Ibhendi yonxibelelwano ye-Optical, i-ultra-thin optical resonator

Ibhendi yonxibelelwano ye-Optical, i-ultra-thin optical resonator
I-resonators ye-Optical inokubeka i-wavelengths ethile yamaza okukhanya kwindawo elinganiselweyo, kwaye ibe nezicelo ezibalulekileyo kwintsebenziswano yokukhanya,unxibelelwano lwamehlo, imvakalelo yokubona, kunye nokudityaniswa kwamehlo. Ubungakanani be-resonator ubukhulu becala buxhomekeke kwiimpawu zemathiriyeli kunye nobude bobude bokusebenza, umzekelo, ii-silicon resonators ezisebenza kufutshane nebhendi ye-infrared zihlala zifuna izakhiwo zokubona ezingamakhulu eenanometers nangaphezulu. Kwiminyaka yakutshanje, ii-resonators ze-ultra-thin planar optical ziye zatsala ingqalelo enkulu ngenxa yezicelo zazo ezinokubakho kumbala wesakhiwo, i-holographic imaging, ukukhanya kwebala kunye nezixhobo ze-optoelectronic. Indlela yokunciphisa ubukhulu bee-resonators ezicwangcisiweyo enye yeengxaki ezinzima ezijongene nabaphandi.
Ukwahluka kwizinto zemveli ze-semiconductor, i-3D insulators topological (ezifana ne-bismuth telluride, i-antimony telluride, i-bismuth selenide, njl.) zizinto ezintsha zolwazi ezinomgangatho wesinyithi okhuselweyo we-topologically kunye ne-insulator states. Ubume bomphezulu bukhuselwe yi-symmetry ye-inversion yexesha, kwaye ii-electron zayo azihlakazwanga ngokungcola okungeyona imagnetic, enemibono ebalulekileyo yesicelo kwi-low-power quantum computing kunye nezixhobo ze-spitronic. Kwangaxeshanye, izixhobo ze-insulator ye-topological zikwabonisa iipropathi ezigqwesileyo zamehlo, ezifana nesalathiso se-refractive ephezulu, enkulu engahambelaniyo.ukubonai-coefficient, uluhlu olubanzi lwe-spectrum yokusebenza, ukulinganisa, ukudibanisa okulula, njl., okubonelela ngeqonga elitsha lofezekiso lolawulo lokukhanya kunyeizixhobo ze-optoelectronic.
Iqela lophando e-China licebise indlela yokwenziwa kwe-ultra-thin optical resonators ngokusebenzisa indawo enkulu yokukhulisa i-bismuth telluride topological insulator nanofilms. I-Optical cavity ibonisa iimpawu ezicacileyo zokufunxwa kwe-resonance kufutshane nebhendi ye-infrared. I-Bismuth telluride ine-index ephezulu kakhulu ye-refractive engaphezulu kwe-6 kwibhendi yonxibelelwano lwe-optical (iphezulu kunesalathiso se-refractive sezinto eziqhelekileyo ze-refractive index index ezifana ne-silicon kunye ne-germanium), ukwenzela ukuba ubukhulu be-optical cavity bufikelele kwi-1-20 ye-resonance. ubude bamaza. Ngelo xesha, i-resonator ebonakalayo ifakwe kwi-crystal ye-photonic ene-dimensional, kwaye inoveli ye-electromagnetic induced transparency effect ibonwa kwibhendi yonxibelelwano lwe-optical, ngenxa yokudibanisa i-resonator kunye ne-plasmon ye-Tamm kunye nokuphazamiseka kwayo okulimazayo. . Impendulo ye-spectral yale mpembelelo ixhomekeke kubukhulu be-resonator ye-optical kwaye inamandla ekutshintsheni isalathisi esijikelezayo se-ambient. Lo msebenzi uvula indlela entsha yokufezekiswa kwe-ultrathin optical cavity, i-topological insulator material spectrum regulation kunye nezixhobo ze-optoelectronic.
Njengoko kubonisiwe kwi-FIG. I-1a kunye ne-1b, i-resonator ye-optical iqulunqwe kakhulu yi-bismuth telluride topological insulator kunye ne-nanofilms zesilivere. I-bismuth telluride nanofilms elungiselelwe yi-magnetron sputtering inommandla omkhulu kunye ne-flatness elungileyo. Xa ubukhulu be-bismuth telluride kunye neefilimu zesilivere ziyi-42 nm kunye ne-30 nm, ngokulandelanayo, i-optical cavity ibonisa ukuxutywa kwe-resonance eyomeleleyo kwibhendi ye-1100 ~ 1800 nm (Umfanekiso 1c). Xa abaphandi badibanisa lo mgodi wokukhanya kwikristale yefotonic eyenziwe ngokutshintshana kwezipaki zeTa2O5 (182 nm) kunye neSiO2 (260 nm) iileya (Umfanekiso 1e), intlambo eyahlukileyo yokufunxa (Umfanekiso 1f) yavela kufutshane nencopho yokuqala yokufunxa (~ 1550 nm), efana nesiphumo sokungafihli sombane esiveliswe ziinkqubo zeathom.

Izinto eziphathekayo ze-bismuth telluride zibonakaliswe ngokudluliselwa kwe-electron microscopy kunye ne-ellipsometry. IKHIWANE. I-2a-2c ibonisa ukuhanjiswa kwe-electron micrographs (imifanekiso ene-high-resolution) kunye neepatheni ezikhethiweyo ze-electron diffraction ye-bismuth telluride nanofilms. Ingabonwa kumfanekiso ukuba i-bismuth telluride nanofilms elungiselelwe zizinto ze-polycrystalline, kwaye i-orientation ephambili yokukhula (015) i-crystal plane. Umzobo we-2d-2f ubonisa isalathisi esiyinkimbinkimbi se-bismuth telluride elinganiswa nge-ellipsometer kunye ne-fitted surface state kunye ne-state complex refractive index. Iziphumo zibonisa ukuba i-coefficient yokuphela kwe-surface state inkulu kune-index refractive kuluhlu lwe-230 ~ 1930 nm, ebonisa iimpawu ezifana nentsimbi. Isalathiso se-refractive somzimba singaphezulu kwe-6 xa ubude be-waveleng bukhulu kune-1385 nm, ephakamileyo kakhulu kune-silicon, i-germanium kunye nezinye izinto zemveli ze-high-refractive index kule bhanti, ebeka isiseko sokulungiselela i-ultra. -i-resonators zamehlo ezincinci. Abaphandi bachaza ukuba le yingxelo yokuqala yokuqonda i-topological insulator planar optical cavity enobunzima bamashumi eenanometers kuphela kwibhendi yonxibelelwano lwamehlo. Emva koko, i-spectrum yokufunxa kunye ne-resonance wavelength ye-ultra-thin optical cavity yalinganiswa ngobunzima be-bismuth telluride. Okokugqibela, isiphumo sobunzima befilimu yesilivere kwimbonakalo ye-electromagnetic induced transparency in bismuth telluride nanocavity/photonic crystal structures ziyaphandwa.

Ngokulungiselela indawo enkulu iifilimu ezisicaba ezicekethekileyo ze-bismuth telluride topological insulators, kunye nokuthatha ithuba le-ultra-high refractive index ye-Bismuth telluride materials kufutshane nebhendi ye-infrared, i-planar optical cavity enobunzima bamashumi e-nanometers kuphela ifunyenwe. I-ultra-thin optical cavity inokuqonda ukukhanya kwe-resonant esebenzayo kwibhendi ye-infrared ekufutshane, kwaye inexabiso elibalulekileyo lesicelo kuphuhliso lwezixhobo ze-optoelectronic kwibhendi yonxibelelwano lwamehlo. Ubukhulu be-bismuth telluride optical cavity bumgca ukuya kwi-resonant wavelength, kwaye incinci kune-silicon efanayo kunye ne-germanium optical cavity. Kwangaxeshanye, i-bismuth telluride optical cavity idityaniswe ne-photonic crystal ukufezekisa isiphumo esingathandekiyo esifana ne-electromagnetic induced transparency ye-atomic system, ebonelela ngendlela entsha yolawulo lwe-spectrum ye-microstructure. Olu pho nonongo ludlala indima ethile ekukhuthazeni uphando lwezixhobo ze-insulator ye-topological kulawulo lokukhanya kunye nezixhobo zokusebenza ezibonakalayo.