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US 12,189,220 B2Granted
Optical modulation element
AssigneeFujitsu Optical Components Limited
InventorKensuke Ogawa
Life of this patent
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Abstract
An optical modulation element 100 includes a rib type optical waveguide that includes a rib portion 112 that has a P-N junction, a P-type slab area 114 that continuously extends from a P type area of the rib portion 112, and an N-type slab area 116 that continuously extends from an N type area of the rib portion 112. A first thin film 130 is formed on the P-type slab area 114 and is made of a material having an electron affinity that is different from that of the P-type slab area 114.
Claims5
An optical modulation element comprising:
- a rib type optical waveguide that includes
- a rib portion that has a P-N junction,
- a P-type slab area that continuously extends from a P type area of the rib portion, and
- an N-type slab area that continuously extends from an N type area of the rib portion;
- and
- a first thin film that is formed on the P-type slab area, that is isolated from a dopant and that is made of a material having an electron affinity that is different from an electron affinity of the P-type slab area, a two-dimensional hold gas (2DHG) being formed in the first thin film.
3 more elements
Dependencies are inferred from the claim text.