S Sun, Y Che, Y Xie, Q Yu, F Wang, X Wang… - Optics Letters, 2023 - opg.optica.org
We present a 1 × 1 multimode optical switch for E_11, E_21, E_12, and E_22 modes based
on cascaded Mach–Zehnder interferometer (MZI) waveguides, where the primary MZI is …