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) Schematic of the Si/SiO₂/Au stack. (b) Magnitude of the electric field at the antenna’s position (center of the antenna) as a function of thickness h₁ at λ = 1400 nm. (c) Transmission to one end of the waveguide of the antenna as a function of thickness h₁ at λ = 1400 nm excited by a Gaussian beam focused to a 3-μm spot.