Kev Taw Qhia
Tau txais kev tshoov siab los ntawm kev vam meej ntawm cov hluav taws xob sib xyaw ua ke (EICs), thaj chaw ntawm photonic integrated circuits (PICs) tau hloov pauv txij li thaum nws pib xyoo 1969. Txawm li cas los xij, tsis zoo li EICs, kev tsim kho ntawm lub platform thoob ntiaj teb uas muaj peev xwm txhawb nqa ntau yam kev siv photonic tseem yog qhov kev sib tw loj. Tsab xov xwm no tshawb nrhiav cov thev naus laus zis Lithium Niobate on Insulator (LNOI) tshiab, uas tau dhau los ua qhov kev daws teeb meem zoo rau PICs tiam tom ntej.
Kev Sawv Ntxov ntawm LNOI Technology
Lithium niobate (LN) tau ntev los lawm tau lees paub tias yog cov khoom siv tseem ceeb rau kev siv photonic. Txawm li cas los xij, tsuas yog nrog kev tshwm sim ntawm cov yeeb yaj kiab nyias LNOI thiab cov txheej txheem tsim khoom siab heev nws thiaj li qhib tau tag nrho nws lub peev xwm. Cov kws tshawb fawb tau ua tiav qhia txog ultra-low-loss ridge waveguides thiab ultra-high-Q microresonators ntawm LNOI platforms [1], cim qhov kev dhia tseem ceeb hauv kev sib xyaw ua ke photonics.
Cov txiaj ntsig tseem ceeb ntawm LNOI Technology
- Kev poob qis ntawm qhov muag pom kev zoo heev(qis li 0.01 dB/cm2)
- Cov qauv nanophotonic zoo
- Kev txhawb nqa rau ntau yam txheej txheem kho qhov muag tsis sib xws
- Kev sib xyaw ua ke ntawm electro-optic (EO) tunability
Cov Txheej Txheem Optical Nonlinear ntawm LNOI
Cov qauv nanophotonic ua tau zoo heev uas tsim los ntawm lub platform LNOI ua rau muaj peev xwm ua tiav cov txheej txheem tseem ceeb ntawm nonlinear optical nrog kev ua haujlwm zoo kawg thiab lub zog twj tso kua mis tsawg kawg nkaus. Cov txheej txheem ua pov thawj suav nrog:
- Thib Ob Lub Cim Harmonic (SHG)
- Kev Tsim Zaus Sib Npaug (SFG)
- Kev Tsim Zaus Sib Txawv (DFG)
- Kev Hloov Pauv Parametric Down-Conversion (PDC)
- Kev Sib Xyaws Plaub Ntug (FWM)
Ntau yam kev sib phim theem tau siv los ua kom zoo dua cov txheej txheem no, tsim kom muaj LNOI ua lub platform optical nonlinear uas muaj ntau yam siv tau.
Cov Khoom Siv Sib Koom Ua Ke Electro-Optically Tunable
Kev siv tshuab LNOI kuj tau ua rau muaj kev tsim ntau yam khoom siv photonic uas siv tau thiab siv tau yooj yim, xws li:
- Cov modulators optical ceev ceev
- Cov PICs uas hloov kho tau ntau yam
- Cov zuag sib txawv uas hloov tau zaus
- Cov caij nplooj ntoos hlav micro-optomechanical
Cov khoom siv no siv cov khoom EO intrinsic ntawm lithium niobate los ua kom tiav qhov kev tswj hwm lub teeb ci ntsa iab thiab ceev ceev.
Cov Kev Siv Ua Haujlwm ntawm LNOI Photonics
Cov PICs raws li LNOI tam sim no tau raug siv rau hauv ntau qhov kev siv ua haujlwm, suav nrog:
- Cov hloov pauv microwave-rau-optical
- Cov khoom siv kho qhov muag
- Cov spectrometers hauv-chip
- Cov plaub hau sib txuas lus zaus
- Cov txheej txheem sib txuas lus siab heev
Cov ntawv thov no qhia txog lub peev xwm ntawm LNOI los phim qhov kev ua tau zoo ntawm cov khoom siv kho qhov muag loj, thaum muab cov kev daws teeb meem uas siv tau ntau qhov chaw thiab siv hluav taws xob tau zoo los ntawm kev tsim cov duab photolithographic.
Cov Teeb Meem Tam Sim No thiab Cov Lus Qhia Yav Tom Ntej
Txawm hais tias nws muaj kev vam meej zoo los xij, LNOI thev naus laus zis ntsib ntau yam teeb meem kev siv tshuab:
a) Txo Qhov Muag Poob Ntxiv
Qhov poob ntawm waveguide tam sim no (0.01 dB/cm2) tseem siab dua qhov txwv ntawm kev nqus cov khoom. Kev nce qib hauv cov txheej txheem ion-slicing thiab nanofabrication yog qhov xav tau los txo qhov roughness ntawm qhov chaw thiab qhov tsis zoo ntawm kev nqus.
b) Kev Tswj Xyuas Waveguide Geometry Zoo Dua
Kev ua kom cov waveguides hauv qab 700 nm thiab cov qhov sib txuas hauv qab 2 μm yam tsis muaj kev txi qhov rov ua dua lossis nce qhov poob ntawm kev nthuav dav yog qhov tseem ceeb rau kev sib koom ua ke ntau dua.
c) Txhim Kho Kev Ua Haujlwm Zoo ntawm Coupling
Thaum cov fibers tapered thiab cov hloov pauv hom pab ua tiav kev sib txuas ua haujlwm siab, cov txheej txheem tiv thaiv kev cuam tshuam tuaj yeem txo qhov kev cuam tshuam ntawm huab cua-khoom siv.
d) Kev Tsim Kho Cov Cheebtsam Polarization Uas Tsis Poob Qis
Cov khoom siv photonic uas tsis muaj kev cuam tshuam polarization ntawm LNOI yog qhov tseem ceeb, xav tau cov khoom uas phim cov kev ua tau zoo ntawm cov polarizers dawb.
e) Kev Sib Koom Tes ntawm Cov Khoom Siv Hluav Taws Xob Tswj
Kev koom ua ke cov khoom siv hluav taws xob loj loj yam tsis muaj kev puas tsuaj rau kev ua haujlwm ntawm lub teeb yog qhov kev tshawb fawb tseem ceeb.
f) Kev Sib Tw Qib Siab thiab Kev Tsim Kho Kev Sib Nraus
Kev tsim cov qauv sau ntawv txhim khu kev qha ntawm qhov kev daws teeb meem sub-micron yog qhov tseem ceeb rau cov nonlinear optics tab sis tseem yog ib qho thev naus laus zis tsis tau paub tab ntawm LNOI platform.
g) Kev Them Nyiaj Rau Cov Kev Ua Tsis Zoo ntawm Kev Tsim Khoom
Cov txheej txheem los txo qhov kev hloov pauv theem uas tshwm sim los ntawm kev hloov pauv ib puag ncig lossis kev hloov pauv ntawm kev tsim khoom yog qhov tseem ceeb rau kev xa tawm hauv ntiaj teb tiag.
h) Kev Sib Txuas Ntau Lub Chip Zoo
Kev daws teeb meem kev sib txuas zoo ntawm ntau lub LNOI chips yog qhov tsim nyog los nthuav dav dhau qhov kev txwv kev koom ua ke ntawm ib lub wafer.
Kev Sib Koom Ua Ib Leeg ntawm Cov Cheebtsam Nquag thiab Passive
Ib qho teeb meem tseem ceeb rau LNOI PICs yog kev sib koom ua ke ntawm cov khoom siv nquag thiab cov khoom siv tsis siv neeg xws li:
- Cov tshuab laser
- Cov khoom ntes
- Cov hloov pauv wavelength tsis sib xws
- Cov Modulators
- Cov Multiplexers / Demultiplexers
Cov tswv yim tam sim no suav nrog:
a) Ion Doping ntawm LNOI:
Kev xaiv cov doping ntawm cov ions nquag mus rau hauv cov cheeb tsam xaiv tuaj yeem ua rau muaj cov teeb pom kev zoo ntawm lub nti.
b) Kev Sib Txuas thiab Kev Sib Koom Ua Ke:
Kev sib txuas ua ntej passive LNOI PICs nrog cov txheej LNOI doped lossis III-V lasers muab lwm txoj hauv kev.
c) Kev Tsim Khoom Siv Hybrid Active/Passive LNOI Wafer:
Ib txoj hauv kev tshiab suav nrog kev sib txuas cov wafers LN uas tau doped thiab undoped ua ntej ion slicing, ua rau LNOI wafers nrog ob qho tib si thaj chaw nquag thiab thaj chaw tsis nquag.
Daim Duab 1piav qhia txog lub tswv yim ntawm kev sib xyaw ua ke ntawm cov PICs uas nquag / tsis nquag, qhov twg ib qho txheej txheem lithographic ua rau muaj kev sib dhos thiab kev koom ua ke ntawm ob hom khoom.
Kev koom ua ke ntawm Photodetectors
Kev koom ua ke cov photodetectors rau hauv LNOI-based PICs yog lwm kauj ruam tseem ceeb rau kev ua haujlwm tag nrho. Ob txoj hauv kev tseem ceeb tab tom tshawb nrhiav:
a) Kev Sib Koom Ua Ke Sib Txawv:
Cov qauv nanostructures semiconductor tuaj yeem txuas nrog LNOI waveguides ib ntus. Txawm li cas los xij, kev txhim kho hauv kev ua haujlwm ntawm kev kuaj pom thiab kev nthuav dav tseem xav tau.
b) Kev Hloov Pauv Wavelength Tsis Yog Linear:
Cov khoom nonlinear ntawm LN tso cai rau kev hloov pauv zaus hauv cov waveguides, ua rau siv tau cov qauv silicon photodetectors tsis hais txog qhov wavelength ua haujlwm.
Xaus lus
Kev nce qib sai ntawm thev naus laus zis LNOI coj kev lag luam los ze rau lub platform PIC thoob ntiaj teb uas muaj peev xwm pabcuam ntau yam kev siv. Los ntawm kev daws cov teeb meem uas twb muaj lawm thiab thawb cov kev tsim kho tshiab hauv kev sib koom ua ke thiab kev ntes, LNOI-based PICs muaj peev xwm hloov pauv cov teb xws li kev sib txuas lus, cov ntaub ntawv quantum, thiab kev ntsuas.
LNOI tuav cov lus cog tseg ntawm kev ua tiav lub zeem muag ntev ntawm scalable PICs, phim qhov kev vam meej thiab kev cuam tshuam ntawm EICs. Kev siv zog R&D txuas ntxiv mus—xws li cov los ntawm Nanjing Photonics Process Platform thiab XiaoyaoTech Design Platform—yuav yog qhov tseem ceeb hauv kev tsim lub neej yav tom ntej ntawm kev sib xyaw ua ke photonics thiab qhib cov cib fim tshiab thoob plaws thaj chaw thev naus laus zis.
Lub sijhawm tshaj tawm: Lub Xya Hli-18-2025