Ngā Painga me te Hiranga o te Niobate Ritenga Angiangi o te Lithium i roto i te Hangarau Photon Ngaruiti Whakauru
Hangarau photon ngaruitiHe painga tōna, arā, he whānui te whānui o te mahi, he kaha te tukatuka whakarara, ā, he iti te ngaronga tuku, ka taea ai te wawahi i te arai hangarau o te pūnaha ngaruiti tuku iho, me te whakapai ake i te mahi a ngā taputapu mōhiohio hiko hōia pērā i te radar, te pakanga hiko, te whakawhitiwhiti kōrero me te ine me te whakahaere. Heoi, he raruraru kei te pūnaha photon ngaruiti e hangai ana ki ngā taputapu motuhake, pērā i te nui o te rōrahi, te taumaha me te kore pumau, e tino aukati ana i te tono o te hangarau photon ngaruiti i roto i ngā papaaho rererangi me te mokowā. Nō reira, kei te noho te hangarau photon ngaruiti whakauru hei tautoko nui ki te wawahi i te tono o te photon ngaruiti i roto i te pūnaha mōhiohio hiko hōia, me te whakamahi katoa i ngā painga o te hangarau photon ngaruiti.
I tēnei wā, kua pakari haere te hangarau whakauru photonic e hangai ana ki te SI me te hangarau whakauru photonic e hangai ana ki te INP i muri i ngā tau maha o te whanaketanga i roto i te ao whakawhitiwhiti whatu, ā, he maha ngā hua kua tukuna ki te mākete. Heoi, mō te whakamahinga o te photon ngaruiti, he raruraru kei roto i ēnei momo hangarau whakauru photon e rua: hei tauira, ko te tauwehenga hiko-whatu kore-raina o te modulator Si me te modulator InP he rerekē ki te raina teitei me ngā āhuatanga hihiri nui e whaihia ana e te hangarau photon ngaruiti; Hei tauira, ko te pana whatu silicon e whakatutuki ana i te whakawhiti ara whatu, ahakoa i runga i te pānga wera-whatu, te pānga piezoelectric, te pānga marara werohanga kawe rānei, he raruraru o te tere whakawhiti puhoi, te whakapaunga hiko me te whakapaunga wera, e kore e taea te whakatutuki i te matawai hihi tere me te tono photon ngaruiti tauine nui.
Ko te lithium niobate te whiringa tuatahi mō te tere tere.whakarerekētanga hiko-whatungā rauemi nā tōna pānga hiko-whatu tino pai. Heoi, ko te niobate lithium tuku ihokaiwhakarerekē hiko-whatuHe mea hanga ki te rauemi tioata lithium niobate nui, ā, he tino rahi te rahi o te taputapu, kāore e taea te whakatutuki i ngā hiahia o te hangarau photon ngaruiti whakauru. Ko te huarahi ki te whakauru i ngā rauemi lithium niobate me te tauwehenga hiko-whatu raina ki roto i te pūnaha hangarau photon ngaruiti whakauru kua noho hei whāinga mā ngā kairangahau e tika ana. I te tau 2018, i te tuatahi i ripoatahia e te rōpū rangahau mai i Te Whare Wānanga o Harvard i te United States te hangarau whakauru photonic i runga i te lithium niobate kiriata angiangi i roto i te Nature, nā te mea he painga te hangarau o te whakauru teitei, te whānui o te whakarerekētanga hiko-whatu nui, me te raina teitei o te pānga hiko-whatu, i te whakarewatanga, ka aro tonu te ao mātauranga me te ahumahi ki te mara o te whakauru photonic me te photonics ngaruiti. Mai i te tirohanga o te tono photon ngaruiti, ka arotakehia e tēnei pepa te awe me te hiranga o te hangarau whakauru photon i runga i te lithium niobate kiriata angiangi ki te whanaketanga o te hangarau photon ngaruiti.
Rauemi angiangi lithium niobate me te kiriata angiangite kaiwhakatikatika lithium niobate
I ngā tau e rua tata nei, kua puta mai tētahi momo rauemi lithium niobate hou, arā, ka tangohia te kiriata lithium niobate mai i te tioata lithium niobate nui mā te tikanga "poro ion" ka herea ki te wafer Si me te paparanga ārai silica hei hanga rauemi LNOI (LiNbO3-On-Insulator) [5], e kiia nei ko te rauemi lithium niobate kiriata angiangi i roto i tēnei pepa. Ka taea te whakairo i ngā arataki ngaru o te tihi neke atu i te 100 nanometer ki runga i ngā rauemi lithium niobate kiriata angiangi mā te tukanga whakairo maroke kua arotauhia, ā, ko te rerekētanga taupū whakaata whai hua o ngā arataki ngaru i hangaia ka eke ki te neke atu i te 0.8 (he teitei ake i te rerekētanga taupū whakaata o ngā arataki ngaru lithium niobate tuku iho o te 0.02), e whakaaturia ana i te Pikitia 1. Mā te arataki ngaru tino herea ka māmā ake te whakataurite i te mara mārama me te mara ngaruiti i te wā e hoahoa ana i te modulator. Nō reira, he pai ki te whakatutuki i te ngaohiko haurua-ngaru iti ake me te whānui o te whakawhitiwhiti i roto i te roa poto ake.
Mā te putanga mai o te arataki ngaru iti-ngaro lithium niobate ka pakaru te arai o te ngaohiko taraiwa teitei o te modulator hiko-whatu lithium niobate tuku iho. Ka taea te whakaiti i te mokowā irahiko ki te ~ 5 μm, ā, ka nui ake te taupatupatu i waenga i te mara hiko me te mara aratau whatu, ā, ka heke te vπ ·L mai i te neke atu i te 20 V·cm ki raro iho i te 2.8 V·cm. Nō reira, i raro i te ngaohiko haurua-ngaru kotahi, ka taea te whakaiti nui i te roa o te taputapu ki te whakataurite ki te modulator tuku iho. I taua wā anō, i muri i te arotau i ngā tawhā o te whānui, te matotoru me te tawhiti o te irahiko ngaru haere, e whakaaturia ana i te pikitia, ka taea e te modulator te whai i te kaha o te whānuitanga whakawhiti tino teitei neke atu i te 100 GHz.
Pikitia 1 (a) te tohatoha aratau kua tatauhia me te (b) ahua o te wāhanga whakawhiti o te arataki ngaru LN
Pikitia 2 (a) Te hanganga arataki ngaru me te hiko me te (b) pereti matua o te whakarerekētanga LN
Ko te whakatairite i ngā whakarerekētanga kiriata angiangi lithium niobate me ngā whakarerekētanga arumoni lithium niobate tuku iho, ngā whakarerekētanga e hangai ana ki te silicon me ngā whakarerekētanga indium phosphide (InP) me ētahi atu whakarerekētanga hiko-whatu tere-tiketike o nāianei, ko ngā tawhā matua o te whakatairite ko:
(1) Te hua o te roa-ngaohiko haurua-ngaru (vπ ·L, V·cm), mā te ine i te whai huatanga o te whakarerekētanga, ko te iti o te uara, ko te teitei ake o te whai huatanga o te whakarerekētanga;
(2) 3 dB te whānui o te whakarerekētanga (GHz), e ine ana i te urupare a te whakarerekētanga ki te whakarerekētanga auau-tiketike;
(3) Te ngaronga whakaurunga whatu (dB) i te rohe whakarerekētanga. Ka kitea mai i te ripanga he mārama ngā painga o te whakarerekētanga lithium niobate kiriata angiangi i roto i te whānui o te whakarerekētanga, te ngaohiko haurua-ngaru, te ngaronga whakawhitinga whatu me ētahi atu.
Ko te silicon, hei tūāpapa mō te optoelectronics whakauru, kua whanakehia tae noa mai ki tēnei wā, kua pakari te tukanga, ā, he pai te whakaiti i te rahi o ngā taputapu hohe/kore, ā, kua whānuitia, kua hohonu hoki te rangahau i tōna modulator i roto i te ao whakawhitiwhiti whatu. Ko te tikanga whakarerekētanga hiko-whatu o te silicon ko te whakaiti i te kawe, te werohanga kawe me te kohikohi kawe. I roto i ēnei, ko te whānui o te modulator he pai rawa atu me te tikanga whakaiti i te nekehanga kawe raina, engari nā te mea ka taupatupatu te tohatoha mara whatu ki te kore-ōrite o te rohe whakaiti, ka puta mai i tēnei pānga he whakapōturi tuarua-raupapa kore-raina me te whakapōturi whakawhitiwhiti tuatoru-raupapa, me te pānga mimiti o te kawe ki te mārama, ka arahi ki te whakaiti i te kaha whakarerekētanga whatu me te whakapōturi tohu.
He tino pai ngā pānga hiko-whatu o te pūwhakatikatika InP, ā, ka taea e te hanganga puna matū maha-paparanga te whakatutuki i ngā pūwhakatikatika tere tino teitei me te ngaohiko taraiwa iti me te Vπ·L tae atu ki te 0.156V · mm. Heoi, ko te rerekētanga o te taupū whakaata me te mara hiko kei roto ko ngā kupu raina me ngā kupu kore-raina, ā, ko te pikinga o te kaha o te mara hiko ka whakaatu i te pānga tuarua. Nō reira, me whakamahi te hianga o ngā pūwhakatikatika hiko-whatu silicon me InP hei hanga hononga pn ina mahi ana, ā, ka kawea mai e te hononga pn te ngaronga mimiti ki te mārama. Heoi, he iti te rahi o te pūwhakatikatika o ēnei e rua, ko te rahi o te pūwhakatikatika InP arumoni he 1/4 o te pūwhakatikatika LN. He pai te whai huatanga o te pūwhakatikatika, he pai mō ngā whatunga tuku whatu mamati kiato teitei me te tawhiti poto pēnei i ngā pokapū raraunga. Ko te pānga hiko-whatu o te lithium niobate kāore he tikanga mimiti mārama me te iti o te ngaronga, he pai mō te hononga tawhiti roa.whakawhitiwhiti kōrero whatuhe nui te kaha me te tere teitei. I roto i te tono photon ngaruiti, he kore-raina ngā tauwehenga hiko-whatu o Si me InP, kāore e tika ana mō te pūnaha photon ngaruiti e whai ana i te raina teitei me te hihiri nui. He tino pai te rauemi lithium niobate mō te tono photon ngaruiti nā te mea he raina katoa te tauwehenga whakarerekētanga hiko-whatu.
Wā tuku: Paenga-whāwhā-22-2024