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2D/3D van der Waals heterojunction devices
Monolithic 3D integration technology
Wide bandgap devices
2D/3D van der Waals heterojunction devices
Background
- The choice of materials that can be grown in conventional epitaxy is limited by the lattice constant of the substrate
- The 2D van der Waals (vdW) material relaxes the lattice constant constraint. 2D/3D vdW heterojunction opens up the possibility of various energy band alignment that could not be achieved with conventional epitaxy
VIS/NIR wideband photodetectors
- Face recognition uses a 940 nm VCSEL, limited by the spectral response of the Si image sensor For eye safety, an image sensor capable of detecting a 1.55 μm long wavelength is required
- MoS2/Ge vdW heterojunction enables visible/near infrared wideband photodetection
