Xariirka isgaadhsiinta indhaha, resonator indhaha aadka u dhuuban

Xariirka isgaadhsiinta indhaha, resonator indhaha aadka u dhuuban
Resonators indhaha waxay dejin karaan mawjadaha gaarka ah ee hirarka iftiinka ee meel xaddidan, waxayna leeyihiin codsiyo muhiim ah oo ku saabsan isdhexgalka arrimaha iftiinka,isgaarsiinta indhaha, Dareenka indhaha, iyo isdhexgalka indhaha. Cabbirka resonator-ku wuxuu inta badan ku xiran yahay sifooyinka walxaha iyo hirarka hirarka shaqada, tusaale ahaan, resonators silikoon oo ka shaqeeya band infrared dhow sida caadiga ah waxay u baahan yihiin qaab-dhismeedka indhaha ee boqollaal nanometer iyo wixii ka sareeya. Sanadihii la soo dhaafay, resonators planar ultra-dhuuban ayaa soo jiitay dareen badan sababtoo ah codsiyadooda suurtagalka ah ee midabka qaabdhismeedka, sawirka holographic, nidaamka iftiinka iftiinka iyo aaladaha indhaha. Sida loo yareeyo dhumucda resonators planar waa mid ka mid ah dhibaatooyinka adag ee ay la kulmaan cilmi-baarayaasha.
Ka duwan qalabka semiconductor-dhaqameedka, 3D insulators topological (sida bismuth telluride, antimony telluride, bismuth selenide, iwm) waa qalab macluumaad cusub oo leh dalalka dusha biraha topologically ilaaliyo iyo dawladaha insulator. Xaaladda dusha sare waxaa lagu ilaaliyaa summeynta waqtiga roganta, iyo elektaroonnada aysan ku kala firireynin wasakhda aan magnetka ahayn, taas oo leh rajooyin codsi oo muhiim ah xisaabinta quantum-ka hooseeya iyo aaladaha spintronic. Isla mar ahaantaana, qalabka dahaarka topological sidoo kale waxay muujinayaan sifooyin muuqaal ah oo aad u fiican, sida index refractive sare, weyn oo aan toos ahayn.indhahaiskudubarid, kala duwanaansho shaqo balaadhan, tunability, is dhexgalka fudud, iwm.aaladaha optoelectronic.
Koox cilmi baaris ah oo Shiinees ah ayaa soo jeedisay hab loogu talagalay abuurista resonators indhaha aadka u dhuuban iyagoo isticmaalaya dhul ballaaran oo koraya bismuth telluride insulator nanofilms. Godka indhaha waxa uu muujinayaa sifooyin nuugista dhawaaqa oo muuqda ee band infrared dhow. Bismuth telluride waxay leedahay index refractive aad u sarreeya oo ka badan 6 ee band isgaarsiinta indhaha (ka sarreeya index refractive ee qalabka dhaqameed sare refractive index sida silikon iyo germanium), si dhumucda daloolka indhaha u gaadhi karo hal-20th ee resonance. dhererka hirarka. Isla mar ahaantaana, resonator indhaha waxaa lagu shubaa crystal photonic ah hal-cabbir ah, iyo novel ah electromagneticly keeni hufnaan saamayn lagu arkay in band isgaarsiinta indhaha, taas oo ay sabab u tahay isku dhafka resonator la plasmon ah ee Tamm iyo faragelin ay burburisay. . Jawaabta spectral ee saamayntani waxay kuxirantahay dhumucda resonator-ka indhaha waxayna ku adagtahay isbedelka index refractive ambient. Shaqadani waxay furaysaa hab cusub oo lagu xaqiijinayo godka indhaha ee ultrathin, nidaaminta walxaha spectrum insulator-ka iyo aaladaha indhaha.
Sida ku cad FIG. 1a iyo 1b, resonator-ka indhaha waxa uu inta badan ka kooban yahay bismuth telluride insulator topological iyo nanofilms silver. Nanofilms-ka bismuth telluride ee ay diyaarisay xajinta magnetron waxay leeyihiin dhul ballaaran iyo fidsanaan wanaagsan. Marka dhumucda bismuth telluride iyo filimada qalinku ay yihiin 42 nm iyo 30 nm, siday u kala horreeyaan, godka indhaha wuxuu muujiyaa nuugista dhawaaqa xooggan ee band 1100 ~ 1800 nm (Jaantus 1c). Markii cilmi-baarayaashu ay isku dhejiyeen daloolka indhaha ee muraayadda sawir-qaadista oo ka sameysan xirmo kala duwan oo Ta2O5 (182 nm) iyo SiO2 (260 nm) lakabyo (Jaantus 1e), dooxada nuugista oo kala duwan (Jaantus 1f) ayaa ka soo muuqday meel u dhow meesha ugu sarreysa nuugista resonant ee asalka ah (~ 1550 nm), kaas oo la mid ah saamaynta hufnaanta korantada ee ay soo saareen nidaamyada atomiga.

Maaddada sheega bismuth-ka waxaa lagu gartaa gudbinta mikroskoobyada elektarooniga ah iyo ellipsometry. FIG 2a-2c waxay muujinaysaa gudbinta micrographs elektarooniga ah (sawirro qaraar sare leh) iyo qaabab kala duwanaansho elektaroonig ah oo la doortay ee nanofilms bismuth telluride. Waxaa laga arki karaa shaxanka in nanofilms bismuth telluride ee diyaarsan ay yihiin maaddooyinka polycrystalline, iyo jihada kobaca ugu weyni waa (015) diyaaradda crystal. Jaantuska 2d-2f waxa uu tusayaa tusmada dib u soo celinta kakan ee bismuth telluride oo lagu cabiray ellipsometer iyo xaalada dusha sare ee ku rakiban iyo tusaha refractive-ka adag ee gobolka. Natiijooyinku waxay muujinayaan in isku-dhafka baabi'inta ee gobolka dusha sare uu ka weyn yahay index refractive ee inta u dhaxaysa 230 ~ 1930 nm, oo muujinaya sifooyinka birta u eg. Tilmaanta refractive ee jirku waa in ka badan 6 marka mawjadda dhererkeedu ka weyn yahay 1385 nm, taas oo aad uga badan silikoon, germanium iyo qalabyada kale ee dhaqanka sare ee index ee band this, taas oo aasaas u ah diyaarinta ultra ah. - resonators indhaha khafiif ah. Cilmi-baadhayaashu waxay tilmaameen in tani ay tahay xaqiijintii ugu horreysay ee la soo sheegay ee ku saabsan godka indhaha ee insulator insulator oo dhumucdiisu ay tahay tobanaan nanometer oo keliya ee qaybta isgaarsiinta indhaha. Ka dib, xajmiga nuugista iyo dhererka hirarka dhawaaqa ee godka indhaha ee aadka u dhuuban ayaa lagu qiyaasay dhumucda bismuth telluride. Ugu dambeyntiina, saameynta dhumucda filimka qalinka ah ee korantada magnetka ku keentay muuqaalka daahfurnaanta ee bismuth telluride nanocavity/qaab-dhismeedka crystal-photonic waa la baaray.

Diyaarinta filimo dhuuban oo fidsan oo fidsan oo ah bismuth telluride insulators topological, iyo ka faa'iidaysiga tusmada refractive ultra-high ee alaabta Bismuth telluride ee band infrared agteeda, dalool indhaha oo qorshaysan oo dhumucdiisu tahay tobanaan nanometer ayaa la helayaa. Godka indhaha ee aadka u dhuuban wuxuu ogaan karaa nuugista iftiinka resonant ee ku jira band infrared dhow, wuxuuna leeyahay qiime codsi oo muhiim ah horumarinta aaladaha optoelectronic ee band isgaarsiinta indhaha. Dhumucda godka indhaha ee bismuth telluride waa toosan ilaa hirarka hirarka resonant, waana uu ka yar yahay kan la midka ah silikoon iyo godka indhaha ee germanium. Isla mar ahaantaana, godka indhaha ee bismuth telluride waxaa lagu dhex daraa crystal photonic si loo gaaro saameynta indhaha ee aan caadiga ahayn ee la mid ah hufnaanta korantada ee nidaamka atomikada, taas oo bixisa hab cusub oo loogu talagalay nidaaminta spectrum ee qaab-dhismeed yar. Daraasadani waxay door gaar ah ka ciyaartaa kor u qaadida cilmi baarista agabka insulator-ka topological ee nidaaminta iftiinka iyo aaladaha shaqada indhaha.