OPTICAL MODULATOR AND PLANAR PHOTONIC DEVICE MODULE

摘要

An optical modulator (100), comprising a polymer waveguide (110), at least one first capacitor plate (131), and at least one second capacitor plate (132); said polymer waveguide comprising a core layer (113); said first capacitor plate (131) and second capacitor plate (132) being separated from each other and extending into said core layer (113); the projection of said first capacitor plate (131) and the projection of said second capacitor plate (132) being at least partially coincident in the radial direction of the cross-section; said first capacitor plate (131) and/or second capacitor plate (132) being made of graphene thin film; when a modulated voltage signal is applied between said first capacitor plate (131) and second capacitor plate (132), the graphene optical absorption coefficient in the first capacitor plate (131) and/or the second capacitor plate (132) changing, thereby modulating the light of the polymer waveguide (110). The optical modulator (100) has a small integrated size, low power consumption, and large modulation bandwidth. Also provided is a planar photonic device module (10) comprising said optical modulator (100).