ELECTROMAGNETIC WAVE DETECTOR AND ELECTROMAGNETIC WAVE DETECTION SYSTEM

To improve detection output of an electromagnetic wave.SOLUTION: An electromagnetic wave detector comprises: a substrate; an electromagnetic wave detection element grounded in the substrate and having a Schottky junction part and a pair of conductive parts bonded to each other through the Schottky junction part; a floating conductive part arranged at a position separated from the Schottky junction part in the substrate, having a portion in an arrangement direction of at least the pair of conductive parts at an end at a side of the electromagnetic wave detection element and having a width in the arrangement direction equal to or more than that in the arrangement direction of the electromagnetic wave detection element. When a central wavelength of a detection wavelength band of the electromagnetic wave detection element is a wavelength λ, and a separation distance between the Schottky junction part and the floating conductive part is a distance L, L is 90% or more and 110% or less of an odd multiple of (λ/4).SELECTED DRAWING: Figure 2 【課題】電磁波の検出出力を向上させる。【解決手段】本発明の電磁波検出装置は、基板と、前記基板に接地され、ショットキー接合部及び前記ショットキー接合部を介して互いに接合している一対の導電部を有する電磁波検出素子と、前記基板における前記ショットキー接合部から離間した位置に配置され、前記電磁波検出素子側の端に少なくとも前記一対の導電部の並び方向に沿う部分を有し、前記並び方向の幅が前記電磁波検出素子の前記並び方向の幅以上のフローティング導電部と、を備え、前記電磁波検出素子の検出波長帯の中心波長を波長λとし且つ前記ショットキー接合部と前記フローティング導電部との離間距離を距離Ｌとした場合、Ｌは（λ／４）の奇数倍の９０％以上１１０％以下とされている。【選択図】図２