Ke kū mai nei ka mea lithium tantalate lahilahi (LTOI) ma ke ʻano he mana hou koʻikoʻi i ke kahua optics i hoʻohui ʻia. I kēia makahiki, ua paʻi ʻia kekahi mau hana kiʻekiʻe ma nā modulators LTOI, me nā wafers LTOI kiʻekiʻe i hāʻawi ʻia e Polofesa Xin Ou mai ka Shanghai Institute of Microsystem and Information Technology, a me nā kaʻina hana etching waveguide kiʻekiʻe i hoʻomohala ʻia e ka hui o Polofesa Kippenberg ma EPFL, Switzerland. Ua hōʻike kā lākou hana hui pū ʻana i nā hopena kupaianaha. Eia kekahi, ua hōʻike pū nā hui noiʻi mai ke Kulanui ʻo Zhejiang i alakaʻi ʻia e Polofesa Liu Liu a me ke Kulanui ʻo Harvard i alakaʻi ʻia e Polofesa Loncar e pili ana i nā modulators LTOI wikiwiki a paʻa.
Ma ke ʻano he hoahānau pili loa o ka lithium niobate lahilahi-kiʻi (LNOI), mālama ʻo LTOI i nā ʻano modulation wikiwiki a me nā ʻano pohō haʻahaʻa o ka lithium niobate ʻoiai e hāʻawi pū ana i nā pono e like me ke kumukūʻai haʻahaʻa, ka birefringence haʻahaʻa, a me nā hopena photorefractive i hoʻemi ʻia. Hōʻike ʻia kahi hoʻohālikelike o nā ʻano nui o nā mea ʻelua ma lalo nei.
◆ Nā ʻano like ma waena o Lithium Tantalate (LTOI) a me Lithium Niobate (LNOI)
①Papa Kuhikuhi Refractive:2.12 e kūʻē i ka 2.21
ʻO ke ʻano o kēia, ua like loa nā ana o ke alakaʻi nalu hoʻokahi-ʻano, ka radius kūlou, a me nā nui o nā mea hana passive maʻamau e pili ana i nā mea ʻelua, a ua like pū kā lākou hana hoʻopili fiber. Me ke kālai ʻana o ke alakaʻi nalu maikaʻi, hiki i nā mea ʻelua ke hoʻokō i kahi pohō hoʻokomo o<0.1 dB/cm. Hōʻike ʻo EPFL i kahi pohō alakaʻi nalu o 5.6 dB/m.
②Ka helu hana electro-optic:30.5 pm/V vs 30.9 pm/V
Ua like ka pono o ka modulation no nā mea ʻelua, me ka modulation e pili ana i ka hopena Pockels, e ʻae ana i ka bandwidth kiʻekiʻe. I kēia manawa, hiki i nā modulators LTOI ke hoʻokō i ka hana 400G no kēlā me kēia laina, me ka bandwidth e ʻoi aku ana ma mua o 110 GHz.
③Pākuʻi:3.93 eV e kū'ē i ka 3.78 eV
Loaʻa i nā mea ʻelua kahi puka aniani ākea, e kākoʻo ana i nā noi mai nā nalu ʻike ʻia a i nā nalu infrared, me ka ʻole o ka omo ʻana i nā kāʻei kamaʻilio.
④Ka helu ʻole laina lua (d33):21 pm/V vs 27 pm/V
Inā hoʻohana ʻia no nā noi nonlinear e like me ka hanauna harmonic ʻelua (SHG), ka hanauna alapine-ʻokoʻa (DFG), a i ʻole ka hanauna alapine-hōʻuluʻulu (SFG), pono e like loa ka pono o ka hoʻololi ʻana o nā mea ʻelua.
◆ Pōmaikaʻi o ke kumukūʻai o LTOI vs LNOI
①Kumukūʻai Hoʻomākaukau Wafer Haʻahaʻa
Pono ʻo LNOI i ka hoʻokomo ʻana o ka ion He no ka hoʻokaʻawale ʻana i ka papa, kahi haʻahaʻa ka pono o ka ionization. I ka hoʻohālikelike ʻana, hoʻohana ʻo LTOI i ka hoʻokomo ʻana o ka ion H no ka hoʻokaʻawale ʻana, e like me SOI, me ka pono o ka delamination ma mua o 10 mau manawa ʻoi aku ka kiʻekiʻe ma mua o LNOI. ʻO ka hopena kēia i kahi ʻokoʻa kumukūʻai koʻikoʻi no nā wafers 6-'īniha: $300 vs. $2000, he 85% ka emi ʻana o ke kumukūʻai.
②Ua hoʻohana nui ʻia ia ma ka mākeke uila mea kūʻai aku no nā kānana acoustic(750,000 mau ʻāpana i kēlā me kēia makahiki, hoʻohana ʻia e Samsung, Apple, Sony, a pēlā aku).
◆ Nā Pōmaikaʻi Hana o LTOI vs LNOI
①ʻOi aku ka liʻiliʻi o nā kīnā o ka mea, ʻoi aku ka nāwaliwali o ka hopena photorefractive, ʻoi aku ka paʻa
I ka wā mua, ua hōʻike pinepine nā modulators LNOI i ka bias point drift, ma muli o ka hōʻiliʻili ʻana o ka uku i hoʻokumu ʻia e nā hemahema ma ka interface waveguide. Inā ʻaʻole mālama ʻia, hiki i kēia mau mea hana ke hoʻopaʻa a hiki i hoʻokahi lā. Eia nō naʻe, ua hoʻomohala ʻia nā ʻano hana like ʻole e hoʻoponopono ai i kēia pilikia, e like me ka hoʻohana ʻana i ka metal oxide cladding, substrate polarization, a me ka annealing, e hoʻolilo ana i kēia pilikia i mea hiki ke hoʻokele nui ʻia i kēia manawa.
I ka hoʻohālikelike ʻana, ʻoi aku ka liʻiliʻi o nā hemahema o ka LTOI, e alakaʻi ana i ka emi nui ʻana o nā hanana drift. ʻOiai me ka ʻole o ka hana hou ʻana, ua paʻa mau kona kiko hana. Ua hōʻike ʻia nā hopena like e EPFL, Harvard, a me ke Kulanui ʻo Zhejiang. Eia nō naʻe, hoʻohana pinepine ka hoʻohālikelike i nā modulators LNOI i mālama ʻole ʻia, ʻaʻole paha e kūpono loa; me ka hana ʻana, ua like paha ka hana o nā mea ʻelua. ʻO ka ʻokoʻa nui ma LTOI e koi ana i nā ʻanuʻu hana hou aʻe.
②ʻO ka Birefringence haʻahaʻa: 0.004 vs 0.07
Hiki i ke kiʻekiʻe o ka birefringence o ka lithium niobate (LNOI) ke paʻakikī i kekahi manawa, ʻoiai hiki i nā kūlou waveguide ke hana i ka hoʻopili ʻana o ke ʻano a me ka hybridization mode. I loko o ka LNOI lahilahi, hiki i kahi kūlou i loko o ka waveguide ke hoʻololi hapa i ka mālamalama TE i ka mālamalama TM, e hoʻopilikia ana i ka hana ʻana o kekahi mau mea passive, e like me nā kānana.
Me LTOI, hoʻopau ka birefringence haʻahaʻa i kēia pilikia, e maʻalahi ai ka hoʻomohala ʻana i nā mea hana passive hana kiʻekiʻe. Ua hōʻike pū ʻo EPFL i nā hopena koʻikoʻi, e hoʻohana ana i ka birefringence haʻahaʻa o LTOI a me ka ʻole o ke ʻano-crossing e hoʻokō ai i ka hanauna hui alapine electro-optic ultra-wide-spectrum me ka mana hoʻopuehu pālahalaha ma kahi ākea spectral. Ua hopena kēia i kahi bandwidth hui 450 nm kupaianaha me nā laina hui ma mua o 2000, he nui nā manawa ʻoi aku ka nui ma mua o ka mea hiki ke hoʻokō ʻia me ka lithium niobate. Ke hoʻohālikelike ʻia me nā hui alapine optical Kerr, hāʻawi nā hui electro-optic i ka pono o ka ʻole o ka paepae a ʻoi aku ka paʻa, ʻoiai lākou e koi ana i kahi hoʻokomo microwave mana kiʻekiʻe.
③Paepae Poino Optical Kiʻekiʻe
ʻO ka paepae hōʻino optical o LTOI he pālua ia o LNOI, e hāʻawi ana i kahi pono i nā noi nonlinear (a me nā noi Coherent Perfect Absorption (CPO) i ka wā e hiki mai ana). ʻAʻole paha e hōʻino nā pae mana module optical o kēia manawa i ka lithium niobate.
④Ka hopena Raman haʻahaʻa
Pili pū kēia i nā noi nonlinear. Loaʻa i ka Lithium niobate kahi hopena Raman ikaika, kahi i loko o nā noi Kerr optical frequency comb hiki ke alakaʻi i ka hanauna kukui Raman makemake ʻole ʻia a loaʻa ka hoʻokūkū, e pale ana i nā x-cut lithium niobate optical frequency combs mai ka hiki ʻana i ke kūlana soliton. Me LTOI, hiki ke kāohi ʻia ka hopena Raman ma o ka hoʻolālā orientation crystal, e ʻae ana iā x-cut LTOI e hoʻokō i ka hanauna optical optical comb. Hiki i kēia ke hoʻohui monolithic o nā soliton optical frequency combs me nā modulators wikiwiki kiʻekiʻe, kahi hana i hiki ʻole ke hoʻokō ʻia me LNOI.
◆ No ke aha i ʻōlelo ʻole ʻia ai ka Thin-Film Lithium Tantalate (LTOI) ma mua?
ʻOi aku ka haʻahaʻa o ka mahana Curie o ka Lithium tantalate ma mua o ka lithium niobate (610°C vs. 1157°C). Ma mua o ka hoʻomohala ʻana o ka ʻenehana heterointegration (XOI), ua hana ʻia nā modulators lithium niobate me ka hoʻohana ʻana i ka titanium diffusion, kahi e pono ai ka annealing ma luna o 1000°C, e hoʻolilo ana iā LTOI i kūpono ʻole. Eia nō naʻe, me ka neʻe ʻana o kēia lā i ka hoʻohana ʻana i nā substrates insulator a me ka waveguide etching no ka hoʻokumu ʻana o ka modulator, ʻoi aku ka lawa o ka mahana Curie 610°C.
◆ E pani anei ka Thin-Film Lithium Tantalate (LTOI) i ka Thin-Film Lithium Niobate (TFLN)?
Ma muli o ka noiʻi o kēia manawa, hāʻawi ʻo LTOI i nā pono i ka hana passive, ke kūpaʻa, a me ke kumukūʻai hana nui, me ka ʻole o nā drawbacks i ʻike ʻia. Eia nō naʻe, ʻaʻole ʻoi aku ka LTOI ma mua o ka lithium niobate i ka hana modulation, a ʻo nā pilikia kūpaʻa me LNOI he mau hopena i ʻike ʻia. No nā modula DR kamaʻilio, he liʻiliʻi ka noi no nā ʻāpana passive (a hiki ke hoʻohana ʻia ka silicon nitride inā pono). Eia kekahi, pono nā hoʻopukapuka kālā hou e hoʻokumu hou i nā kaʻina hana etching pae wafer, nā ʻenehana heterointegration, a me ka hoʻāʻo hilinaʻi (ʻo ka paʻakikī me ka lithium niobate etching ʻaʻole ka waveguide akā ʻo ka hoʻokō ʻana i ke kūlana wafer-level kiʻekiʻe). No laila, i mea e hoʻokūkū ai me ke kūlana i hoʻokumu ʻia o ka lithium niobate, pono paha ʻo LTOI e wehe i nā pono hou aʻe. Ma ke ʻano hoʻonaʻauao, akā naʻe, hāʻawi ʻo LTOI i ka hiki ke noiʻi koʻikoʻi no nā ʻōnaehana on-chip i hoʻohui ʻia, e like me nā octave-spanning electro-optic combs, PPLT, soliton a me AWG wavelength division devices, a me nā modulators array.
Ka manawa hoʻouna: Nov-08-2024