Patent ID: 11953766
Assignee: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 11:
12. A directional coupler, comprising:
a buried oxide (BOX) layer;
a first metal oxide semiconductor (MOS) capacitor formed on the BOX layer, the first MOS capacitor comprising:
a first optical waveguide;
a first cathode comprising a first material and formed in the first optical waveguide;
a first anode formed in the first optical waveguide, the first anode comprising a second material different from the first material; and
a first dielectric disposed between the first cathode and the first anode, the first dielectric comprising an oxide of the first material and an oxide of the second material, wherein the first MOS capacitor is defined between the first anode and the first cathode; and

a first mesa disposed on the first MOS capacitor, the first mesa comprising:
the first anode;
a first optically active region disposed on the first anode; and
a first semiconductor layer comprising the second material disposed on the optically active region; and

a second optical waveguide disposed on the BOX layer adjacent to the first optical waveguide having a first gap between the first and second optical waveguides.