Cov duab thaij duab lithium niobate (LN) nyias zaj duab xis

Cov duab thaij duab lithium niobate (LN) nyias zaj duab xis

Lithium niobate (LN) muaj cov qauv siv lead ua tshwj xeeb thiab cov teebmeem ntawm lub cev zoo, xws li cov teebmeem tsis sib xws, cov teebmeem electro-optic, cov teebmeem pyroelectric, thiab cov teebmeem piezoelectric. Tib lub sijhawm, nws muaj qhov zoo ntawm qhov rais pom tseeb dav dav thiab kev ruaj khov mus sij hawm ntev. Cov yam ntxwv no ua rau LN ua lub platform tseem ceeb rau tiam tshiab ntawm kev sib xyaw ua ke photonics. Hauv cov khoom siv optical thiab optoelectronic systems, cov yam ntxwv ntawm LN tuaj yeem muab cov haujlwm thiab kev ua tau zoo nplua nuj, txhawb kev txhim kho kev sib txuas lus optical, kev suav optical, thiab cov teb pom kev optical. Txawm li cas los xij, vim yog qhov tsis muaj zog ntawm lithium niobate thiab cov khoom rwb thaiv tsev, kev siv lithium niobate tseem ntsib teeb meem ntawm kev nrhiav pom nyuaj. Nyob rau xyoo tas los no, cov ntawv ceeb toom hauv daim teb no feem ntau suav nrog waveguide integrated photodetectors thiab heterojunction photodetectors.
Lub waveguide integrated photodetector uas siv lithium niobate feem ntau yog tsom mus rau kev sib txuas lus optical C-band (1525-1565nm). Hais txog kev ua haujlwm, LN feem ntau yog ua lub luag haujlwm ntawm cov nthwv dej coj, thaum lub luag haujlwm nrhiav optoelectronic feem ntau yog siv cov semiconductors xws li silicon, III-V pawg narrow bandgap semiconductors, thiab cov khoom siv ob-seem. Hauv cov qauv no, lub teeb raug xa mus los ntawm lithium niobate optical waveguides nrog kev poob qis, thiab tom qab ntawd nqus los ntawm lwm cov khoom siv semiconductor raws li cov teebmeem photoelectric (xws li photoconductivity lossis photovoltaic teebmeem) kom nce qhov concentration ntawm cov neeg nqa khoom thiab hloov nws mus rau hauv cov teeb liab hluav taws xob rau cov zis. Qhov zoo yog bandwidth ua haujlwm siab (~ GHz), voltage ua haujlwm qis, me me, thiab sib xws nrog photonic chip kev koom ua ke. Txawm li cas los xij, vim yog qhov sib cais ntawm lithium niobate thiab cov khoom siv semiconductor, txawm hais tias lawv txhua tus ua lawv tus kheej lub luag haujlwm, LN tsuas yog ua lub luag haujlwm hauv cov nthwv dej coj thiab lwm yam khoom txawv teb chaws zoo tsis tau siv zoo. Cov khoom siv semiconductor tsuas yog ua lub luag haujlwm hauv kev hloov pauv photoelectric thiab tsis muaj kev sib txuas ua ke nrog ib leeg, ua rau muaj qhov band ua haujlwm tsawg. Hais txog kev siv tshwj xeeb, kev sib txuas lub teeb los ntawm lub teeb ci mus rau lub lithium niobate optical waveguide ua rau muaj kev poob loj heev thiab cov txheej txheem yuav tsum nruj heev. Tsis tas li ntawd, lub zog kho qhov muag tiag tiag ntawm lub teeb uas raug hluav taws xob rau ntawm lub semiconductor device channel hauv thaj chaw sib txuas yog qhov nyuaj rau calibrate, uas txwv nws qhov kev ua tau zoo ntawm kev ntes.
Cov kev lig kev caiphotodetectorssiv rau kev siv duab feem ntau yog raws li cov ntaub ntawv semiconductor. Yog li ntawd, rau lithium niobate, nws qhov kev nqus lub teeb tsawg thiab cov khoom rwb thaiv tsev ua rau nws tsis nyiam los ntawm cov kws tshawb fawb photodetector, thiab txawm tias yog qhov nyuaj hauv daim teb. Txawm li cas los xij, kev txhim kho ntawm heterojunction thev naus laus zis hauv xyoo tas los no tau coj kev cia siab rau kev tshawb fawb ntawm lithium niobate raws li photodetectors. Lwm cov ntaub ntawv nrog lub zog nqus lub teeb lossis kev coj ua zoo heev tuaj yeem sib xyaw ua ke nrog lithium niobate los them rau nws qhov tsis zoo. Tib lub sijhawm, qhov kev hloov pauv polarization spontaneous induced pyroelectric cov yam ntxwv ntawm lithium niobate vim nws cov qauv anisotropy tuaj yeem tswj tau los ntawm kev hloov mus rau cua sov hauv qab lub teeb irradiation, yog li hloov cov yam ntxwv pyroelectric rau optoelectronic nrhiav. Qhov thermal effect no muaj qhov zoo ntawm wideband thiab tus kheej tsav tsheb, thiab tuaj yeem ua tiav zoo thiab fused nrog lwm cov ntaub ntawv. Kev siv synchronous ntawm thermal thiab photoelectric cov teebmeem tau qhib lub sijhawm tshiab rau lithium niobate raws li photodetectors, ua rau cov khoom siv los ua ke cov txiaj ntsig ntawm ob qho txiaj ntsig. Thiab los ua kom tiav rau qhov tsis zoo thiab ua tiav kev sib koom ua ke ntawm cov txiaj ntsig, Nws yog qhov chaw tshawb fawb hotspot hauv xyoo tas los no. Ntxiv mus, kev siv cov ion implantation, band engineering, thiab defect engineering kuj yog ib qho kev xaiv zoo los daws qhov teeb meem ntawm kev nrhiav pom lithium niobate. Txawm li cas los xij, vim muaj qhov nyuaj ua tiav ntawm lithium niobate, daim teb no tseem ntsib teeb meem loj xws li kev sib koom ua ke qis, cov khoom siv array imaging thiab systems, thiab kev ua haujlwm tsis txaus, uas muaj txiaj ntsig zoo rau kev tshawb fawb thiab qhov chaw.

Daim Duab 1, siv cov xeev zog tsis zoo hauv LN bandgap ua cov chaw pub hluav taws xob, cov neeg nqa khoom dawb tau tsim nyob rau hauv txoj kab hluav taws xob hauv qab lub teeb pom kev zoo. Piv rau cov pyroelectric LN photodetectors yav dhau los, uas feem ntau raug txwv rau qhov ceev teb ntawm ib puag ncig 100Hz, qhov noLN photodetectormuaj qhov teb ceev dua txog li 10kHz. Lub caij no, hauv txoj haujlwm no, nws tau pom tias magnesium ion doped LN tuaj yeem ua tiav qhov kev hloov kho lub teeb sab nraud nrog kev teb txog li 10kHz. Txoj haujlwm no txhawb nqa kev tshawb fawb txog kev ua tau zoo thiabcov duab ntes ceev ceev LNhauv kev tsim cov chips photonic ib leeg-chip uas ua haujlwm tag nrho.
Hauv kev xaus, qhov kev tshawb fawb ntawmCov duab thaij duab lithium niobate nyias zaj duab xismuaj lub ntsiab lus tseem ceeb ntawm kev tshawb fawb thiab muaj peev xwm siv tau ntau yam. Yav tom ntej, nrog rau kev txhim kho thev naus laus zis thiab kev tshawb fawb tob zuj zus, cov duab thaij lithium niobate (LN) yuav tsim kom muaj kev sib koom ua ke siab dua. Kev sib koom ua ke ntawm ntau txoj kev sib koom ua ke kom ua tiav kev ua tau zoo, teb sai, thiab dav dav ntawm cov duab thaij lithium niobate hauv txhua yam yuav dhau los ua qhov tseeb, uas yuav txhawb nqa kev txhim kho ntawm kev sib koom ua ke ntawm on-chip thiab cov teb ntse, thiab muab ntau txoj hauv kev rau tiam tshiab ntawm kev siv photonics.