Ci gaban Bincike na InGaAs photodetector

Ci gaban Bincike naInGaAs mai daukar hoto

Tare da haɓakar haɓakar ƙarar watsa bayanan sadarwa, fasahar haɗin haɗin kai ta maye gurbin fasahar haɗin gwiwar wutar lantarki ta gargajiya kuma ta zama fasaha ta yau da kullun don watsawa mai matsakaici da nisa mai ƙarancin sauri. A matsayin ainihin ɓangaren ƙarshen karɓar gani, damai daukar hotoyana da ƙarin buƙatu mafi girma don aikin sa mai sauri. Daga cikin su, waveguide hade photodetector karami ne a girman, high a bandwidth, da kuma sauki a haɗa a kan guntu tare da sauran optoelectronic na'urorin, wanda shi ne bincike mayar da hankali na high-gudun photodetection. kuma sune mafi wakilcin masu gano hoto a cikin rukunin sadarwar infrared na kusa.

InGaAs shine ɗayan ingantattun kayan don cimma babban sauri damanyan masu daukar hoto. Da fari dai, InGaAs abu ne mai ɗaukar hoto na bandgap kai tsaye, kuma faɗin bandgap ɗin sa na iya daidaita shi ta hanyar rabo tsakanin In da Ga, yana ba da damar gano siginar gani na tsawon zango daban-daban. Daga cikin su, In0.53Ga0.47As ya dace daidai da inP substrate lattice kuma yana da babban ƙarfin ɗaukar haske a cikin rukunin sadarwa na gani. Shi ne mafi yadu amfani a cikin shirye-shiryen na photodetector kuma yana da mafi fice duhu halin yanzu da responsivity yi. Abu na biyu, duka InGaAs da kayan InP suna da ingantacciyar ingantacciyar ingantacciyar saurin motsi na lantarki, tare da cikakken saurin tafiyarsu na lantarki duka kusan zama 1 × 107cm/s. A halin yanzu, a ƙarƙashin takamaiman filayen lantarki, kayan InGaAs da InP suna nuna tasirin wutar lantarki mai saurin wuce gona da iri, tare da saurin girman girman su ya kai 4 × 107cm/s da 6 × 107cm/s bi da bi. Yana da amfani don cimma babban ƙetare bandwidth. A halin yanzu, InGaAs photodetectors su ne mafi al'ada photodetectors don gani sadarwa. Hakanan an ƙirƙira na'urorin gano abin da ya faru na ƙasa mai ƙanƙanta, abin da ya faru na baya, da babban bandwidth, galibi ana amfani da su a aikace-aikace kamar babban gudu da cikakken jikewa.

Koyaya, saboda ƙarancin hanyoyin haɗin gwiwar su, masu gano abubuwan da ke faruwa a saman suna da wahala a haɗa su da sauran na'urorin optoelectronic. Sabili da haka, tare da karuwar buƙatun haɗin kai na optoelectronic, waveguide tare da InGaAs masu daukar hoto tare da kyakkyawan aiki da dacewa da haɗin kai sun zama hankali na bincike. Daga cikin su, inGaAs na kasuwanci na kayan aikin hoto na 70GHz da 110GHz kusan duk suna ɗaukar tsarin haɗin gwiwar igiyar ruwa. Dangane da bambance-bambance a cikin kayan maɓalli, waveguide haɗe da InGaAs masu gano hoto ana iya rarraba su zuwa nau'i biyu: tushen INP da Si-based. Epitaxial na kayan abu akan ƙananan InP yana da inganci mai kyau kuma ya fi dacewa da ƙirƙira na'urori masu mahimmanci. Koyaya, don kayan rukuni na III-V waɗanda aka girma ko an haɗa su akan Si substrates, saboda rashin daidaituwa daban-daban tsakanin kayan InGaAs da Si substrates, kayan ko ingancin mu'amala ba su da kyau, kuma har yanzu akwai babban ɗaki don haɓaka aikin na'urorin.

Na'urar tana amfani da InGaAsP maimakon InP azaman kayan yanki mai lalacewa. Ko da yake yana rage saurin juyewar electrons zuwa wani ƙayyadadden ƙayyadaddun yanayin, yana haɓaka haɗa hasken abin da ya faru daga jagorar igiyar ruwa zuwa yankin sha. A lokaci guda, an cire nau'in lamba na nau'in InGaAsP N, kuma an kafa ƙaramin rata a kowane gefen nau'in nau'in P, yadda ya kamata yana haɓaka ƙuntatawa akan filin haske. Yana da amfani ga na'urar don samun mafi girman amsawa.