Nnyocha ọhụrụ nkefotodetector nke oke mmiri ozuzo
A na-eji teknụzụ nchọpụta infrared eme ihe n'ọtụtụ ebe na nyocha ndị agha, nlekota gburugburu ebe obibi, nchọpụta ahụike na mpaghara ndị ọzọ. Ihe nchọpụta infrared omenala nwere ụfọdụ oke na arụmọrụ, dị ka nchọpụta nchọpụta, ọsọ nzaghachi na ihe ndị ọzọ. Ihe InAs/InAsSb Class II superlattice (T2SL) nwere ezigbo fotoelectric Njirimara na tunability, na-eme ka ha dị mma maka ndị na-achọpụta infrared ogologo (LWIR). Nsogbu nke nzaghachi adịghị ike na ogologo ebili mmiri infrared nchọpụta bụ nchegbu ruo ogologo oge, nke na-egbochi ntụkwasị obi nke ngwa ngwa ngwa eletrọnịkị. Ọ bụ ezie na ihe nchọpụta foto nke oke mmiri ozuzo (Onye nyocha foto APD) nwere arụmọrụ nzaghachi dị mma, ọ na-ata ahụhụ site na oke ọchịchịrị dị elu n'oge ịba ụba.
Iji dozie nsogbu ndị a, otu sitere na Mahadum Eletrọnịkị Sayensị na Nkà na Ụzụ nke China emebela nke ọma n'ịhazi Klas II superlatice (T2SL) ogologo ebili mmiri infrared avalanche photodiode (APD). Ndị ọrụ nyocha ahụ jiri obere nchikota auger nke InAs/InAsSb T2SL absorber oyi akwa iji belata ọchịchịrị ugbu a. N'otu oge ahụ, a na-eji AlAsSb nwere obere k uru dị ka oyi akwa na-abawanye ụba iji gbochie mkpọtụ ngwaọrụ ma na-ejigide uru zuru oke. Nhazi a na-enye ihe ngwọta dị mma maka ịkwalite mmepe nke teknụzụ nchọpụta infrared ogologo. Onye nchọta ahụ na-anabata atụmatụ steepụ steepụ, yana site n'ịgbanwe nhazi nhazi nke InAs na InAsSb, a na-enweta ngbanwe dị mma nke nhazi band, na arụ ọrụ nke onye nchọta ga-akawanye mma. N'ihe gbasara nhọrọ ihe na usoro nkwadebe, ọmụmụ a na-akọwa n'ụzọ zuru ezu usoro uto na usoro nhazi nke InAs/InAsSb T2SL ihe eji akwadebe ihe nchọpụta. Ịchọpụta ihe mejupụtara na ọkpụrụkpụ nke InAs/InAsSb T2SL dị oke egwu na a chọrọ mmezi oke iji nweta nguzozi nrụgide. N'ihe gbasara nchọpụta infrared dị ogologo, iji nweta otu ogologo nbibi dị ka InAs/GaSb T2SL, a chọrọ otu oge InAs/InAsSb T2SL toro ogologo. Otú ọ dị, nnukwu monocycle na-ebute mbelata nke ọnụọgụ absorption na ntụziaka nke uto na mmụba nke oghere dị irè na T2SL. Achọpụtara na ịgbakwụnye akụrụngwa Sb nwere ike nweta ogologo wavelength cutoff na-enweghị mmụba nke ukwuu n'otu oge. Agbanyeghị, ihe mejupụtara Sb gabigara ókè nwere ike ibute nkewa nke ihe Sb.
Ya mere, InAs/InAs0.5Sb0.5 T2SL nwere Sb otu 0.5 ahọpụtara dị ka oyi akwa na-arụ ọrụ nke APD.fotodetector. InAs/InAsSb T2SL na-eto eto na mkpụrụ GaSb, yabụ ọrụ GaSb na njikwa nsogbu kwesịrị ịtụle. N'ụzọ bụ isi, ịnweta nha nha nha gụnyere iji atụnyere nkezi lattice na-adịgide adịgide nke superlattice maka otu oge ka ọ bụrụ ihe na-adịgide adịgide nke mkpụrụ. N'ozuzu, a na-akwụ ụgwọ nhịahụ dị na InAs site na mkpakọ mkpakọ nke InAsSb webatara, na-ebute oyi akwa InAs toro karịa karịa oyi akwa InAsSb. Ọmụmụ ihe a tụrụ njirimara nzaghachi fotoelectric nke onye na-ahụ maka ihe nleba anya, gụnyere nzaghachi spectral, ọchịchịrị ugbu a, mkpọtụ, wdg, wee chọpụta ịdị irè nke nhazi oyi akwa steepụ. A na-enyocha mmetụta ịba ụba nke oke oke mmiri nke fotodetector nke avalanche, na mmekọrịta dị n'etiti ihe nrịba ụba na ike ọkụ, okpomọkụ na ihe ndị ọzọ a na-atụle.
FIG. (A) Eserese eserese nke InAs/InAsSb infrared fotodetector ogologo ebili mmiri; (B) Eserese eserese nke mpaghara eletrik na oyi akwa ọ bụla nke APD fotodetector.
Oge nzipu: Jan-06-2025