Hei whakatutuki i te pumau wera pai rawa atu, kua hangaia tēnei arotahi mā te whakamahi i te Karāhe Chalcogenide kua whakakikoruatia kia tino tika (kaua ki te Germanium tuku iho). Ko te tauwehenga pāmahana ahurei o te taupū whakaata (dn/dt) o te karāhe Chalcogenide, me te hoahoa whatu matatau, ka whakatikatika aunoa i te whakakorenga wera. Mā tēnei ka oati ka tukuna e te kōhao nui F1.0 ngā whakaahua wera koi tonu, he rerekē te rerekētanga i te makariri rawa, i te wera nui rānei, mai i te -40°C ki te +80°C.
E 20 tau te roangaru e arotahi ana ki te whakarato i ngā hua whatu tino tika.