Lin, Tzu-ChiangTzu-ChiangLinMa, Ta-ChunTa-ChunMaLin, Hao-HsiungHao-HsiungLin2009-03-182018-07-062009-03-182018-07-062008https://www.scopus.com/inward/record.uri?eid=2-s2.0-49349103358&doi=10.1109%2fLPT.2008.926849&partnerID=40&md5=6b6b6dc1bb51b3eed2018d91b6147557We report an AlGaAs ambient light detector with a spectral response matched to Commission Internationale de l'Eclairage (CIE) photopic luminosity function. The detector consists of an Al0.6 Ga0.4As PIN junction for main absorption, a two-step-four-section compositional grading structure centered in the junction for auxiliary absorption, and a built-in filtering structure on top of the PIN junction. The peak responsivity of the detector is 0.096 A/W at 558 nm, which corresponds to 164 pA/lux in photometric unit. The CIE defined spectral mismatch index f1′ of the detector is as low as 5.8%. © 2008 IEEE.application/pdf272657 bytesapplication/pdfen-USAlGaAs; Ambient light detector; Commission Internationale de l'Eclairage (CIE) photopic luminosity functionAlGaAs; Ambient light; Ambient light detector; Commission Internationale de l'Eclairage (CIE) photopic luminosity function; Luminosity function; Spectral responses; Photodetectorsjournal article10.1109/LPT.2008.9268492-s2.0-49349103358http://ntur.lib.ntu.edu.tw/bitstream/246246/146278/1/85.pdf