Dhizaini yemufananidzodunhu rakabatanidzwa
Maseketi akabatanidzwa ePhotonic(PIC) dzinowanzogadzirwa nerubatsiro rwemasvomhu nekuda kwekukosha kwehurefu hwenzira muma interferometers kana mamwe maapplication anonzwisisa hurefu hwenzira.MufananidzoInogadzirwa nekubatanidza ma layer akawanda (anowanzova 10 kusvika 30) pa wafer, ayo anoumbwa nema polygonal shapes akawanda, anowanzo miririrwa muGDSII format. Usati watumira faira kumugadziri we photomask, zvinokurudzirwa zvikuru kukwanisa kutevedzera PIC kuti uone kana dhizaini yacho yakarurama. Simulation yakakamurwa kuita mazinga akasiyana: nhanho yakaderera ndiyo three-dimensional electromagnetic (EM) simulation, uko simulation inoitwa pa sub-wavelength level, kunyange hazvo kudyidzana pakati pemaatomu ari muzvinhu izvi kuchiitwa pa macroscopic scale. Nzira dzakajairika dzinosanganisira three-dimensional finite-difference Time-domain (3D FDTD) uye eigenmode expansion (EME). Nzira idzi ndidzo dzakarurama, asi hadzishandi kwenguva yese yePIC simulation. Danho rinotevera i 2.5-dimensional EM simulation, senge finite-difference beam propagation (FD-BPM). Nzira idzi dzinokurumidza, asi dzinorasikirwa nekururama uye dzinogona kungobata paraxial propagation uye hadzigone kushandiswa kutevedzera resonators, semuenzaniso. Danho rinotevera i2D EM simulation, senge 2D FDTD ne2D BPM. Izvi zvinokurumidzawo, asi zvine mashandiro mashoma, zvekuti hazvigone kutevedzera polarization rotators. Imwe nhanho ndeye transmission uye/kana scattering matrix simulation. Chikamu chimwe nechimwe chikuru chinoderedzwa kuita chikamu chine input uye output, uye waveguide yakabatana inoderedzwa kuita phase shift uye attenuation element. Simulation idzi dzinokurumidza zvikuru. Output signal inowanikwa nekuwanza transmission matrix ne input signal. Spreading matrix (ine zvinhu zvinonzi S-parameters) inowedzera input uye output signals kune rumwe rutivi kuti iwane input uye output signals kune rumwe rutivi rwechikamu. Chaizvoizvo, scattering matrix ine reflection mukati mechinhu. Spreading matrix inowanzo kuve yakakura kaviri pane transmission matrix mune yega yega dimension. Mukupfupisa, kubva ku3D EM kusvika ku transmission/scattering matrix simulation, layer yega yega ye simulation inopa kutengeserana pakati pekumhanya nekururama, uye vagadziri vanosarudza nhanho chaiyo ye simulation kune zvavanoda kuti vagadzirise dhizaini yekusimbisa maitiro.
Zvisinei, kuvimba nekushandisa electromagnetic simulation yezvimwe zvinhu uye kushandisa scattering/transfer matrix kutevedzera PIC yese hakuvimbisi dhizaini chaiyo pamberi pe flow plate. Semuenzaniso, kureba kwenzira kusina kuverengerwa zvakanaka, multimode waveguides dzinokundikana kudzvinyirira zvinobudirira high-order modes, kana waveguides mbiri dziri pedyo zvakanyanya zvichikonzera matambudziko asingatarisirwi ekubatanidza zvinogona kusaonekwa panguva ye simulation. Naizvozvo, kunyangwe zvishandiso zve simulation zvepamusoro zvichipa simba rekusimbisa dhizaini, zvichiri kuda kungwarira kwakanyanya uye kuongororwa kwakanyatsoitwa nemugadziri, pamwe neruzivo rwekuita uye ruzivo rwehunyanzvi, kuti ive nechokwadi chekuti dhizaini yacho yakarurama uye yakavimbika uye kuderedza njodzi ye flow sheet.
Imwe nzira inonzi sparse FDTD inobvumira kuti 3D ne2D FDTD simulations zviitwe zvakananga paPIC design yakazara kuti isimbise dhizaini. Kunyangwe zvichinetsa kuti chero chishandiso che electromagnetic simulation chiite PIC yakakura kwazvo, sparse FDTD inokwanisa kutevedzera nzvimbo yakakura yemuno. Mu3D FDTD yechinyakare, simulation inotanga nekutanga zvikamu zvitanhatu zve electromagnetic field mukati mehuwandu hwakatarwa. Sezvo nguva ichifamba, chikamu chitsva chemunda muhuwandu chinoverengerwa, nezvimwewo. Danho rega rega rinoda kuverenga kwakawanda, saka zvinotora nguva yakareba. Mu3D FDTD isina kukwana, pachinzvimbo chekuverenga padanho rega rega panzvimbo yega yega yehuwandu, runyorwa rwezvikamu zvemunda runochengetwa runogona kuenderana nehukuru hwakakura uye kuverengerwa chete kune izvo zvikamu. Padanho rega rega renguva, mapoinzi ari pedyo nezvikamu zvemunda anowedzerwa, nepo zvikamu zvemunda zviri pasi pemuganho wesimba rakati zvinodonhedzwa. Kune mamwe maumbirwo, kuverenga uku kunogona kuva nemirairo yakati wandei yehukuru nekukurumidza kupfuura 3D FDTD yechinyakare yechinyakare. Zvisinei, FDTDS shoma haishande zvakanaka pakubata nemagadzirirwo akapararira nekuti panguva ino nzvimbo inopararira zvakanyanya, zvichikonzera runyorwa rwakareba uye rwakaoma kubata. Mufananidzo 1 unoratidza muenzaniso wemufananidzo we3D FDTD simulation yakafanana ne polarization beam splitter (PBS).
Mufananidzo 1: Kutevedzera kunobuda mu3D sparse FDTD. (A) ipfungwa yepamusoro yechimiro chiri kutevedzera, icho chiri chinobatanidza zvakananga. (B) Inoratidza mufananidzo wemufananidzo uchishandisa quasi-TE excitation. Madhayagiramu maviri ari pamusoro anoratidza maonero epamusoro ezviratidzo zvequasi-TE nequasi-TM, uye madhayagiramu maviri ari pazasi anoratidza maonero anoenderana. (C) Inoratidza mufananidzo wemufananidzo uchishandisa quasi-TM excitation.
Nguva yekutumira: Chikunguru-23-2024