Lithium niobate (LN) mai daukar hoto

Lithium niobate (LN) mai daukar hoto

Lithium niobate (LN) yana da tsari na musamman na crystal da wadataccen tasirin jiki, irin su tasirin da ba na kan layi ba, tasirin lantarki-optic, tasirin pyroelectric, da tasirin piezoelectric. A lokaci guda, yana da fa'idodin fa'ida ta fa'ida ta fa'ida da kwanciyar hankali na dogon lokaci. Waɗannan halayen sun sa LN ya zama muhimmin dandamali don sabbin tsararrun haɗe-haɗe na photonics. A cikin na'urorin gani da tsarin optoelectronic, halayen LN na iya samar da ayyuka masu wadatarwa da aiki, haɓaka haɓakar sadarwar gani, ƙididdigar gani, da filayen ji na gani. Duk da haka, saboda raunin sha da kuma abubuwan rufewa na lithium niobate, haɗakar aikace-aikacen lithium niobate har yanzu yana fuskantar matsalar ganowa mai wahala. A cikin 'yan shekarun nan, rahotanni a cikin wannan filin sun haɗa da haɗaɗɗen hotunan hoto da kuma masu gano hoto na heterojunction.
Haɗe-haɗe na hoto na waveguide dangane da lithium niobate yawanci ana mai da hankali ne akan hanyar sadarwa ta C-band (1525-1565nm). Dangane da aiki, LN galibi yana taka rawa na raƙuman ruwa masu jagora, yayin da aikin gano optoelectronic ya dogara ne akan semiconductor kamar silicon, ƙungiyar ta kunkuntar bandgap semiconductor, da kayan mai girma biyu. A cikin irin wannan gine-gine, ana watsa haske ta hanyar lithium niobate na gani na gani tare da ƙananan hasara, sannan kuma a shayar da wasu kayan aikin semiconductor dangane da tasirin photoelectric (irin su photoconductivity ko photovoltaic effects) don ƙara yawan maida hankali mai ɗaukar hoto da canza shi zuwa siginar lantarki don fitarwa. Fa'idodin shine babban bandwidth aiki (~GHz), ƙarancin ƙarfin aiki, ƙaramin girman, da dacewa tare da haɗin guntu na photonic. Koyaya, saboda rarrabuwar sararin samaniya na lithium niobate da kayan semiconductor, kodayake kowannensu yana yin aikin kansa, LN kawai yana taka rawa wajen jagorantar raƙuman ruwa da sauran kyawawan kaddarorin ƙasashen waje ba a yi amfani da su sosai ba. Kayayyakin Semiconductor kawai suna taka rawa wajen juyar da wutar lantarki da rashin haɗin haɗin gwiwa tare da juna, yana haifar da ƙayyadaddun rukunin aiki. Dangane da ƙayyadaddun aiwatarwa, haɗaɗɗen haske daga tushen haske zuwa lithium niobate Optical waveguide yana haifar da babbar hasara da ƙaƙƙarfan buƙatun tsari. Bugu da ƙari, ainihin ƙarfin gani na hasken da ke haskakawa akan tashar na'urar na'ura mai kwakwalwa a cikin yankin haɗin gwiwa yana da wuyar daidaitawa, wanda ke iyakance aikin gano shi.
Na gargajiyamasu daukar hotoAna amfani da aikace-aikacen hoto yawanci akan kayan semiconductor. Saboda haka, ga lithium niobate, ƙananan ƙarancin haske da kaddarorin da ke rufe shi ya sa ba shakka masu bincike na photodetector ba su son shi, har ma da ma'ana mai wahala a fagen. Koyaya, haɓaka fasahar heterojunction a cikin 'yan shekarun nan ya kawo bege ga binciken lithium niobate tushen photodetectors. Sauran kayan da ke da ƙarfin ɗaukar haske ko ingantaccen aiki mai ƙarfi ana iya haɗa su tare da lithium niobate don rama gazawar sa. A lokaci guda, polarization na kwatsam ya haifar da halayen pyroelectric na lithium niobate saboda tsarin anisotropy ɗin sa ana iya sarrafa shi ta hanyar juyawa zuwa zafi a ƙarƙashin hasken haske, ta haka canza halayen pyroelectric don gano optoelectronic. Wannan sakamako na thermal yana da fa'idodin fa'ida da tuƙi da kai, kuma ana iya haɗa shi da kyau kuma a haɗa shi da wasu kayan. Yin amfani da yanayin zafi da kuma tasirin hoto na aiki tare ya buɗe sabon zamani don masu gano hoto na lithium niobate, yana ba na'urori damar haɗa fa'idodin duka tasirin. Kuma don gyara gazawar da kuma cimma cikakkiyar haɗin kai na fa'idodi, Wurin bincike ne a cikin 'yan shekarun nan. Bugu da kari, yin amfani da ion implantation, band engineering, da kuma lahani injiniya shi ma zabi ne mai kyau don magance wahalar gano lithium niobate. Koyaya, saboda tsananin wahalar sarrafa lithium niobate, wannan filin har yanzu yana fuskantar manyan ƙalubale kamar ƙarancin haɗin kai, na'urori da tsarin hoto na tsararru, da ƙarancin aiki, wanda ke da ƙimar bincike da sarari.

Hoto na 1, ta yin amfani da jahohin makamashi na lahani a cikin bandgap na LN a matsayin cibiyoyin masu ba da gudummawar lantarki, ana samar da masu ɗaukar kaya kyauta a cikin rukunin gudanarwa ƙarƙashin haske mai gani. Idan aka kwatanta da pyroelectric LN photodetectors na baya, waɗanda galibi an iyakance su zuwa saurin amsawa na kusan 100Hz, wannan.LN photodetectoryana da saurin amsawa har zuwa 10kHz. A halin yanzu, a cikin wannan aikin, an nuna cewa magnesium ion doped LN na iya cimma daidaiton haske na waje tare da amsa har zuwa 10kHz. Wannan aikin yana inganta bincike akan babban aiki da aikimasu gano hotuna na LN masu sauria cikin gina cikakken aiki guda-guntu hadedde LN photonic kwakwalwan kwamfuta.
A taƙaice, fannin bincike nabakin bakin fim lithium niobate photodetectorsyana da mahimmancin mahimmancin kimiyya da yuwuwar aikace-aikace mai girma. A nan gaba, tare da haɓaka fasahar fasaha da zurfafa bincike, na'urar daukar hoto na lithium niobate (LN) na bakin ciki za su haɓaka zuwa haɓakar haɓaka. Haɗa hanyoyin haɗin kai daban-daban don cimma babban aiki, saurin amsawa, da firam ɗin bakin ciki na lithium niobate photodetectors a kowane fanni za su zama gaskiya, wanda zai haɓaka haɓaka haɓakar haɗin kan-chip da filayen ji na hankali, da kuma samar da ƙarin damar ga sabon ƙarni na aikace-aikacen photonics.