Compact and high-efficient wavelength demultiplexing coupler based on high-index dielectric nanoantennas<xref rid="cpb_27_9_094217fn1" ref-type="fn">*</xref><fn id="cpb_27_9_094217fn1"><label>*</label><p>Project supported by the National Key Research and Development Program of China (Grant Nos. 2017YFA0205700 and 2015CB932403) and the National Natural Science Foundation of China (Grant Nos. 11174062, 51472057, and 21790364).</p></fn>

Compact and high-efficient wavelength demultiplexing coupler based on high-index dielectric nanoantennas**

Project supported by the National Key Research and Development Program of China (Grant Nos. 2017YFA0205700 and 2015CB932403) and the National Natural Science Foundation of China (Grant Nos. 11174062, 51472057, and 21790364).

Tan Jingfeng^†, Pang Hua, Meng Fengkai, Jiang Jin

(color online) (a) Simulated splitting ratio (dB), which is defined as 10log10(T_R/T_L), as a function of wavelength and the distance between two antennas. (b) Transmission to the right (blue) and left (red) waveguide for the two asymmetric nanoantennas excited by a Gaussian beam focused to a 3 μm spot with distance d = 1290 nm. (c) Magnitudes of the scattered magnetic fields at wavelengths 1320 nm and 1510 nm in the xoz plane.