Ibhendi yokuxhumana ebonakalayo, i-resonator ebonakalayo encane kakhulu

Ibhendi yokuxhumana ebonakalayo, i-resonator ebonakalayo encane kakhulu
Ama-resonator e-optical angakwazi ukuthola amaza athile amaza okukhanya endaweni elinganiselwe, futhi abe nezinhlelo ezibalulekile ekusebenzisaneni kwezinto zokukhanya,ukuxhumana okubonakalayo, ukuzwa okubonakalayo, kanye nokuhlanganiswa kokukhanya. Ubukhulu be-resonator buxhomeke kakhulu ezicini zezinto ezibonakalayo kanye nobude besikhathi sokusebenza, isibonelo, ama-resonator e-silicon asebenza ku-band ye-infrared eseduze avame ukudinga izakhiwo ze-optical ezingama-nanometer angamakhulu nangaphezulu. Eminyakeni yamuva nje, ama-resonator e-planar optical anciphile kakhulu adonsele ukunaka okukhulu ngenxa yezicelo zawo ezingaba khona kumbala wesakhiwo, izithombe ze-holographic, ukulawulwa kwensimu yokukhanya kanye namadivayisi e-optoelectronic. Indlela yokunciphisa ukujiya kwama-resonator e-planar ingenye yezinkinga ezinzima abacwaningi ababhekene nazo.
Ngokungafani nezinto ze-semiconductor zendabuko, izivikeli ze-topological ze-3D (njenge-bismuth telluride, i-antimony telluride, i-bismuth selenide, njll.) ziyizinto ezintsha zolwazi ezinezimo zobuso bensimbi ezivikelwe ngokwe-topological kanye nezimo zokuvikela. Isimo sobuso sivikelwe ukulingana kokuguqulwa kwesikhathi, futhi ama-electron awo awahlakazeki ukungcola okungeyona i-magnetic, okunamathemba abalulekile okusetshenziswa kumadivayisi e-quantum computing anamandla aphansi kanye ne-spintronic. Ngesikhathi esifanayo, izinto zokuvikela ze-topological nazo zibonisa izakhiwo ezinhle kakhulu zokukhanya, njenge-refractive index ephezulu, i-nonlinear enkulu.ukukhanyai-coefficient, ububanzi be-spectrum yokusebenza, ukulungiswa, ukuhlanganiswa okulula, njll., okunikeza ipulatifomu entsha yokufezwa kokulawulwa kokukhanya kanyeamadivayisi e-optoelectronic.
Ithimba locwaningo eShayina liphakamise indlela yokwenza ama-resonator e-optical acwebezelayo kakhulu ngokusebenzisa ama-nanofilms e-insulator e-topological ekhula endaweni enkulu. I-optical cavity ikhombisa izici ezicacile zokumuncwa kwe-resonance ku-band eseduze ne-infrared. I-Bismuth telluride ine-refractive index ephezulu kakhulu engaphezu kuka-6 ku-optical communication band (ephakeme kune-refractive index yezinto zendabuko ze-refractive index ezifana ne-silicon ne-germanium), ukuze ubukhulu be-optical cavity bufinyelele ingxenye eyodwa yamashumi amabili ye-resonance wavelength. Ngesikhathi esifanayo, i-optical resonator ifakwa ku-one-dimensional photonic crystal, futhi umphumela omusha wokucaca obangelwa yi-electromagnetically ubonakala ku-optical communication band, okubangelwa ukuhlanganiswa kwe-resonator ne-Tamm plasmon kanye nokuphazamiseka kwayo okubhubhisayo. Impendulo ye-spectral yalo mphumela incike ekujikeni kwe-optical resonator futhi inamandla ekushintsheni kwe-ambient refractive index. Lo msebenzi uvula indlela entsha yokufezwa kwe-ultrathin optical cavity, i-topological insulator material spectrum regulation kanye namadivayisi e-optoelectronic.
Njengoba kuboniswe ku-FIG. 1a no-1b, i-optical resonator yakhiwe kakhulu yi-bismuth telluride topological insulator kanye nama-nanofilms esiliva. Ama-nanofilms e-bismuth telluride alungiselelwe yi-magnetron sputtering anendawo enkulu futhi athambile kahle. Lapho ubukhulu bamafilimu e-bismuth telluride kanye nesiliva bungu-42 nm no-30 nm, ngokulandelana, i-optical cavity ibonisa ukumuncwa okunamandla kwe-resonance kubhendi engu-1100 ~ 1800 nm (Isithombe 1c). Lapho abacwaningi behlanganisa le cavity ye-optical ku-crystal ye-photonic eyenziwe ngezingqimba ezishintshanayo ze-Ta2O5 (182 nm) kanye ne-SiO2 (260 nm) (Isithombe 1e), isigodi esihlukile sokumuncwa (Isithombe 1f) savela eduze kwe-resonant absorption peak yokuqala (~1550 nm), efana nomphumela wokucaca obangelwa yi-electromagnetically okhiqizwa izinhlelo ze-athomu.

Izinto ze-bismuth telluride zazibonakala nge-transmission electron microscopy kanye ne-ellipsometry. UMFANELO 2a-2c ukhombisa ama-micrograph e-transmission electron (izithombe ezinesinqumo esiphezulu) kanye namaphethini akhethiwe e-electron diffraction ama-nanofilms e-bismuth telluride. Kungabonakala esithombeni ukuthi ama-nanofilms e-bismuth telluride alungisiwe ayizinto ze-polycrystalline, futhi indlela eyinhloko yokukhula yi-(015) crystal plane. UMfanekiso 2d-2f ukhombisa inkomba yokukhanya eyinkimbinkimbi ye-bismuth telluride elinganiswa yi-ellipsometer kanye nenkomba yokukhanya ehlanganisiwe yesimo sobuso kanye nesimo. Imiphumela ikhombisa ukuthi i-extinction coefficient yesimo sobuso inkulu kunenkomba yokukhanya ebangeni elingu-230 ~ 1930 nm, ekhombisa izici ezifana nensimbi. Inkomba yokukhanya komzimba ingaphezu kuka-6 uma ubude be-wavelength bungaphezu kuka-1385 nm, okuphakeme kakhulu kuneye-silicon, i-germanium nezinye izinto zendabuko ze-high-refractive index kule band, ebeka isisekelo sokulungiselela ama-resonator e-optical acwebezelayo kakhulu. Abacwaningi bakhomba ukuthi lokhu kungukuqala okubikiwe kokuqalwa kwe-topological insulator planar optical cavity enobukhulu obungama-nanometer ayishumi kuphela ebhendini yokuxhumana ye-optical. Ngemva kwalokho, i-absorption spectrum kanye ne-resonance wavelength ye-ultra-thin optical cavity kwalinganiswa ngobukhulu be-bismuth telluride. Ekugcineni, umphumela wobukhulu befilimu yesiliva kuma-spectra okucaca abangelwa yi-electromagnetically ku-bismuth telluride nanocavity/photonic crystal structures uyaphenywa.

Ngokulungiselela amafilimu amancane ayisicaba e-bismuth telluride topological insulators, kanye nokusebenzisa inkomba yokukhanya ephezulu kakhulu yezinto ze-Bismuth telluride ku-near infrared band, kutholakala i-planar optical cavity enobukhulu obungama-nanometer ayishumi kuphela. I-ultra-thin optical cavity ingafinyelela ukumuncwa kokukhanya okukhanyayo okusebenzayo ku-near infrared band, futhi inenani elibalulekile lokusetshenziswa ekuthuthukisweni kwamadivayisi e-optoelectronic ku-optical communication band. Ubukhulu be-bismuth telluride optical cavity buqondile ku-resonant wavelength, futhi buncane kunobe-silicon ne-germanium optical cavity efanayo. Ngesikhathi esifanayo, i-bismuth telluride optical cavity ihlanganiswe ne-photonic crystal ukuze kufezwe umphumela we-optical ongavamile ofana nokucaca okubangelwa yi-electromagnetic kwesistimu ye-athomu, okunikeza indlela entsha yokulawulwa kwe-spectrum yesakhiwo se-microstructure. Lolu cwaningo ludlala indima ethile ekukhuthazeni ucwaningo lwezinto ze-topological insulator ekulawulweni kokukhanya kanye namadivayisi asebenzayo e-optical.