Nyias zaj duab xis lithium niobate (LN) photodetector

Nyias zaj duab xis lithium niobate (LN) photodetector

Lithium niobate (LN) muaj cov qauv siv lead ua tshwj xeeb thiab muaj txiaj ntsig zoo ntawm lub cev, xws li cov teebmeem nonlinear, cov teebmeem electro-optic, cov teebmeem pyroelectric, thiab cov teebmeem piezoelectric. Nyob rau tib lub sij hawm, nws muaj qhov zoo ntawm wideband optical transparency qhov rais thiab lub sij hawm ntev stability. Cov yam ntxwv no ua rau LN yog lub platform tseem ceeb rau tiam tshiab ntawm kev sib koom ua ke photonics. Hauv cov khoom siv kho qhov muag thiab cov tshuab optoelectronic, cov yam ntxwv ntawm LN tuaj yeem muab kev nplua nuj thiab kev ua haujlwm zoo, txhawb kev txhim kho kev sib txuas lus kho qhov muag, kev suav kho qhov muag, thiab kev paub kho qhov muag. Txawm li cas los xij, vim qhov tsis muaj zog nqus thiab rwb thaiv tsev ntawm lithium niobate, kev sib xyaw ua ke ntawm lithium niobate tseem ntsib teeb meem ntawm kev tshawb nrhiav nyuaj. Nyob rau hauv xyoo tas los no, cov lus ceeb toom hauv daim teb no feem ntau suav nrog waveguide integrated photodetectors thiab heterojunction photodetectors.
Lub waveguide integrated photodetector raws li lithium niobate feem ntau yog tsom rau kev sib txuas lus kho qhov muag C-band (1525-1565nm). Hais txog kev ua haujlwm, LN feem ntau ua lub luag haujlwm ntawm kev coj ua nthwv dej, thaum lub sijhawm kuaj pom optoelectronic feem ntau tso siab rau cov khoom siv hluav taws xob xws li silicon, III-V pawg nqaim bandgap semiconductors, thiab cov khoom siv ob sab. Nyob rau hauv xws li ib tug architecture, lub teeb kis tau los ntawm lithium niobate optical waveguides nrog tsawg poob, thiab ces absorbed los ntawm lwm yam semiconductor cov ntaub ntawv raws li photoelectric los (xws li photoconductivity los yog photovoltaic teebmeem) kom cov cab kuj concentration thiab hloov mus rau hauv hluav taws xob cov khoom rau cov zis. Qhov zoo yog kev khiav hauj lwm siab bandwidth (~ GHz), tsis tshua muaj kev khiav hauj lwm voltage, me me, thiab compatibility nrog photonic nti integration. 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, LN tsuas yog ua lub luag haujlwm hauv kev taw qhia nthwv dej thiab lwm yam khoom txawv teb chaws zoo heev tsis tau siv zoo. Cov ntaub ntawv semiconductor tsuas yog ua lub luag haujlwm hauv kev hloov pauv photoelectric thiab tsis muaj kev sib txuas ntxiv nrog rau ib leeg, ua rau muaj kev ua haujlwm tsawg. Nyob rau hauv cov nqe lus ntawm kev siv tshwj xeeb, kev sib txuas ntawm lub teeb los ntawm lub teeb ci mus rau lithium niobate optical waveguide ua rau muaj kev poob loj thiab cov txheej txheem nruj. Tsis tas li ntawd, lub zog kho qhov muag tiag tiag ntawm lub teeb irradiated mus rau cov khoom siv semiconductor channel hauv thaj tsam sib txuas yog qhov nyuaj rau calibrate, uas txwv tsis pub nws qhov kev ua tau zoo.
Cov tsoosphotodetectorssiv rau kev siv duab yog feem ntau raws li cov khoom siv semiconductor. Yog li ntawd, rau lithium niobate, nws qhov tsawg lub teeb haum tus nqi thiab insulating zog ua rau nws undoubtedly tsis nyiam los ntawm photodetector soj ntsuam xyuas, thiab txawm ib tug nyuaj point nyob rau hauv lub tshav pob. 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 uas muaj zog lub teeb haum los yog zoo heev conductivity yuav heterogeneously integrated nrog lithium niobate los them rau nws cov shortcomings. Nyob rau tib lub sijhawm, tus kheej polarization induced pyroelectric yam ntxwv ntawm lithium niobate vim nws cov qauv anisotropy tuaj yeem tswj tau los ntawm kev hloov mus rau cov cua sov hauv lub teeb irradiation, yog li hloov cov yam ntxwv pyroelectric rau optoelectronic nrhiav pom. Cov nyhuv thermal no muaj qhov zoo ntawm kev dav dav thiab kev tsav tsheb ntawm tus kheej, thiab tuaj yeem ua tiav zoo thiab fused nrog lwm cov ntaub ntawv. Kev siv synchronous ntawm thermal thiab photoelectric teebmeem tau qhib lub sijhawm tshiab rau lithium niobate raws li photodetectors, ua kom cov khoom siv los ua ke cov txiaj ntsig zoo ntawm ob qho tib si. Thiab txhawm rau tsim kom muaj qhov tsis txaus thiab ua tiav kev sib koom ua ke ntawm qhov zoo, Nws yog qhov kev tshawb fawb hotspot nyob rau xyoo tas los no. Tsis tas li ntawd, kev siv ion implantation, band engineering, thiab tsis xws luag engineering kuj yog ib qho kev xaiv zoo los daws qhov teeb meem ntawm kev kuaj pom lithium niobate. Txawm li cas los xij, vim muaj kev ua haujlwm nyuaj ntawm lithium niobate, daim teb no tseem ntsib cov teeb meem loj xws li kev sib koom ua ke qis, cov khoom siv duab kos duab thiab cov tshuab, thiab kev ua haujlwm tsis txaus, uas muaj txiaj ntsig zoo rau kev tshawb fawb thiab chaw.

Daim duab 1, siv lub zog tsis xws luag hauv lub LN bandgap raws li cov chaw pabcuam hluav taws xob, cov neeg nqa khoom pub dawb yog tsim nyob rau hauv cov kab hluav taws xob hauv qab pom lub teeb pom kev zoo. Piv rau yav dhau los pyroelectric LN photodetectors, uas feem ntau txwv rau cov lus teb ceev ntawm ib ncig ntawm 100Hz, qhov noLN photodetectormuaj cov lus teb ceev ceev txog li 10kHz. Lub caij no, hauv txoj haujlwm no, nws tau pom tias magnesium ion doped LN tuaj yeem ua tiav lub teeb pom kev sab nraud nrog cov lus teb txog li 10kHz. Txoj haujlwm no txhawb nqa kev tshawb fawb txog kev ua haujlwm siab thiabKev kub ceev LN photodetectorsnyob rau hauv kev tsim kho ntawm kev ua haujlwm siab ib leeg-chip integrated LN photonic chips.
Hauv kev xaus, kev tshawb fawb teb ntawmnyias zaj duab xis lithium niobate photodetectorsmuaj qhov tseem ceeb scientific tseem ceeb thiab muaj peev xwm siv tau zoo heev. Nyob rau hauv lub neej yav tom ntej, nrog rau txoj kev loj hlob ntawm technology thiab kev sib sib zog nqus ntawm kev tshawb fawb, nyias zaj duab xis lithium niobate (LN) photodetectors yuav txhim kho mus rau ntau dua kev koom ua ke. Kev sib xyaw ua ke sib txawv kom ua tiav cov kev ua tau zoo, cov lus teb ceev ceev, thiab cov yeeb yaj kiab dav dav lithium niobate photodetectors hauv txhua qhov yuav dhau los ua qhov tseeb, uas yuav txhawb kev txhim kho ntawm kev sib koom ua ke ntawm on-chip thiab ntse sensing teb, thiab muab ntau txoj hauv kev rau cov tiam tshiab ntawm kev siv photonics.