I-Thin-film i-lithium tantalate (LTOI) impahla ivela njengamandla amasha abalulekile endimeni ye-optics ehlanganisiwe. Kulo nyaka, kushicilelwe imisebenzi embalwa esezingeni eliphezulu kumamojula we-LTOI, enamawafa e-LTOI ekhwalithi ephezulu ahlinzekwe nguSolwazi Xin Ou ovela e-Shanghai Institute of Microsystem and Information Technology, kanye nezinqubo zekhwalithi ephezulu zokunamathisela i-waveguide ezithuthukiswe iqembu likaSolwazi Kippenberg kwa-EPFL. , Switzerland. Imizamo yabo yokubambisana iye yabonisa imiphumela emangalisayo. Ukwengeza, amathimba abacwaningi abavela eNyuvesi yaseZhejiang eholwa nguSolwazi Liu Liu kanye neNyuvesi yaseHarvard eholwa uSolwazi Loncar nabo babike ngamamoduli e-LTOI anesivinini esikhulu, azinzile.
Njengesihlobo esiseduze sefilimu elincanyana i-lithium niobate (LNOI), i-LTOI igcina ukuguquguquka kwesivinini esiphezulu nezici zokulahlekelwa okuphansi kwe-lithium niobate kuyilapho inikezela ngezinzuzo ezifana nezindleko eziphansi, i-birefringence ephansi, kanye nemiphumela encishisiwe ye-photorefractive. Ukuqhathaniswa kwezici eziyinhloko zezinto ezimbili kuvezwa ngezansi.
◆ Ukufana phakathi kwe-Lithium Tantalate (LTOI) ne-Lithium Niobate (LNOI)
①I-Refractive Index:2.12 vs 2.21
Lokhu kusho ukuthi ubukhulu be-waveguide yemodi eyodwa, irediyasi egobayo, nosayizi bedivayisi abavamile abangenzi lutho abasuselwe kuzo zombili izinto zokusebenza ziyafana kakhulu, nokusebenza kwazo kokuhlanganisa i-fiber nakho kuyaqhathaniswa. Nge-waveguide etching enhle, zombili izinto ezisetshenziswayo zingafinyelela ukulahleka kokufakwa kwe<0.1 dB/cm. I-EPFL ibika ukulahleka kwe-waveguide okungu-5.6 dB/m.
②I-Electro-optic Coefficient:30.5 pm/V vs 30.9 pm/V
Ukusebenza kahle kokuguquguquka kuqhathaniswa kuzo zombili izinto zokwakha, ngokushintshashintsha okusekelwe kumphumela we-Pockels, okuvumela umkhawulokudonsa ophezulu. Njengamanje, amamoduli e-LTOI ayakwazi ukuzuza ukusebenza kwe-400G ngomzila ngamunye, ngomkhawulokudonsa owedlula i-110 GHz.
③I-Bandgap:3.93 eV vs 3.78 eV
Zombili izinto ezisetshenziswayo zinefasitela elisobala elibanzi, elisekela izinhlelo zokusebenza ukusuka kokubonakalayo kuye kumaza amaza e-infrared, ngaphandle kokumuncwa kumabhendi okuxhumana.
④I-Second-Order Nonlinear Coefficient (d33):21 pm/V vs 27pm/V
Uma isetshenziselwa izinhlelo zokusebenza ezingaqondile ezifana nesizukulwane sesibili se-harmonic (SHG), i-different-frequency generation (DFG), noma i-sum-frequency generation (SFG), ukuphumelela kokuguqulwa kwezinto ezimbili kufanele kufane ncamashi.
◆ Inzuzo Yezindleko ze-LTOI vs LNOI
①Izindleko Zokulungiselela I-wafer Ephansi
I-LNOI idinga ukufakwa kwe-He ion ukuze kuhlukaniswe ungqimba, olunokusebenza kahle kwe-ionization. Ngokuphambene, i-LTOI isebenzisa ukufakwa kwe-H ion ukuze kuhlukaniswe, okufana ne-SOI, ngokusebenza kahle kwe-delamination ngaphezu kwezikhathi eziyi-10 ngaphezu kwe-LNOI. Lokhu kubangela umehluko omkhulu wentengo wamawafa angu-6-intshi: $300 vs. $2000, ukwehla kwezindleko ngo-85%.
②Isivele isetshenziswa kabanzi emakethe ye-elekthronikhi yabathengi yezihlungi ze-acoustic(750,000 amayunithi ngonyaka, asetshenziswa Samsung, Apple, Sony, njll.).
◆ Izinzuzo Zokusebenza ze-LTOI vs LNOI
①Ukukhubazeka Kwezinto Ezimbalwa, Umphumela Wesithombe Obuthaka Kakhudlwana, Ukuqina Okwengeziwe
Ekuqaleni, amamoduli e-LNOI ayevame ukubonisa ukukhukhuleka kwephoyinti lokuchema, ngokuyinhloko ngenxa yokunqwabelana kweshaji okubangelwa amaphutha kusixhumi esibonakalayo se-waveguide. Uma ingelashwa, le mishini ingase ithathe usuku ukuzinza. Kodwa-ke, kwasungulwa izindlela ezihlukahlukene zokubhekana nalolu daba, njengokusebenzisa i-metal oxide cladding, i-substrate polarization, kanye ne-annealing, okwenza le nkinga ilawuleke kakhulu manje.
Ngokuphambene, i-LTOI inobuthakathaka obuncane bezinto ezibonakalayo, okuholela ekwehleni kakhulu kwezimo ze-drift. Ngisho nangaphandle kokucubungula okwengeziwe, indawo yayo yokusebenza ihlala izinzile. Imiphumela efanayo ibikwe yi-EPFL, i-Harvard, ne-Zhejiang University. Kodwa-ke, isiqhathaniso sivame ukusebenzisa ama-modulators e-LNOI angaphathwanga, okungenzeka angabi nobulungiswa ngokuphelele; ngokucutshungulwa, ukusebenza kwazo zombili izinto kungenzeka kufane. Umehluko omkhulu uku-LTOI edinga izinyathelo ezimbalwa zokucubungula ezengeziwe.
②I-Birefringence Ephansi: 0.004 vs 0.07
I-birefringence ephezulu ye-lithium niobate (LNOI) ingaba inselele ngezinye izikhathi, ikakhulukazi njengoba ukugoba kwe-waveguide kungabangela ukuhlanganisa imodi kanye nokuxutshwa kwemodi. Ku-LNOI ezacile, ukugoba ku-waveguide kungaguqula kancane ukukhanya kwe-TE kube ukukhanya kwe-TM, kube nzima ukwakhiwa kwamadivayisi athile angasetshenziswa, njengezihlungi.
Nge-LTOI, i-birefringence ephansi iqeda le nkinga, okungenzeka yenze kube lula ukuthuthukisa amadivaysi asebenzayo asebenzayo. I-EPFL iphinde yabika imiphumela ephawulekayo, ukusebenzisa i-LTOI's birefringence ephansi kanye nokungabikho kwemodi yokuwela ukuze kuzuzwe i-ultra-wide-wide-spectrum electro-optic comb frequency comb ngokulawula kokuhlakazwa okuyisicaba kulo lonke uhla lwe-spectral. Lokhu kuholele kumkhawulokudonsa wecomb ongu-450 nm ohlaba umxhwele onemigqa yekamu engaphezu kuka-2000, emikhulu ngokuphindwe kaningi kunalokho okungafinyelelwa nge-lithium niobate. Uma kuqhathaniswa nama-Kerr optical frequency combs, ama-electro-optic combs anikeza inzuzo yokungabi ne-threshold futhi azinze, nakuba edinga okokufaka kwe-microwave enamandla amakhulu.
③I-Higher Optical Damage Threshold
Umkhawulo womonakalo obonakalayo we-LTOI uphindwe kabili kunewe-LNOI, unikeza inzuzo ezinhlelweni ezingezona umugqa (kanye nezinhlelo zokusebenza ezingase zibe khona ze-Coherent Perfect Absorption (CPO) esikhathini esizayo). Amazinga wamanje wemojula ye-optical optical mancane amathuba okuthi alimaze i-lithium niobate.
④I-Low Raman Effect
Lokhu futhi kuphathelene nezinhlelo zokusebenza ezingaqondile. I-Lithium niobate inomphumela oqinile we-Raman, okuthi ku-Kerr optical optical comb applications kungaholela ekukhiqizeni ukukhanya kwe-Raman okungafunwa futhi kuzuze ukuncintisana, ukuvimbela ama-x-cut lithium niobate optical Combs ukuthi afinyelele kusimo se-soliton. Nge-LTOI, umphumela we-Raman ungacindezelwa nge-crystal orientation design, okuvumela i-x-cut LTOI ukufeza ukukhiqizwa kwe-soliton optical comb comb. Lokhu kunika amandla ukuhlanganiswa kwe-monolithic kwama-soliton optical combs anamamodulator anesivinini esikhulu, okuyisenzo esingenakufezwa nge-LNOI.
◆ Kungani Ithin-Film Lithium Tantate (LTOI) Ingazange Ikhulunywe Ngasekuqaleni?
I-Lithium tantalate inezinga lokushisa eliphansi le-Curie kune-lithium niobate (610°C vs. 1157°C). Ngaphambi kokuthuthukiswa kobuchwepheshe be-heterointegration (XOI), ama-modulators e-lithium niobate akhiqizwa kusetshenziswa i-titanium diffusion, edinga ukufakwa emanzini ngaphezu kuka-1000°C, okwenza i-LTOI ingafaneleki. Kodwa-ke, ngokushintshela kwanamuhla ekusebenziseni ama-substrates e-insulator kanye ne-waveguide etching ukuze kwenziwe imoduli, izinga lokushisa elingu-610°C Curie lingaphezu kokwanele.
◆ Ingabe i-Thin-Film Lithium Tantalate (LTOI) izothatha indawo ye-Thin-Film Lithium Niobate (TFLN)?
Ngokusekelwe ocwaningweni lwamanje, i-LTOI inikezela ngezinzuzo ekusebenzeni kancane, ukuzinza, kanye nezindleko zokukhiqiza ezinkulu, ngaphandle kokuphazamiseka okubonakalayo. Kodwa-ke, i-LTOI ayidluli i-lithium niobate ekusebenzeni kokushintshashintsha, futhi izinkinga zokuzinza ne-LNOI zinezixazululo ezaziwayo. Kumamojula okuxhumana e-DR, kunesidingo esincane sezingxenye ze-passive (futhi i-silicon nitride ingasetshenziswa uma kudingeka). Ukwengeza, utshalomali olusha luyadingeka ukuze kusungulwe kabusha izinqubo ze-wafer-level etching, amasu okuhlanganiswa kwe-heterointegration, nokuhlola ukwethembeka (ubunzima be-lithium niobate etching bekungeyona i-waveguide kodwa kuzuzwe i-wafer-level etching etching). Ngakho-ke, ukuncintisana nesikhundla esimisiwe se-lithium niobate, i-LTOI ingase idinge ukudalula ezinye izinzuzo. Ezifundweni, nokho, i-LTOI inikela ngamathuba abalulekile ocwaningo lwezinhlelo ezididiyelwe ze-on-chip, njenge-octave-spanning electro-optic Combs, i-PPLT, i-soliton kanye namadivayisi we-AWG we-wavelength division, kanye nama-modulators ahlukahlukene.
Isikhathi sokuthumela: Nov-08-2024