Uhlobo olusha lwe-terahertz multiplexer luphindeke kabili umthamo wedatha futhi lwathuthukisa kakhulu ukuxhumana kwe-6G ngomkhawulokudonsa ongakaze ubonwe kanye nokulahleka kwedatha okuphansi.
Abacwaningi bethule i-multi-wide band terahertz multiplexer ephinda kabili umthamo wedatha futhi ilethe intuthuko eguquguqukayo ku-6G nangaphezulu. (Umthombo wesithombe: Getty Images)
Isizukulwane esilandelayo sokuxhumana okungenazintambo, esimelelwe ubuchwepheshe be-terahertz, sithembisa ukuguqula ukudluliswa kwedatha.
Lezi zinhlelo zisebenza kumafrikhwensi e-terahertz, zinikeza umkhawulokudonsa ongenakuqhathaniswa wokudluliswa kwedatha okushesha kakhulu nokuxhumana. Nokho, ukuze kufezeke ngokugcwele lokhu okungenzeka, izinselelo ezinkulu zobuchwepheshe kufanele kunqotshwe, ikakhulukazi ekuphatheni nasekusebenziseni ngempumelelo i-spectrum ekhona.
Inqubekelaphambili enkulu iye yabhekana nale nselele: i-ultra-wideband yokuqala edidiyelwe ye-terahertz polarization (de)multiplexer etholakala endaweni yesikhulumi ye-silicon engenaso isisekelo.
Lo mklamo wokusungula uqondise ibhendi ye-sub-terahertz J (220-330 GHz) futhi uhlose ukuguqula ukuxhumana kwe-6G nangaphezulu. Idivayisi iphinda kabili umthamo wedatha ngenkathi igcina izinga eliphansi lokulahleka kwedatha, ivula indlela yamanethiwekhi angenantambo asebenza kahle nathembekile anesivinini esiphezulu.
Ithimba elilandela lesi senzakalo esiyingqopha-mlando lihlanganisa uSolwazi Withawat Withayachumnankul wase-University of Adelaide's School of Electrical and Mechanical Engineering, uDkt. Weijie Gao, manje osengumcwaningi we-postdoctoral e-Osaka University, kanye noSolwazi Masayuki Fujita.
USolwazi Withayachumnankul uthe, "I-multiplexer ye-polarization ehlongozwayo ivumela ukusakazwa kwedatha eminingi ukuthi idluliselwe ngesikhathi esisodwa ngaphakathi kwebhendi yefrikhwensi efanayo, okuphinda kabili umthamo wedatha." Umkhawulokudonsa ohlobene otholwe idivayisi awukaze ubonwe kulo lonke ibanga lemvamisa, okumelela ukweqa okubalulekile kwama-multiplexer ahlanganisiwe.
Ama-multiplexer e-polarization abalulekile ekuxhumaneni kwesimanje njengoba enza amasiginali amaningi abelane ngebhendi yefrikhwensi efanayo, athuthukisa kakhulu umthamo wesiteshi.
Idivayisi entsha ifinyelela lokhu ngokusebenzisa ama-conical directional couplers kanye ne-anisotropic medium cladding esebenzayo. Lezi zingxenye zithuthukisa i-polarization birefringence, okuholela ekuqothulweni okuphezulu kwe-polarization (PER) kanye nomkhawulokudonsa obanzi—izici ezibalulekile zezinhlelo zokuxhumana ze-terahertz ezisebenza kahle.
Ngokungafani namadizayini avamile ancike kumagagasi asymmetric ayinkimbinkimbi futhi ancike imvamisa, i-multiplexer entsha isebenzisa i-anisotropic cladding encike kuphela imvamisa kancane. Le ndlela isebenzisa ngokugcwele i-bandwidth eyanele enikezwa ama-conical couplers.
Umphumela uba umkhawulokudonsa oyingxenye osondele ku-40%, isilinganiso se-PER esidlula i-20 dB, kanye nokulahlekelwa okuncane kokufakwa okucishe kube ngu-1 dB. Lawa mamethrikhi okusebenza awadlula kude lawo emiklamo ekhona ye-optical neye-microwave, evame ukuhlushwa umkhawulokudonsa omncane nokulahlekelwa okuphezulu.
Umsebenzi wethimba locwaningo awugcini nje ngokuthuthukisa ukusebenza kahle kwezinhlelo ze-terahertz kodwa futhi wenza isisekelo senkathi entsha yokuxhumana okungenantambo. UDkt. Gao waphawula, "Lokhu kusungula kuwumshayeli oyinhloko ekuvuleni amandla okuxhumana kwe-terahertz." Izinhlelo zokusebenza zifaka ukusakazwa kwevidiyo enencazelo ephezulu, okwangempela okungathandwa kwabathelisi esikubona, namanethiwekhi eselula esizukulwane esilandelayo njenge-6G.
Izixazululo zokulawula i-terahertz polarization, njengama-orthogonal mode transducers (OMTs) asekelwe kumagagasi ensimbi angunxande, abhekana nemikhawulo ebalulekile. Okuhlangenwe nakho kwe-Metal waveguides kukhuphule ukulahleka kwe-ohmic kumafrikhwensi aphezulu, futhi izinqubo zawo zokukhiqiza ziyinkimbinkimbi ngenxa yezidingo eziqinile zejometri.
Ama-multiplexer e-optical polarization, okuhlanganisa lawo asebenzisa ama-interferometers e-Mach-Zehnder noma amakristalu e-photonic, anikeza ukuhlanganiswa okungcono nokulahlekelwa okuphansi kodwa ngokuvamile adinga ukuhwebelana phakathi komkhawulokudonsa, ukubumbana, nobunkimbinkimbi bokukhiqiza.
Ama-couplers aqondisayo asetshenziswa kakhulu ezinhlelweni zokubona futhi adinga i-polarization birefringence eqinile ukuze kuzuzwe usayizi ohlangene kanye ne-PER ephezulu. Kodwa-ke, banqunyelwe umkhawulokudonsa omncane kanye nokuzwela ekubekezeleni kokukhiqiza.
I-multiplexer entsha ihlanganisa izinzuzo ze-conical directional couplers kanye ne-medium cladding ephumelelayo, inqoba le mikhawulo. I-anisotropic cladding ibonisa i-birefringence ebalulekile, iqinisekisa i-PER ephezulu kuwo wonke umkhawulokudonsa obanzi. Lo mgomo wokuklama uphawula ukusuka ezindleleni zendabuko, uhlinzeka ngesixazululo esinokwethenjelwa nesisebenzayo sokuhlanganiswa kwe-terahertz.
Ukuqinisekisa kokuhlola kwe-multiplexer kuqinisekise ukusebenza kwayo okukhethekile. Idivayisi isebenza kahle kububanzi obungu-225-330 GHz, ifinyelela umkhawulokudonsa oyingxenyana ongu-37.8% kuyilapho igcina i-PER engaphezu kuka-20 dB. Usayizi wayo ohlangene kanye nokuhambisana nezinqubo ezijwayelekile zokukhiqiza kuyenza ifanelekele ukukhiqizwa ngobuningi.
UDkt. Gao waphawula, "Lokhu okusha akugcini nje ngokuthuthukisa ukusebenza kahle kwezinhlelo zokuxhumana ze-terahertz kodwa futhi kuvula indlela yamanethiwekhi angenantambo anamandla futhi anokwethenjelwa kakhulu."
Ukusetshenziswa okungaba khona kwalobu buchwepheshe kudlulela ngale kwezinhlelo zokuxhumana. Ngokuthuthukisa ukusetshenziswa kwe-spectrum, i-multiplexer ingathuthukisa intuthuko emikhakheni efana ne-radar, imaging, kanye ne-inthanethi Yezinto. "Phakathi neshumi leminyaka, silindele ukuthi lobu buchwepheshe be-terahertz bamukelwe kabanzi futhi buhlanganiswe ezimbonini ezahlukahlukene," kusho uSolwazi Withayachumnankul.
I-multiplexer ingabuye ihlanganiswe ngaphandle komthungo nemishini yangaphambilini eyenza i-beamforming ethuthukiswe yiqembu, inike amandla ukusebenza okuthuthukile kwezokuxhumana endaweni ehlanganisiwe. Lokhu kuhambisana kugqamisa ukuguquguquka nokunwebeka kweplatifomu ye-waveguide ye-dielectric waveguide esebenza kahle ye-medium-clad.
Okutholwe ocwaningweni lweqembu kushicilelwe kujenali ye-Laser & Photonic Reviews, kugcizelela ukubaluleka kwakho ekuthuthukiseni ubuchwepheshe be-photonic terahertz. UProfesa Fujita waphawula, "Ngokunqoba izithiyo ezibucayi zobuchwepheshe, lokhu okusha kulindeleke ukuthi kushukumise isithakazelo nomsebenzi wocwaningo kulo mkhakha."
Abacwaningi balindele ukuthi umsebenzi wabo uzogqugquzela izinhlelo zokusebenza ezintsha kanye nentuthuko eyengeziwe yezobuchwepheshe eminyakeni ezayo, ekugcineni kuholele kuma-prototypes nemikhiqizo yezohwebo.
Le multiplexer imele isinyathelo esibalulekile esiya phambili ekuvuleni amandla okuxhumana kwe-terahertz. Isetha indinganiso entsha yamadivayisi ahlanganisiwe e-terahertz namamethrikhi ayo okusebenza angakaze abonwe.
Njengoba isidingo samanethiwekhi okuxhumana anesivinini esikhulu, aphezulu siqhubeka sikhula, izinto ezintsha ezinjalo zizodlala indima ebalulekile ekulolongeni ikusasa lobuchwepheshe obungenawaya.
Isikhathi sokuthumela: Dec-16-2024