Uhlobo olusha lwe-terahertz multiplexer luphinde kabili umthamo wedatha futhi lwathuthukisa kakhulu ukuxhumana kwe-6G nge-bandwidth engakaze ibonwe kanye nokulahleka kwedatha okuphansi.
Abacwaningi bethule i-multiplexer ye-band ebanzi kakhulu ephinda kabili umthamo wedatha futhi ilethe intuthuko entsha ku-6G nangale kwayo. (Umthombo wesithombe: Getty Images)
Ukuxhumana okungenantambo kwesizukulwane esilandelayo, okumelelwa ubuchwepheshe be-terahertz, kuthembisa ukuguqula ukudluliswa kwedatha.
Lezi zinhlelo zisebenza kumaza e-terahertz, zinikeza i-bandwidth engenakuqhathaniswa yokudlulisa idatha okusheshayo kakhulu kanye nokuxhumana. Kodwa-ke, ukuze kufezwe ngokugcwele leli thuba, izinselele ezinkulu zobuchwepheshe kumele zinqotshwe, ikakhulukazi ekuphatheni nasekusebenziseni ngempumelelo i-spectrum etholakalayo.
Intuthuko entsha ibhekane nale nselele: i-ultra-wideband integrated terahertz polarization (de)multiplexer yokuqala eqanjwe nge-ultra-wideband etholakala epulatifomu ye-silicon engenazo izisekelo.
Lo mklamo omusha uhlose ibhendi ye-sub-terahertz J (220-330 GHz) futhi uhlose ukuguqula ukuxhumana kwe-6G nangale kwalokho. Idivayisi iphinda kabili umthamo wedatha ngempumelelo ngenkathi igcina izinga lokulahleka kwedatha eliphansi, ivula indlela yamanethiwekhi angenantambo asheshayo asebenza kahle futhi athembekile.
Ithimba elilandela lesi sinyathelo lihlanganisa uSolwazi Withawat Withayachumnankul waseSikoleni Sobunjiniyela Bogesi Nobuchwepheshe Bemishini sase-University of Adelaide, uDkt. Weijie Gao, manje ongumcwaningi we-postdoctoral e-Osaka University, kanye noSolwazi Masayuki Fujita.
USolwazi Withayachumnankul uthe, "I-polarization multiplexer ehlongozwayo ivumela ukusakazwa kwedatha eminingi ukuthi kudluliselwe ngasikhathi sinye ngaphakathi kwebhendi efanayo yemvamisa, okuphinda kabili umthamo wedatha ngempumelelo." I-bandwidth ehlobene efinyelelwa yidivayisi ayikaze ibonwe kunoma yiliphi ibanga lemvamisa, okumelela igxathu elikhulu lama-multiplexer ahlanganisiwe.
Ama-multiplexer e-polarization abalulekile ekuxhumaneni kwanamuhla njengoba evumela amasignali amaningi ukuthi abelane ngebhendi efanayo yemvamisa, okuthuthukisa kakhulu umthamo wesiteshi.
Idivayisi entsha ifinyelela lokhu ngokusebenzisa ama-couplers aqondisa i-conical directional kanye ne-anisotropic effective medium cladding. Lezi zingxenye zithuthukisa i-polarization birefringence, okuholela ku-high polarization extinction ratio (PER) kanye ne-wide bandwidth—izici ezibalulekile zezinhlelo zokuxhumana ze-terahertz ezisebenzayo.
Ngokungafani nemiklamo yendabuko encike kuma-waveguides asymmetric ayinkimbinkimbi futhi ancike kuma-frequency, i-multiplexer entsha isebenzisa i-anisotropic cladding enokuxhomekeka okuncane kwama-frequency. Le ndlela isebenzisa ngokugcwele i-bandwidth eyanele enikezwa yi-conical couplers.
Umphumela uba yi-bandwidth encane eseduze no-40%, i-PER ejwayelekile idlula u-20 dB, kanye nokulahlekelwa okuncane kokufakwa okungu-1 dB. Lezi zilinganiso zokusebenza zidlula kakhulu lezo zemiklamo ye-optical kanye ne-microwave ekhona, evame ukuba ne-bandwidth encane kanye nokulahlekelwa okukhulu.
Umsebenzi wethimba locwaningo awugcini nje ngokuthuthukisa ukusebenza kahle kwezinhlelo ze-terahertz kodwa futhi ubeka isisekelo senkathi entsha ekuxhumaneni okungenantambo. UDkt. Gao waphawula, "Lokhu kusungula izinto ezintsha kuyimbangela ebalulekile yokuvula amandla okuxhumana kwe-terahertz." Izinhlelo zokusebenza zifaka phakathi ukusakazwa kwevidiyo okunencazelo ephezulu, i-augmented reality, kanye namanethiwekhi eselula esizukulwane esilandelayo njenge-6G.
Izixazululo zokuphathwa kwe-terahertz polarization zendabuko, njenge-orthogonal mode transducers (OMTs) ezisekelwe kuma-waveguide ensimbi angunxande, zibhekene nemikhawulo emikhulu. Ama-waveguide ensimbi ahlangabezana nokulahlekelwa okukhulu kwe-ohmic kuma-frequency aphezulu, futhi izinqubo zawo zokukhiqiza ziyinkimbinkimbi ngenxa yezidingo eziqinile zejometri.
Ama-multiplexer e-optical polarization, okuhlanganisa lawo asebenzisa ama-interferometer e-Mach-Zehnder noma amakristalu e-photonic, anikeza ukuhlanganiswa okungcono kanye nokulahlekelwa okuphansi kodwa ngokuvamile adinga ukuhweba phakathi komkhawulokudonsa, ukuqina, kanye nobunzima bokukhiqiza.
Ama-couplers aqondisayo asetshenziswa kabanzi ezinhlelweni ze-optical futhi adinga i-birefringence enamandla ye-polarization ukuze kufinyelelwe usayizi omncane kanye ne-PER ephezulu. Kodwa-ke, anqunyelwe yi-bandwidth encane kanye nokuzwela ekubekezeleleni kokukhiqiza.
I-multiplexer entsha ihlanganisa izinzuzo zama-couplers aqondisa i-conical kanye ne-medium cladding ephumelelayo, inqoba le mikhawulo. I-anisotropic cladding ibonisa i-birefringence ebalulekile, iqinisekisa i-PER ephezulu ku-bandwidth ebanzi. Lo mgomo wokuklama uphawula ukuphambuka ezindleleni zendabuko, okunikeza ikhambi elikwaziyo ukulinganiswa nelisebenzayo lokuhlanganiswa kwe-terahertz.
Ukuqinisekiswa kokuhlolwa kwe-multiplexer kuqinisekisile ukusebenza kwayo okumangalisayo. Idivayisi isebenza kahle ebangeni lama-225-330 GHz, ifinyelela i-bandwidth encane engu-37.8% ngenkathi igcina i-PER engaphezu kwama-20 dB. Ubukhulu bayo obuncane kanye nokuhambisana kwayo nezinqubo zokukhiqiza ezijwayelekile kuyenza ifaneleke ekukhiqizweni ngobuningi.
UDkt. Gao waphawula, "Lokhu kusungula akugcini nje ngokuthuthukisa ukusebenza kahle kwezinhlelo zokuxhumana ze-terahertz kodwa futhi kuvula indlela yamanethiwekhi angenantambo asheshayo futhi anamandla kakhulu."
Ukusetshenziswa okungenzeka kwalolu buchwepheshe kudlulela ngale kwezinhlelo zokuxhumana. Ngokuthuthukisa ukusetshenziswa kwe-spectrum, i-multiplexer ingathuthukisa intuthuko emikhakheni efana ne-radar, i-imaging, kanye ne-Internet of Things. "Kungakapheli neminyaka eyishumi, silindele ukuthi lobu buchwepheshe be-terahertz busetshenziswe kabanzi futhi buhlanganiswe emikhakheni eyahlukene," kusho uSolwazi Withayachumnankul.
I-multiplexer ingahlanganiswa kalula namadivayisi angaphambilini okwakha imisebe athuthukiswe yithimba, okwenza kube nokusebenza kokuxhumana okuthuthukisiwe epulatifomu ehlanganisiwe. Lokhu kuhambisana kugqamisa ukuguquguquka kanye nokukhula kwepulatifomu ye-dielectric waveguide esebenzayo enesigqoko esiphakathi nendawo.
Okutholakele kocwaningo lwethimba kushicilelwe ephephabhukwini i-Laser & Photonic Reviews, kugcizelela ukubaluleka kwazo ekuthuthukiseni ubuchwepheshe be-photonic terahertz. USolwazi Fujita waphawula, "Ngokunqoba izithiyo zobuchwepheshe ezibalulekile, lokhu kusungula izinto ezintsha kulindeleke ukuthi kuvuselele intshisekelo nomsebenzi wocwaningo kulo mkhakha."
Abacwaningi balindele ukuthi umsebenzi wabo uzokhuthaza izinhlelo zokusebenza ezintsha kanye nokuthuthukiswa kobuchwepheshe eminyakeni ezayo, okuzoholela ekukhiqizweni kwemikhiqizo kanye nemikhiqizo yezentengiselwano.
Le multiplexer imele isinyathelo esibalulekile sokuqhubekela phambili ekuvuleni amandla okuxhumana kwe-terahertz. Ibeka indinganiso entsha yamadivayisi e-terahertz ahlanganisiwe ngezilinganiso zayo zokusebenza ezingakaze zibonwe ngaphambili.
Njengoba isidingo samanethiwekhi okuxhumana asheshayo futhi anomthamo ophezulu siqhubeka nokukhula, ukusungula izinto ezintsha okunjalo kuzodlala indima ebalulekile ekwakheni ikusasa lobuchwepheshe obungenantambo.
Isikhathi sokuthunyelwe: Disemba 16-2024