A comprehensive design strategy using waveguide-integrated-metasurface is proposed for versatile on-chip light-coupling. The coupling-direction, operation-wavelength and excited-mode-type are configurable at will for arbitrary polarizations, with high efficiency of 67% and directivity over 20 dB.Show More
Integrated mode-selective on-chip couplers are reported using Si-nanoantennas-patterned Si3N4 waveguide. A chip-integrated twisted-light generator coupling free-space light into optical vortex carrying 1ħ OAM is numerically demonstrated, by engineering spatial modal-overlap & controlled mode mixing.Show More
We demonstrate a graphene/III-V hybrid diode optical modulator working over a large frequency range from NIR to THz. The hybrid diode is achieved by heterogeneous integration of graphene and III-V heterostructures by remote epitaxy growth.Show More
Graphene known for its superb physical properties, such as high transparency and thermal conductivity, is proposed as a solution to the problem of thermal management of the electronic devices, requiring transparency and cooling. It is shown that graphene heat spreader layer drives the heat out of the device more efficiently as compared with the commercially used metal thin films for integrated cir...Show More
