Dhizaini yephotonicIntegrated circuit
Photonic integrated circuits(PIC) inowanzogadzirwa nerubatsiro rwezvinyorwa zvemasvomhu nekuda kwekukosha kwekureba kwenzira mu interferometers kana mamwe maapplication ane hanya nehurefu hwegwara.PICinogadzirwa nekupuruzira akati wandei akaturikidzana (kazhinji gumi kusvika 30) pawafer, ayo anoumbwa neakawanda mapolygonal maumbirwo, anowanzo miririrwa muGDSII fomati. Usati watumira faira kumugadziri wephotomask, zvinoshuviwa zvakanyanya kukwanisa kutevedzera PIC kuti uone kurongeka kwedhizaini. Iyo simulation yakakamurwa kuita akawanda mazinga: iyo yakaderera nhanho ndeye matatu-dimensional electromagnetic (EM) simulation, uko simulation inoitwa padanho re-sub-wavelength, kunyangwe kudyidzana pakati peatomu mune izvo zvinhu kunoitwa pachiyero che macroscopic. Nzira dzakajairwa dzinosanganisira nhatu-dimensional finite-difference Nguva-domain (3D FDTD) uye eigenmode kuwedzera (EME). Idzi nzira ndidzo dzakanyanya, asi hadzishandi kune yese PIC simulation nguva. Iyo inotevera nhanho ndeye 2.5-dimensional EM simulation, senge finite-difference beam propagation (FD-BPM). Idzi nzira dzinokurumidza kukurumidza, asi dzinopira kumwe kurongeka uye dzinogona kubata paraxial kuparadzira uye haigone kushandiswa kutevedzera resonators, semuenzaniso. Iyo inotevera nhanho ndeye 2D EM simulation, senge 2D FDTD uye 2D BPM. Izvi zvakare zvinokurumidza, asi zvine mashandiro mashoma, senge asingakwanise kutevedzera polarization rotator. Imwe nhanho ndeyekutapurirana uye/kana kuparadzira matrix simulation. Chimwe nechimwe chikamu chikuru chinoderedzwa kuita chikamu chine chinopinza uye chinobuda, uye iyo yakabatana waveguide inoderedzwa kuita chikamu chekuchinja uye attenuation chinhu. Iyi mifanidzo inokurumidza zvakanyanya. Chiratidzo chekubuda chinowanikwa nekuwanza matrix ekutumira nechiratidzo chekupinza. Iyo yekuparadzira matrix (iyo zvinhu zvayo zvinodaidzwa kuti S-parameters) inowanza masaini ekuisa uye ekubuda kune rimwe divi kuti uwane yekupinza uye inobuda masaini kune rimwe divi rechikamu. Chaizvoizvo, iyo yekuparadzira matrix ine ratidziro mukati mechinhu. Iyo yekuparadzira matrix inowanzokura zvakapetwa kaviri seyekutumira matrix mune imwe neimwe dimension. Muchidimbu, kubva ku3D EM kuenda kune kutapurirana/kuparadzira matrix simulation, imwe neimwe nhanho yekufananidza inopa kutengeserana pakati pekumhanya uye kurongeka, uye vagadziri vanosarudza nhanho chaiyo yekufananidza kune yavo chaiyo yavanoda kuti vakwanise dhizaini yekusimbisa maitiro.
Nekudaro, kuvimba nemagetsi simulation yezvimwe zvinhu uye kushandisa kuparadzira / kutamisa matrix kutevedzera iyo PIC yese haivimbisi dhizaini yakakwana pamberi peplate yekuyerera. Semuenzaniso, kureba kwenzira dzisina kurongeka, multimode waveguides inotadza kudzvanya nzira dzepamusoro-soro, kana maviri mafungu ari padhuze padhuze neanotungamira kumatambudziko ekubatanidza asingatarisirwe anogona kuenda asingaonekwe panguva yekufananidza. Naizvozvo, kunyangwe maturusi epamberi ekuenzanisa achipa masimba ane simba ekusimbisa dhizaini, ichiri kuda yakakwira dhigirii yekusvinurira uye kunyatsotariswa nemugadziri, akasanganiswa neruzivo runoshanda uye ruzivo rwehunyanzvi, kuve nechokwadi chechokwadi uye kuvimbika kwedhizaini uye kuderedza njodzi flow sheet.
Nzira inonzi sparse FDTD inobvumira 3D uye 2D FDTD simulations kuti iitwe zvakananga pane yakazara PIC dhizaini yekusimbisa dhizaini. Kunyangwe zvichinetsa kune chero electromagnetic simulation chishandiso kutevedzera yakakura kwazvo PIC, iyo shoma FDTD inokwanisa kutevedzera yakakura nzvimbo yenzvimbo. Muchinyakare 3D FDTD, simulation inotanga nekutanga zvikamu zvitanhatu zvemunda wemagetsi mukati meiyo vhoriyamu yakatarwa. Sezvo nguva ichifambira mberi, chikamu chitsva chemunda muhuwandu chinoverengwa, zvichingodaro. Nhanho imwe neimwe inoda kuverenga kwakawanda, saka inotora nguva yakareba. Muchidimbu 3D FDTD, pachinzvimbo chekuverenga pachinhanho chimwe nechimwe chevhoriyamu, rondedzero yezvikamu zvemunda inochengetwa iyo inogona kuenderana nevhoriyamu hombe uye kuverengerwa chete kune izvo zvikamu. Panguva imwe neimwe nhanho, mapoinzi ari padhuze nezvikamu zvemunda anowedzerwa, nepo zvikamu zvemunda zviri pazasi pechimwe chikumbaridzo chesimba zvinodonhedzwa. Kune zvimwe zvimiro, iyi computation inogona kuve akati wandei maodha ehukuru nekukurumidza kupfuura yechinyakare 3D FDTD. Nekudaro, shoma FDTDS haiite zvakanaka kana ichibata neanoparadzira zvimiro nekuti ino nguva ndima inopararira yakawandisa, zvichikonzera mazita akareba uye akaoma kubata. Mufananidzo 1 unoratidza muenzaniso skrini ye 3D FDTD simulation yakafanana neye polarization beam splitter (PBS).
Mufananidzo 1: Simulation mhedzisiro kubva ku3D sparse FDTD. (A) itariso yepamusoro yechimiro chiri kutevedzerwa, chinova chinotungamira coupler. (B) Inoratidza mufananidzo wekufananidza uchishandisa quasi-TE excitation. Iyo miviri miviri iri pamusoro inoratidza maonero epamusoro e-quasi-TE uye quasi-TM zviratidzo, uye madhayagiramu maviri ari pasi apa anoratidza maonero anowirirana. (C) Inoratidza mufananidzo wekufananidza uchishandisa quasi-TM kunakidzwa.
Nguva yekutumira: Jul-23-2024