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Nanoplasmonic couplers using gallium lanthanum sulfide (GLS) and cuprous oxide (Cu2O) are proposed. Their characteristics and performances are analyzed numerically using the finite-difference time-domain (FDTD) method. A coupling efficiency of 67% has been achieved at the optical communication wavelength when GLS is used as the coupler whereas a coupling efficiency of 56% has been achieved when cuprous...
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