Enwere ike kewaa windo silicon ụzọ abụọ: mkpuchi na enweghị mkpuchi, ma hazie ya dịka ihe ndị ahịa chọrọ. Ọ dabara maka eriri infrared nso na mpaghara 1.2-8μm. N'ihi na ihe silicon nwere njirimara nke njupụta dị ala (njupụta ya bụ ọkara nke ihe germanium ma ọ bụ ihe zinc selenide), ọ dị mma karịsịa maka oge ụfọdụ na-enwe mmetụta dị arọ, karịsịa na band 3-5um. Silicon nwere ike Knoop nke 1150, nke siri ike karịa germanium ma na-adịchaghị ike karịa germanium. Otú ọ dị, n'ihi na ya ike absorption band na 9um, ọ bụghị adabara CO2 laser nnyefe ngwa.