| 摘要 |
<p>This optical modulator (1) is provided with: a first semiconductor layer (4) having a first conductivity type; a dielectric layer (5) which is formed upon the first semiconductor layer (4), and which extends along a top of the first semiconductor layer (4) in a first direction; and a second semiconductor layer (6) which is formed upon the dielectric layer (5), and which has a second conductivity type different to the first conductivity type. The dielectric layer (5) is provided with: a first region (5a) which, when viewed from the first direction, is positioned at a centre of the dielectric layer (5) in a width direction, and which has a relatively high electric capacitance in a thickness direction of the dielectric layer (5); and second regions (5b) which are positioned at ends of the dielectric layer (5) in the width direction, and which have a relatively low electric capacitance in a thickness direction.</p> |
