Teitei o te rārangikaiwhakarerekē hiko-whatume te tono photon ngaruiti
I te pikinga ake o ngā whakaritenga mō ngā pūnaha whakawhitiwhiti kōrero, kia pai ake ai te whai huatanga o te tuku tohu, ka whakakotahi te tangata i ngā photon me ngā irahiko hei whakatutuki i ngā painga ōrite, ā, ka whānau mai ngā hangarau photonics ngaruiti. E hiahiatia ana te modulator electro-optical hei huri i te hiko ki te mārama i roto i tengā pūnaha whakaahua ngaruiti, ā, ko tēnei taahiraa matua te tikanga e whakatau ana i te mahi a te pūnaha katoa. Nā te mea he tukanga tohu anaro te hurihanga o te tohu auau reo irirangi ki te rohe whatu, ā, he mea noangā whakarerekētanga hiko-whatuHe kore-raina ā-roto, he nui te whakapōturitanga o te tohu i roto i te tukanga tahuritanga. Hei whakatutuki i te whakarerekētanga raina tata, ko te pūwāhi mahi o te modulator ka whakaritea i te pūwāhi whakahāngai orthogonal, engari kāore tonu e taea te whakatutuki i ngā whakaritenga o te hononga photon microwave mō te raina o te modulator. Me tere te hiahia ki ngā modulators hiko-whatu me te raina teitei.
Ko te whakarerekētanga taupū whakaata tere-teitei o ngā rauemi silicon ka tutukihia mā te pānga horapa plasma kawe kore utu (FCD). He kore-raina te pānga FCD me te whakarerekētanga hononga PN, ā, he iti ake te raina o te whakarerekētanga silicon i te whakarerekētanga lithium niobate. He tino pai te whakaaturanga a ngā rauemi lithium niobate.whakarerekētanga hiko-whatungā āhuatanga nā te pānga Pucker. I taua wā anō, he nui te whānui o te hononga o te rauemi lithium niobate, he pai ngā āhuatanga whakarerekētanga, he iti te ngaronga, he ngāwari te whakauru me te hototahi ki te tukanga semiconductor, ko te whakamahinga o te lithium niobate kiriata angiangi hei hanga i te modulator electro-optical mahi-teitei, ki te whakaritea ki te silicon tata kore he "pereti poto", engari ka taea hoki te whakatutuki i te raina teitei. Ko te modulator electro-whatu lithium niobate kiriata angiangi (LNOI) i runga i te insulator kua waiho hei huarahi whanaketanga whai hua. I te whanaketanga o te hangarau whakarite rauemi lithium niobate kiriata angiangi me te hangarau whakairo ngaru, ko te pai o te hurihanga me te whakaurunga teitei ake o te modulator electro-whatu lithium niobate kiriata angiangi kua noho hei mara o te ao matauranga me te ahumahi o te ao.
Ngā āhuatanga o te niobate lithium kiriata angiangi
I te Hononga o Amerika, kua arotakehia e te DAP AR te rauemi lithium niobate e whai ake nei: mēnā ka tapaina te pokapū o te hurihanga hiko i muri i te rauemi silicon e taea ai, ko te wāhi whānau o te hurihanga photonics ka tapaina pea i muri i te lithium niobate. Nā te mea ka whakauruhia e te lithium niobate te pānga hiko-whatu, te pānga acousto-whatu, te pānga piezoelectric, te pānga thermoelectric me te pānga photorefractive ki roto i te kotahi, pērā i ngā rauemi silicon i roto i te mara o ngā whatu.
Mō ngā āhuatanga tuku whatu, ko te rauemi InP te mea nui rawa atu te ngaronga tuku i runga i te maramara nā te mimiti o te mārama i roto i te roopu 1550nm e whakamahia whānuitia ana. Ko te SiO2 me te silicon nitride ngā āhuatanga tuku pai rawa atu, ā, ka taea e te ngaronga te eke ki te taumata o te ~ 0.01dB/cm; I tēnei wā, ko te ngaronga arataki ngaru o te arataki ngaru lithium niobate kiriata angiangi ka taea te eke ki te taumata o te 0.03dB/cm, ā, ko te ngaronga o te arataki ngaru lithium niobate kiriata angiangi ka taea te whakaiti ake me te whakapai tonu i te taumata hangarau a meake nei. Nō reira, ka whakaatu te rauemi lithium niobate kiriata angiangi i te mahi pai mō ngā hanganga mārama kore mahi pērā i te ara photosynthesis, shunt me te microring.
Mō te whakaputa māramatanga, ko te InP anake te kaha ki te tuku tika i te māramatanga; Nō reira, mō te whakamahinga o ngā irahiko ngaruiti, me whakauru te pūtake māramatanga e hangai ana ki te InP ki runga i te maramara whakauru irahiko e hangai ana ki te LNOI mā te whakarewa utaina, te tipu epitaxial rānei. Mō te whakarerekētanga māramatanga, kua whakanuia i runga ake nei he māmā ake te whakatutuki i te whānui o te whakarerekētanga, te ngaohiko haurua-ngaru iti iho, me te ngaronga tuku iti iho i te InP me te Si. Heoi anō, he mea nui te rārangi teitei o te whakarerekētanga hiko-whatu o ngā rauemi irahiko angiangi lithium mō ngā whakamahinga irahiko ngaruiti katoa.
Mō te ara whatu, nā te tere tere o te urupare hiko-whatu o te rauemi lithium niobate angiangi ka taea e te pana whatu e hangai ana ki te LNOI te whakawhiti ara whatu tere-teitei, ā, he tino iti hoki te kaha e pau ana i taua whakawhiti tere-teitei. Mō te whakamahinga noa o te hangarau photon ngaruiti whakauru, ka taea e te maramara hanga hihi e whakahaeretia ana e te whatu te whakawhiti tere-teitei ki te whakatutuki i ngā hiahia o te matawai hihi tere, ā, ko ngā āhuatanga o te whakamahinga hiko tino iti kua pai te urutau ki ngā whakaritenga tino pakari o te pūnaha huinga ā-wāhanga nui. Ahakoa ka taea hoki e te pana whatu e hangai ana ki te InP te whakatutuki i te whakawhiti ara whatu tere-teitei, ka nui te haruru ka puta mai, inā koa ka whakarōpūhia te pana whatu maha-taumata, ka tino heke te tauwehenga haruru. Ka taea anake e ngā rauemi silicon, SiO2 me te silicon nitride te whakawhiti ara whatu mā te pānga thermo-whatu, te pānga marara kawe rānei, he ngoikoretanga o te whakamahinga hiko teitei me te tere whakawhiti puhoi. Ina nui te rahi o te huinga ā-wāhanga, kāore e taea te whakatutuki i ngā whakaritenga o te whakamahinga hiko.
Mō te whakanui whatu, ko tewhakakaha whatu haurua-haurua (SOA) i runga i te InP kua pakari mō te whakamahinga arumoni, engari he ngoikoretanga ōna, arā, he nui te tauwehenga haruru me te iti o te mana whakaputa mātotoru, kāore e pai mō te tono o ngā photon ngaruiti. Mā te tukanga whakanui tawhā o te arataki ngaru lithium niobate kiriata-angiangi i runga i te whakahohenga me te hurihanga ā-wā, ka taea te whakatutuki i te haruru iti me te whakanui whatu i runga i te maramara, ka taea te whakatutuki i ngā whakaritenga o te hangarau photon ngaruiti whakauru mō te whakanui whatu i runga i te maramara.
Mō te kimi mārama, he pai ngā āhuatanga tuku o te niobate lithium kiriata angiangi ki te mārama i roto i te whānuitanga 1550 nm. Kāore e taea te whakatutuki i te mahi o te hurihanga hiko whakaahua, nō reira, mō ngā tono photon ngaruiti, kia tutuki ai ngā hiahia o te hurihanga hiko whakaahua i runga i te maramara. Me whakauru ngā waeine kimi InGaAs, Ge-Si rānei ki runga i ngā maramara whakauru photonic e hangai ana ki te LNOI mā te whakarewa utaina, te tipu epitaxial rānei. Mō te hononga ki te muka whatu, nā te mea he rauemi SiO2 te muka whatu, ko te mara aratau o te arataki ngaru SiO2 te mea tino ōrite ki te mara aratau o te muka whatu, ā, ko te hononga te mea tino watea. Ko te diameter mara aratau o te arataki ngaru tino herea o te niobate lithium kiriata angiangi he tata ki te 1μm, he tino rerekē i te mara aratau o te muka whatu, nō reira me whakahaere te hurihanga ira aratau tika kia ōrite ki te mara aratau o te muka whatu.
Mō te whakaurunga, ko te kaha o te whakaurunga o ngā rauemi rerekē ka whakawhirinaki ki te pūtoro piko o te arataki ngaru (e pāngia ana e te herenga o te mara aratau arataki ngaru). Mā te arataki ngaru tino herea ka taea te pūtoro piko iti ake, he pai ake mō te whakatutukitanga o te whakaurunga teitei. Nō reira, he kaha tō ngā arataki ngaru lithium niobate kiriata-angiangi ki te whakatutuki i te whakaurunga teitei. Nō reira, mā te putanga mai o te lithium niobate kiriata-angiangi ka taea e te rauemi lithium niobate te mahi hei "silicon" whatu. Mō te whakamahinga o ngā photon ngaruiti, he mārama ake ngā painga o te lithium niobate kiriata-angiangi.
Wā tuku: 23 Paenga-whāwhā 2024