise,wavelength-dependent phase retarding is essential in many fields,such as superresolution imaging,full-color holography,nanomanufacturing,and optical communications.This demand can be achieved by a combination of multiple optical devices but is challenging to implement using a single element.In this paper,we develop a method for metasurface design that allows wavelength-selective wavefront shaping.Specifically,we demonstrate a metasurface that can selectively modulate a beam with a spiral phase at 785 nm and leave another beam unaffected at 590 nm.