Lithium tantalate ee khafiifka ah (LTOI): Qalabka Xiga ee Xiga ee Modulators Xawaaraha Sare?

Walaxda lithium tantalate (LTOI) ee khafiifka ah ayaa u soo baxaysa sidii xoog cusub oo muhiim ah goobta isku dhafan ee indhaha. Sannadkan, dhowr shaqo oo heer sare ah oo ku saabsan modulators LTOI ayaa la daabacay, oo leh wafers tayo sare leh oo LTOI ah oo uu bixiyo Professor Xin Ou oo ka socda Machadka Microsystem iyo Tignoolajiyada Macluumaadka ee Shanghai, iyo habab tayo sare leh oo hagaha mawjada ah oo ay soo saareen kooxda Professor Kippenberg ee EPFL , Switzerland. Dadaalkooda iskaashiga ah ayaa soo bandhigay natiijooyin cajiib ah. Intaa waxaa dheer, kooxo cilmi-baaris ah oo ka socda Jaamacadda Zhejiang oo uu hoggaaminayo Professor Liu Liu iyo Jaamacadda Harvard oo uu hoggaamiyo Professor Loncar ayaa sidoo kale ka warbixiyay xawaaraha sare ee LTOI modulators.

Sida qaraabo dhow ee lithium niobate-filim khafiif ah (LNOI), LTOI waxay haysaa habaynta xawaaraha sare iyo sifooyinka khasaaraha hooseeya ee lithium niobate halka ay sidoo kale bixiso faa'iidooyinka sida qiimo jaban, birefringence hooseeya, iyo hoos u dhigista saamaynta sawir-qaadista. Isbarbardhigga sifooyinka ugu muhiimsan ee labada shay ayaa hoos lagu soo bandhigay.

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◆ Waxay u eg yihiin Lithium Tantalate (LTOI) iyo Lithium Niobate (LNOI)
Tusmada Dib-u-celinta:2.12 vs 2.21
Tani waxay tusinaysaa in cabbirada mawjadaha hal-habka ah, radius foorarsiga, iyo cabbirrada aaladaha dadban ee caadiga ah ee ku salaysan labada shay ay aad isugu dhow yihiin, iyo waxqabadkooda isku xidhka fiber-ka ayaa sidoo kale la barbar dhigi karaa. Marka la eego mawjada hagaha wanaagsan, labada walxoodba waxay gaari karaan khasaare gelinta<0.1 dB/cm EPFL waxay soo tebisay luminta waveguide 5.6 dB/m.

Iskuxidhka Electro-optic:30.5pm/V vs 30.9pm/V
Waxtarka wax-ku-oolnimada ayaa u dhigma labada shay, oo leh qaab-dhismeed ku salaysan saameynta Pockels, taas oo u oggolaanaysa xajmiga sare. Hadda, modulators LTOI waxay awood u leeyihiin inay gaaraan 400G waxqabad kasta oo haad ah, oo leh xajmiyeed ka badan 110 GHz.

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Bandgap:3.93 eV vs 3.78 eV
Labada walxoodba waxay leeyihiin daaqad daah-furan oo ballaadhan, oo kaalmaynaysa codsiyada laga soo bilaabo mawjadaha dhaadheer ee muuqda ilaa kuwa infrared-ka ah, oo aan wax nuug ah ku jirin xadhkaha isgaadhsiinta.

Dalabka Labaad ee aan toos ahayn isku xidhka (d33):21pm/V vs 27pm/V
Haddii loo isticmaalo codsiyada aan tooska ahayn sida jiilka labaad ee wada noolaanshaha (SHG), jiilka farqiga-soo noqnoqda (DFG), ama jiilka-soo noqnoqoshada (SFG), waxtarka beddelka ee labada shay waa inuu ahaadaa mid isku mid ah.

◆ Faa'iidada Kharashka ee LTOI vs LNOI
Kharashka Diyaarinta Waferka Hoose
LNOI waxay u baahan tahay in la geliyo ion He ion si loo kala saaro lakabka, kaas oo leh waxtarka ionization hooseeya. Taa beddelkeeda, LTOI waxay u isticmaashaa tallaalka H ion ee kala-soocidda, oo la mid ah SOI, oo leh waxtarka delamination in ka badan 10 jeer ka badan LNOI. Tani waxay keenaysaa farqi weyn oo qiimo ah oo loogu talagalay 6-inch wafers: $300 vs. $2000, 85% qiimo dhimis.

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Waxaa durba si weyn loogu isticmaalay suuqa macaamiisha elektiroonigga ah ee filtarrada dhawaaqa(750,000 unug sannadkii, oo ay isticmaalaan Samsung, Apple, Sony, iwm.).

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◆ Faa'iidooyinka Waxqabadka ee LTOI vs LNOI
Cilladaha Maaddada oo Yar, Saamaynta Sawir-qaadista oo daciif ah, Xasilooni badan
Markii hore, modulators LNOI waxay had iyo jeer soo bandhigaan eexda dhibicda, ugu horrayn waxaa sabab u ah ururinta lacag ururinta ee ay sababtay cilladaha is dhexgalka waveguide. Haddii aan la daawayn, aaladahani waxay qaadan karaan ilaa hal maalin si ay u dejiyaan. Si kastaba ha ahaatee, habab kala duwan ayaa la sameeyay si arrintan wax looga qabto, sida isticmaalka birta oxide cladding, substrate polarization, iyo annealing, taasoo ka dhigaysa dhibaatadan in si weyn loo maareyn karo hadda.
Taas bedelkeeda, LTOI waxay leedahay cillado shay oo yar, taasoo horseedaysa inay si weyn hoos ugu dhacdo ifafaalaha leexashada. Xataa iyada oo aan habayn dheeri ah la helin, barta ay ka shaqeyso ayaa weli ah mid deggan. Natiijooyin la mid ah ayaa waxaa ka warbixiyay EPFL, Harvard, iyo Jaamacadda Zhejiang. Si kastaba ha ahaatee, isbarbardhigga ayaa inta badan isticmaala modulators LNOI oo aan la daweyn, kuwaas oo laga yaabo in aan gebi ahaanba cadaalad ah; Marka la farsameeyo, waxqabadka labada shayba waxay u badan tahay inay isku mid yihiin. Farqiga ugu weyni wuxuu ku jiraa LTOI oo u baahan in yar oo tillaabooyinka habaynta ah.

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Farqiga Hoose: 0.004 vs 0.07
Kala-soocida sare ee lithium niobate (LNOI) waxay noqon kartaa mid adag mararka qaarkood, gaar ahaan sida leexinta waveguide ay sababi karto isku xidhka qaabka iyo isku-dhafka qaabka. LNOI dhuuban, qalooca ku jira waveguide wuxuu qayb ahaan u rogi karaa iftiinka TE iftiinka TM, taasoo adkeynaysa samaynta aaladaha dadban qaarkood, sida filtarrada.
Iyadoo LTOI, birefringence hoose ayaa meesha ka saaraysa arrintan, taasoo suurtogal ka dhigaysa in ay sahlanaato in la horumariyo qalabka wax-qabadka sare leh. EPFL waxa kale oo ay ka warbixisay natiijooyin la taaban karo, iyada oo ka faa'iidaysanaysa birefringing hoose ee LTOI iyo maqnaanshaha hab-gudbinta si loo gaadho abuuritaanka shanlo-soo noqnoqda ee ultra-ballaaran ee koronto-optic oo leh xakamayn fidsan oo fidsan oo dhinacyo badan leh. Tani waxay keentay xadhkaha shanlada 450 nm oo cajiib ah oo leh in ka badan 2000 oo xariiqyo shanlo ah, dhawr jeer ka weyn waxa lagu heli karo lithium niobate. Marka la barbar dhigo shanlooyinka soo noqnoqda indhaha ee Kerr, shanlooyinka korantada-optic-ga waxay bixiyaan faa'iidada inay noqdaan kuwa bilaa xad ah oo xasiloon, in kasta oo ay u baahan yihiin gelin microwave awood sare leh.

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Heerka Burburka Aragga Sare
Xadka waxyeelada indhaha ee LTOI waa laba jeer ka LNOI, taasoo bixisa faa'iido codsiyada aan tooska ahayn (iyo codsiyada suurtagalka ah ee nuugista qumman ee mustaqbalka (CPO)). Heerarka korantada moduleka indhaha ee hadda lagama yaabo inay dhaawacdo lithium niobate.
Saamaynta Raman Low
Tani waxay sidoo kale khuseysaa codsiyada aan tooska ahayn. Lithium niobate waxay leedahay saamayn xoog leh oo Raman ah, taas oo ku jirta codsiyada shanlada indhaha ee Kerr waxay u horseedi kartaa jiilka iftiinka Raman ee aan la rabin oo uu kasbado tartan, ka hortagaya x-cut lithium niobate shanlooyinka inta jeer ee indhaha inay gaaraan gobolka soliton. Iyadoo LTOI, saamaynta Raman lagu xakamayn karaa iyada oo loo marayo design hanuunin crystal, jidaynayey x-cut LTOI si ay u gaaraan soliton soo noqnoqda shanlada indhaha. Tani waxay awood u siinaysaa is dhexgalka monolithic ee shanlooyinka soo noqnoqda indhaha ee soliton oo leh modulators xawaare sare leh, oo ah wax aan lagu guulaysan karin LNOI.
◆ Waa maxay sababta aan horay loogu xusin filimka khafiifka ah ee Lithium Tantalate (LTOI)?
Lithium tantalate wuxuu leeyahay heerkul ka hooseeya Curie marka loo eego lithium niobate (610°C vs. 1157°C). Kahor horumarinta tignoolajiyada heterointegration (XOI), modulators lithium niobate ayaa la soo saaray iyadoo la adeegsanayo fidinta titanium, taas oo u baahan in la tirtiro in ka badan 1000 ° C, taasoo ka dhigaysa LTOI mid aan ku habboonayn. Si kastaba ha ahaatee, isbedelka maanta ee isticmaalka substrates-ka-daahiyaha iyo waveguide etching samaynta modulator, heerkulka 610°C Curie ayaa ka badan ku filan.
◆ Filimka khafiifka ah Lithium Tantalate (LTOI) ma bedeli doonaa filim khafiif ah Lithium Niobate (TFLN)?
Iyada oo ku saleysan cilmi-baarista hadda, LTOI waxay bixisaa faa'iidooyin waxqabadka dadban, xasilloonida, iyo kharashka wax-soo-saarka ballaaran, oo aan lahayn dib-u-dhacyo muuqda. Si kastaba ha ahaatee, LTOI kama dhaafo lithium niobate waxqabadka qaabaynta, iyo arrimaha xasiloonida ee LNOI waxay ogaadeen xalal. Qaybaha isgaarsiinta ee DR-ka, waxaa jira baahi yar oo loo qabo qaybaha dadban (iyo nitride silicon waa la isticmaali karaa haddii loo baahdo). Intaa waxaa dheer, maalgashi cusub ayaa loo baahan yahay si dib loogu yagleelo hababka etching heerka wafer, farsamooyinka isdhexgalka kala duwan, iyo tijaabinta isku halaynta (dhibaatka lithium niobate etching ma ahayn mawjadaha laakiin gaaritaanka heerka wafer-soosaarka sare etching). Sidaa darteed, si loola tartamo booska la aasaasay ee lithium niobate, LTOI waxa laga yaabaa inay u baahato inay daaha ka qaado faa'iidooyin dheeraad ah. Tacliin ahaan, si kastaba ha ahaatee, LTOI waxay bixisaa awood cilmi baaris oo muhiim ah oo loogu talagalay nidaamyada isku-dhafka ah ee chip-ka, sida shanlooyinka korantada-optic-ka octave-ballaaran, PPLT, soliton iyo AWG qalabyada qaybinta mawjadaha, iyo habab-qaabeeya.


Waqtiga boostada: Nov-08-2024