PHOTOCONDUCTIVE ELEMENT AND MEASUREMENT DEVICE

To appropriately set an interval between a pair of electrodes sandwiching a photoconductive layer.SOLUTION: A photoconductive element 110 comprises: a photoconductive layer 112 in which excitation light LB1 is incident on the surface 112a thereof; and a pair of electrodes 113-3, 114-3 sandwiching the photoconductive layer along a predetermined direction X intersecting with an incident direction Z of the excitation light. Shape of each of the pair of electrodes on a plane intersecting the incident direction is an arc shape distributed along the outer edge of an optical path of the excitation light which the photoconductive layer transmits.SELECTED DRAWING: Figure 3 【課題】光伝導層を挟み込む一対の電極の間の間隔を適切に設定する。【解決手段】光伝導素子１１０は、表面１１２ａに励起光ＬＢ１が入射する光伝導層１１２と、励起光の入射方向Ｚに交わる所定方向Ｘに沿って光伝導層を挟み込む一対の電極１１３－３、１１４－３とを備え、一対の電極の夫々の入射方向に交わる平面上での形状は、光伝導層内を透過する励起光の光路の外縁に沿って分布する円弧形状である。【選択図】図３