Nyob rau xyoo tas los no, cov kws tshawb fawb los ntawm ntau lub teb chaws tau siv cov photonics sib xyaw ua ke los ua kom pom tseeb txog kev tswj hwm ntawm cov teeb infrared thiab siv rau cov tes hauj lwm ceev ceev 5G, cov sensors chip, thiab cov tsheb tsav tsheb. Tam sim no, nrog rau kev tshawb fawb tob zuj zus, cov kws tshawb fawb tau pib ua qhov kev tshawb nrhiav tob tob ntawm cov teeb pom kev luv luv thiab tsim cov ntawv thov dav dua, xws li chip-level LIDAR, AR / VR / MR (txhim kho / virtual / hybrid) Reality) Cov tsom iav, cov zaub holographic, cov chips ua quantum, optogenetic probes implanted hauv lub hlwb, thiab lwm yam.
Qhov kev koom ua ke loj ntawm cov khoom siv kho qhov muag theem modulators yog lub hauv paus ntawm lub tshuab kho qhov muag rau kev teeb tsa optical ntawm on-chip thiab kev tsim cov wavefront dawb. Ob lub luag haujlwm tseem ceeb no yog qhov tseem ceeb rau kev ua tiav ntawm ntau yam kev siv. Txawm li cas los xij, rau cov khoom siv kho qhov muag theem hauv qhov pom kev, nws yog qhov nyuaj tshwj xeeb kom ua tau raws li qhov yuav tsum tau ua ntawm kev xa tawm siab thiab kev hloov pauv siab tib lub sijhawm. Txhawm rau kom ua tau raws li qhov yuav tsum tau ua no, txawm tias cov khoom siv silicon nitride thiab lithium niobate uas tsim nyog tshaj plaws yuav tsum tau nce qhov ntim thiab kev siv hluav taws xob.
Txhawm rau daws qhov teeb meem no, Michal Lipson thiab Nanfang Yu ntawm Columbia University tau tsim lub silicon nitride thermo-optic phase modulator raws li adiabatic micro-ring resonator. Lawv tau ua pov thawj tias lub micro-ring resonator ua haujlwm hauv lub xeev sib txuas muaj zog. Lub cuab yeej tuaj yeem ua tiav theem modulation nrog qhov poob tsawg kawg nkaus. Piv nrog cov waveguide theem modulators, lub cuab yeej muaj tsawg kawg yog qhov kev txiav txim ntawm qhov loj me txo qis hauv qhov chaw thiab kev siv hluav taws xob. Cov ntsiab lus cuam tshuam tau luam tawm hauv Nature Photonics.
Michal Lipson, tus kws tshaj lij hauv kev sib xyaw ua ke ntawm photonics, raws li silicon nitride, tau hais tias: "Qhov tseem ceeb rau peb qhov kev daws teeb meem yog siv lub tshuab resonator optical thiab ua haujlwm hauv lub xeev sib txuas muaj zog."
Lub tshuab kho qhov muag resonator yog ib qho qauv sib npaug zoo heev, uas tuaj yeem hloov qhov hloov pauv me me ntawm refractive index mus rau hauv qhov hloov pauv theem los ntawm ntau lub voj voog ntawm lub teeb beams. Feem ntau, nws tuaj yeem muab faib ua peb lub xeev ua haujlwm sib txawv: "under coupling" thiab "under coupling." Critical coupling "thiab" strong coupling. Ntawm lawv, "under coupling" tsuas yog muab cov theem modulation tsawg thiab yuav ua rau muaj kev hloov pauv amplitude tsis tsim nyog, thiab "critical coupling" yuav ua rau muaj kev poob optical loj, yog li cuam tshuam rau kev ua haujlwm tiag tiag ntawm lub cuab yeej.
Yuav kom ua tiav qhov kev hloov kho theem 2π thiab qhov hloov pauv tsawg kawg nkaus, pab pawg tshawb fawb tau tswj hwm lub microring hauv lub xeev "kev sib txuas muaj zog". Lub zog sib txuas ntawm lub microring thiab "bus" yog tsawg kawg yog kaum npaug ntau dua li qhov poob ntawm microring. Tom qab ntau qhov kev tsim thiab kev ua kom zoo dua, qhov qauv kawg tau pom hauv daim duab hauv qab no. Qhov no yog lub nplhaib resonant nrog qhov dav tapered. Lub waveguide nqaim txhim kho lub zog sib txuas optical ntawm "bus" thiab micro-coil. Lub waveguide dav Lub teeb poob ntawm microring raug txo los ntawm kev txo qhov kev tawg ntawm lub sidewall.
Heqing Huang, tus sau thawj zaug ntawm daim ntawv no, kuj tau hais tias: "Peb tau tsim ib lub modulator me me, txuag hluav taws xob, thiab tsis tshua muaj kev poob qis uas pom tau lub teeb pom kev zoo nrog lub vojvoog tsuas yog 5 μm thiab lub zog siv π-phase modulation tsuas yog 0.8 mW. Qhov sib txawv ntawm qhov siab tau qhia tsawg dua 10%. Qhov tsis tshua muaj yog tias lub modulator no zoo ib yam rau cov kab xiav thiab ntsuab nyuaj tshaj plaws hauv cov spectrum pom."
Nanfang Yu kuj tau taw qhia tias txawm hais tias lawv tseem tsis tau mus txog theem kev sib koom ua ke ntawm cov khoom siv hluav taws xob, lawv txoj haujlwm tau ua rau qhov sib txawv ntawm cov photonic switches thiab cov electronic switches nqaim dua. "Yog tias cov thev naus laus zis modulator yav dhau los tsuas yog tso cai rau kev sib koom ua ke ntawm 100 waveguide phase modulators muab qee qhov chip footprint thiab lub zog siv nyiaj, ces peb tam sim no tuaj yeem sib koom ua ke 10,000 theem shifters ntawm tib lub chip kom ua tiav ntau yam haujlwm nyuaj dua."
Hauv ntej, txoj kev tsim qauv no tuaj yeem siv rau cov electro-optic modulators kom txo qhov chaw nyob thiab kev siv hluav taws xob. Nws kuj tseem siv tau rau lwm yam spectral ranges thiab lwm yam kev tsim resonator sib txawv. Tam sim no, pab pawg tshawb fawb tab tom koom tes los qhia txog cov spectrum LIDAR pom uas muaj cov theem hloov pauv raws li cov microrings zoo li no. Yav tom ntej, nws kuj tseem tuaj yeem siv rau ntau daim ntawv thov xws li kev txhim kho optical nonlinearity, lasers tshiab, thiab quantum optics tshiab.
Qhov chaw ntawm tsab xov xwm: https://mp.weixin.qq.com/s/O6iHstkMBPQKDOV4CoukXA
Beijing Rofea Optoelectronics Co., Ltd. nyob hauv Suav teb "Silicon Valley" - Beijing Zhongguancun, yog ib lub tuam txhab high-tech uas mob siab rau kev pabcuam rau cov tsev kawm ntawv tshawb fawb hauv tsev thiab txawv teb chaws, cov tsev kawm ntawv tshawb fawb, cov tsev kawm qib siab thiab cov neeg ua haujlwm tshawb fawb txog kev lag luam. Peb lub tuam txhab feem ntau koom nrog kev tshawb fawb thiab kev txhim kho ywj pheej, tsim qauv, tsim khoom, muag khoom ntawm cov khoom optoelectronic, thiab muab cov kev daws teeb meem tshiab thiab kev pabcuam tus kheej rau cov kws tshawb fawb thiab cov kws ua haujlwm hauv kev lag luam. Tom qab ntau xyoo ntawm kev tsim kho tshiab ywj pheej, nws tau tsim cov khoom lag luam photoelectric nplua nuj thiab zoo meej, uas siv dav hauv nroog, tub rog, kev thauj mus los, hluav taws xob, nyiaj txiag, kev kawm, kev kho mob thiab lwm yam lag luam.
Peb tab tom nrhiav rau pem hauv ntej rau kev koom tes nrog koj!
Lub sijhawm tshaj tawm: Lub Peb Hlis-29-2023