Te hoahoa owhakaahuaara iahiko whakauru
Ngā ara iahiko whakauru photonic(PIC) e hangaia ana mā te āwhina o ngā tuhinga pāngarau nā te mea he mea nui te roa o te ara i roto i ngā interferometer, i ētahi atu tono rānei e pā ana ki te roa o te ara.PICka hangaia mā te tātai i ngā paparanga maha (te tikanga 10 ki te 30) ki runga i tētahi paparanga, he maha ngā āhua porowhita, e whakaatuhia ana i roto i te whakatakotoranga GDSII. I mua i te tukunga o te kōnae ki te kaihanga whakaahua kanohi, he mea tino hiahiatia kia taea te whakatauira i te PIC hei manatoko i te tika o te hoahoa. Kua wehea te whakatauira ki ngā taumata maha: ko te taumata iti rawa ko te whakatauira hikohiko-toru-ahu (EM), kei reira te whakatauira e mahia ana i te taumata roa-ngaru iti, ahakoa ko ngā taunekeneke i waenga i ngā ngota i roto i te rauemi ka whakahaerehia i te tauine makaro. Ko ngā tikanga noa ko te rohe-wā rerekētanga-mutunga-toru-ahu (3D FDTD) me te whakawhānui aratau eigen (EME). Ko ēnei tikanga te mea tino tika, engari kāore e whai hua mō te wā whakatauira PIC katoa. Ko te taumata e whai ake nei ko te whakatauira EM 2.5-ahu, pērā i te horapa hihi rerekētanga-mutunga (FD-BPM). He tere ake ēnei tikanga, engari ka whakararu i ētahi tika, ā, ka taea anake te whakahaere i te horapa paraxial, ā, kāore e taea te whakamahi hei whakatauira i ngā resonators, hei tauira. Ko te taumata e whai ake nei ko te whakatauira EM 2D, pērā i te 2D FDTD me te 2D BPM. He tere ake hoki ēnei, engari he iti noa iho ngā mahi, pērā i te kore e taea te whakatauira i ngā takahuri pōrari. Ko tētahi atu taumata ko te whakatauira matihiko tuku me/ranei te whakatauira matihiko marara. Ka whakaitihia ia wāhanga matua ki tētahi wāhanga me te tāuru me te putanga, ā, ka whakaitihia te arataki ngaru hono ki tētahi huānga nekehanga ā-wāhanga me te whakaiti. He tino tere ēnei whakatauira. Ka whiwhihia te tohu putanga mā te whakarea i te matihiko tuku ki te tohu tāuru. Ka whakareatia e te matihiko marara (ko ōna huānga e kiia nei ko ngā tawhā-S) ngā tohu tāuru me te putanga i tētahi taha hei kimi i ngā tohu tāuru me te putanga i tētahi taha o te wāhanga. Ko te tikanga, kei roto i te matihiko marara te whakaata i roto i te huānga. Ko te tikanga he rua te rahi o te matihiko marara i te matihiko tuku i ia taha. Hei whakarāpopototanga, mai i te EM 3D ki te whakatauira matihiko tuku/marara, ka whakaatuhia e ia paparanga o te whakatauira he tauwhitinga i waenga i te tere me te tika, ā, ka whiriwhiria e ngā kaihoahoa te taumata whakatauira tika mō ā rātou hiahia motuhake hei arotau i te tukanga whakamana hoahoa.
Heoi, ko te whakawhirinaki ki te whakaata hikohiko o ētahi huānga me te whakamahi i te matihiko marara/whakawhiti hei whakaata i te PIC katoa, kāore e tino tika te hoahoa i mua i te pereti rere. Hei tauira, ko ngā roa ara kua he te tatau, ko ngā ara ārahi maha-aratau e kore e kaha ki te pehi i ngā aratau teitei, ko ngā ara ārahi e rua rānei e tata rawa ana tetahi ki tetahi, e arahi ana ki ngā raruraru hononga ohorere, tera pea kāore e kitea i te wā whakaata. Nō reira, ahakoa he kaha ngā āheinga whakamana hoahoa a ngā taputapu whakaata matatau, me nui tonu te mataara me te tirotiro tupato a te kaihoahoa, me te wheako mahi me te mōhiotanga hangarau, kia tika ai te hoahoa me te whakaiti i te mōrearea o te pepa rere.
Mā te tikanga e kiia nei ko te sparse FDTD ka taea te whakahaere tika i ngā whakatauira FDTD 3D me te 2D ki runga i tētahi hoahoa PIC katoa hei whakamana i te hoahoa. Ahakoa he uaua ki tētahi taputapu whakatauira hikohiko te whakatauira i tētahi PIC tauine nui rawa atu, ka taea e te sparse FDTD te whakatauira i tētahi rohe ā-rohe nui rawa atu. I roto i te FDTD 3D tuku iho, ka tīmata te whakatauira mā te tīmatanga i ngā wāhanga e ono o te mara hikohiko i roto i tētahi rōrahi kua tohua. I te haere tonu o te wā, ka tatauhia te wāhanga mara hou i roto i te rōrahi, me ērā atu. He nui te tatau i ia taahiraa, nō reira he roa te wā. I roto i te sparse 3D FDTD, hei utu mō te tatau i ia taahiraa i ia pūwāhi o te rōrahi, ka puritia he rārangi o ngā wāhanga mara ka taea te rite ki tētahi rōrahi nui noa iho, ā, ka tatauhia mō aua wāhanga anake. I ia taahiraa wā, ka tāpirihia ngā pūwāhi e tata ana ki ngā wāhanga mara, i te wā ka tukuna ngā wāhanga mara i raro i tētahi paepae mana. Mō ētahi hanganga, ka taea e tēnei tatau te tere ake i ētahi ota o te nui atu i te FDTD 3D tuku iho. Heoi, kāore e pai te mahi a ngā FDTDS taratahi ina mahi ana ki ngā hanganga marara nā te mea he nui rawa te horapa o tēnei āpure wā, ka hua ake he rārangi roa rawa, he uaua hoki ki te whakahaere. E whakaatu ana te Pikitia 1 i tētahi tauira hopu mata o tētahi whaihanga FDTD 3D e rite ana ki tētahi wehewehe hihi polarization (PBS).
Pikitia 1: Ngā hua whakatauira mai i te FDTD 3D sparse. Ko (A) he tirohanga tihi o te hanganga e whakatauirahia ana, he hononga aronga. (B) E whakaatu ana i te whakaahua mata o te whakatauira e whakamahi ana i te whakaoho quasi-TE. E whakaatu ana ngā hoahoa e rua i runga ake nei i te tirohanga tihi o ngā tohu quasi-TE me quasi-TM, ā, e whakaatu ana ngā hoahoa e rua i raro nei i te tirohanga whakawhiti-wāhanga e rite ana. (C) E whakaatu ana i te whakaahua mata o te whakatauira e whakamahi ana i te whakaoho quasi-TM.
Wā tuku: Hurae-23-2024