Ibhendi yokuxhumana ye-Optical, i-ultra-thin Optical resonator

Ibhendi yokuxhumana ye-Optical, i-ultra-thin Optical resonator
Ama-Optical resonators angakwazi ukubeka ubude obuthile bamaza okukhanya endaweni elinganiselwe, futhi abe nezinhlelo zokusebenza ezibalulekile ekusebenzelaneni kokukhanya,ukuxhumana optical, inzwa yokubona, nokuhlanganiswa kokubona. Usayizi we-resonator ngokuyinhloko uncike ezicini ezibonakalayo kanye nobude begagasi obusebenzayo, isibonelo, ama-silicon resonator asebenza ebhendini eseduze ye-infrared ngokuvamile adinga izakhiwo zokubona zamakhulu ama-nanometers nangaphezulu. Eminyakeni yamuva nje, ama-ultra-thin planar optical resonators adonse ukunaka okukhulu ngenxa yezicelo zawo ezingase zibe khona kumbala wesakhiwo, i-holographic imaging, i-light field regulation kanye namadivayisi we-optoelectronic. Indlela yokunciphisa ukushuba kwe-planar resonators kungenye yezinkinga ezinzima abacwaningi ababhekana nazo.
Ihlukile ezintweni ezivamile ze-semiconductor, izivikeli ze-3D ze-topological (ezifana ne-bismuth telluride, i-antimony telluride, i-bismuth selenide, njll.) ziyizinto ezintsha zolwazi ezinezimo zensimbi ezivikelwe ngokwe-topologically kanye nezimo zokuvimba. Isimo esingaphezulu sivikelwe ukulinganisa kokuguquguquka kwesikhathi, futhi ama-electron aso awahlakazwanga ukungcola okungezona okukazibuthe, okunamathemba okusebenza abalulekile ku-low-power quantum computing kanye namadivayisi we-spintronic. Ngasikhathi sinye, izinto zokwakha ze-topological insulator nazo zibonisa izakhiwo ezinhle kakhulu zokubona, njenge-high refractive index, enkulu engaqondile.opticali-coefficient, ububanzi be-spectrum yokusebenza, ukuqina, ukuhlanganiswa okulula, njll., okunikeza inkundla entsha yokufezekiswa kokulawula ukukhanya kanyeamadivaysi e-optoelectronic.
Ithimba labacwaningi e-China lenze isiphakamiso sendlela yokwenziwa kwama-optical resonators mncane kakhulu ngokusebenzisa indawo enkulu ekhulisa i-bismuth telluride topological insulator nanofilms. I-Optical cavity ibonisa izici ezisobala zokumuncwa kwe-resonance eduze nebhendi ye-infrared. I-Bismuth telluride inenkomba ephezulu kakhulu yokuphinda iphendule engaphezulu kuka-6 ebhendini yokuxhumana ye-optical (iphezulu kunenkomba ye-refractive yezinto zendabuko eziphezulu ze-refractive index ezifana ne-silicon ne-germanium), ukuze ubukhulu be-optical cavity bufinyelele ingxenye yamashumi amabili ye-resonance. ubude begagasi. Ngesikhathi esifanayo, i-resonator ebonakalayo ifakwe ku-crystal ye-photonic ene-dimensional, futhi umphumela wokubonakala obala owenziwe ngu-electromagnetic ubonwa ebhendini yokuxhumana ye-optical, okubangelwa ukuhlangana kwe-resonator ne-plasmon ye-Tamm kanye nokuphazamiseka kwayo okulimazayo. . Impendulo ye-spectral yalo mphumela incike kubukhulu be-resonator ebonakalayo futhi iqinile ekushintsheni inkomba ye-ambient refractive. Lo msebenzi uvula indlela entsha yokufezeka kwe-ultrathin optical cavity, i-topological insulator material regulation kanye nemishini ye-optoelectronic.
Njengoba kuboniswe ku-FIG. 1a kanye no-1b, i-optical resonator yakhiwa ikakhulukazi i-bismuth telluride topological insulator kanye nama-nanofilm esiliva. I-bismuth telluride nanofilms elungiselelwe i-magnetron sputtering inendawo enkulu kanye ne-flatness enhle. Lapho ukushuba kwe-bismuth telluride namafilimu esiliva kungu-42 nm no-30 nm, ngokulandelana, i-optical cavity ibonisa ukumuncwa kwe-resonance eqinile ebhendini engu-1100 ~ 1800 nm (Umfanekiso 1c). Lapho abacwaningi behlanganisa lesi sikhala sokukhanya kwikristalu ye-photonic eyenziwe ngezitaki ezishintshayo zezendlalelo ze-Ta2O5 (182 nm) kanye ne-SiO2 (260 nm) (Umfanekiso 1e), isigodi sokumunca esihlukile (Umfanekiso 1f) sivele eduze nendawo yokuqala yokumunca ezwakalayo (~ 1550 nm), ofana nomthelela osobala we-electromagnetic okhiqizwa amasistimu e-athomu.

I-bismuth telluride impahla ibonakala ngokudluliswa kwe-electron microscopy kanye ne-ellipsometry. I-FIG. I-2a-2c ibonisa ukudluliswa kwama-electron micrographs (izithombe ezinokulungiswa okuphezulu) namaphethini akhethiwe we-electron diffraction we-bismuth telluride nanofilms. Kungabonakala emfanekisweni ukuthi i-bismuth telluride nanofilms elungisiwe iyizinto ze-polycrystalline, futhi i-orientation enkulu yokukhula yi-(015) indiza yekristalu. Umfanekiso 2d-2f ubonisa inkomba eyinkimbinkimbi ye-refractive ye-bismuth telluride elinganiswa nge-ellipsometer kanye nesimo sendawo ehlanganisiwe kanye nenkomba ye-state complex refractive. Imiphumela ibonisa ukuthi i-coefficient yokushabalala yesimo esingaphezulu sikhulu kunenkomba ye-refractive ebangeni elingu-230~1930 nm, ebonisa izici ezifana nensimbi. Inkomba ye-refractive yomzimba ingaphezu kuka-6 lapho ubude begagasi bukhulu kune-1385 nm, ephakeme kakhulu kunaleyo ye-silicon, i-germanium nezinye izinto zendabuko ezisezingeni eliphezulu ze-refractive kule bhendi, ebeka isisekelo sokulungiswa kwe-ultra. -ama-resonators akhanyayo amancane. Abacwaningi baveza ukuthi lokhu kuwukugcwaliseka kokuqala okubikiwe kwe-topological insulator planar optical cavity enogqinsi lwamashumi ama-nanometer kuphela ebhendini yokuxhumana ye-optical. Kamuva, i-spectrum yokumuncwa kanye nobude beza beza bekhala be-ultra-thin optical cavity kukalwa ngogqinsi lwe-bismuth telluride. Okokugcina, umthelela wokujiya kwefilimu yesiliva ku-spectra ebonakalayo eyenziwe ngogesi ku-bismuth telluride nanocavity/photonic crystal structures uyaphenywa.

Ngokulungiselela indawo enkulu amafilimu azacile ayisicaba we-bismuth telluride topological insulators, nokusebenzisa ngokunenzuzo inkomba ye-ultra-high refractive yezinto ze-Bismuth telluride eduze nebhendi ye-infrared, kutholakala i-planar optical cavity enogqinsi lwamashumi ama-nanometers kuphela. I-ultra-thin optical cavity ingakwazi ukubona ukumuncwa kokukhanya kwe-resonant esebenza kahle kubhendi ye-infrared eseduze, futhi inenani elibalulekile lohlelo lokusebenza ekuthuthukisweni kwamadivayisi e-optoelectronic ebhendi yokuxhumana yokubona. Ugqinsi lwe-bismuth telluride optical cavity luhambisana ne-resonant wavelength, futhi luncane kunalolo lwe-silicon efanayo ne-germanium optical cavity. Ngasikhathi sinye, i-bismuth telluride optical cavity ihlanganiswe ne-photonic crystal ukuze kuzuzwe umphumela we-optical ongajwayelekile ofana nokungafihli okwenziwa yi-electromagnetic kwesistimu ye-athomu, ehlinzeka ngendlela entsha yokulawulwa kwe-spectrum ye-microstructure. Lolu cwaningo ludlala indima ethile ekukhuthazeni ucwaningo lwezinto ezisetshenziswayo ze-topological insulator ekulawuleni ukukhanya namadivayisi asebenza ngokubonakalayo.