Abstract
A compact vertical coupler is proposed and optimized based on the multi-phase matching for three-dimensional (3D) mode (de)multiplexing [(De)MUX]. The multi-phase matching conditions can be achieved for the operating TE2, TE1, and TE0 modes of the subwavelength grating-based waveguide. The coupling strength can be significantly increased due to the subwavelength structure. The proposed 3D mode (De)MUX is optimized by utilizing the 3D full-vectorial finite difference time domain method. The optimized mode (De)MUX can achieve the coupling lengths of only 0.25 and 1.75 μm for demultiplexing TE1 and TE2 modes. The insertion losses of the TE2, TE1, and TE0 modes are only 0.25, 0.27, and 0.13 dB, respectively, and 3-dB bandwidths are calculated to be 364, 203, and >300 nm, respectively.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
