PROBLEM TO BE SOLVED: To provide an optical semiconductor device in which fluorescence detection efficiency and detection accuracy are improved.SOLUTION: An optical semiconductor device (1) includes an LED structure (3a) that generates excitation light, and a PD structure (4a) that absorbs the fluorescence occurring from the skin by the radiation of excitation light, the LED structure (3a) and the PD structure (4a) being formed on a sapphire substrate (2). On an incident plane side of the PD structure (4a), upon which fluorescence is made incident, an optical filter (47) is disposed that allows the fluorescence selectively to pass through it.COPYRIGHT: (C)2014,JPO&INPIT【課題】蛍光の検出効率および検出精度を向上させた光半導体デバイスを提供する。【解決手段】本発明に係る光半導体デバイス(1)は、励起光を発生させるLED構造体(3a)と、励起光の照射により皮膚から生じる蛍光を吸収するPD構造体(4a)とがサファイア基板(2)に形成されている。蛍光を入射させるPD構造体(4a)の入射面側に該蛍光を選択的に透過させる光学フィルタ(47)が配置されている。【選択図】図2
