Xadhka isgaarsiinta indhaha, resonator-ka indhaha ee aadka u khafiifsan

Xadhka isgaarsiinta indhaha, resonator-ka indhaha ee aadka u khafiifsan
Resonators-ka indhaha ayaa ku meelayn kara hirarka gaarka ah ee hirarka iftiinka meel xaddidan, waxayna yeelan karaan codsiyo muhiim ah oo ku saabsan isdhexgalka walxaha iftiinka,isgaarsiinta indhaha, dareemaha indhaha, iyo isdhexgalka indhaha. Cabbirka resonator-ka wuxuu inta badan ku xiran yahay astaamaha walxaha iyo hirarka hawlgalka, tusaale ahaan, resonators-ka silicon ee ka shaqeeya xarigga infrared-ka ee u dhow badanaa waxay u baahan yihiin qaab-dhismeedyo muuqaal ah oo boqolaal nanometer ah iyo wixii ka sareeya ah. Sannadihii ugu dambeeyay, resonators-ka indhaha ee aadka u khafiifsan ee planar-ka ah ayaa soo jiitay dareen badan sababtoo ah codsiyadooda suurtagalka ah ee midabka qaab-dhismeedka, sawir-qaadista holographic, nidaaminta goobta iftiinka iyo aaladaha optoelectronic. Sida loo yareeyo dhumucda resonators-ka planar-ka waa mid ka mid ah dhibaatooyinka adag ee ay la kulmaan cilmi-baarayaashu.
Marka laga reebo walxaha semiconductor-ka dhaqameed, dahaarka topological-ka ee 3D (sida bismuth telluride, antimony telluride, bismuth selenide, iwm.) waa agab macluumaad cusub oo leh xaalado dusha sare ee birta oo si togan loo ilaaliyo iyo xaalado dahaarka. Xaaladda dusha sare waxaa ilaaliya isku-dhafka rogidda waqtiga, elektaroonadiisuna kuma kala firdhaan wasakhda aan magnetic-ga ahayn, taas oo leh rajooyin codsi oo muhiim ah oo ku saabsan xisaabinta quantum-ka ee awoodda yar iyo aaladaha spintronic. Isla mar ahaantaana, agabka dahaarka topological-ka ayaa sidoo kale muujinaya sifooyin muuqaal oo aad u fiican, sida tusmada refractive-ka sare, kuwa aan tooska ahayn ee waaweyn.indhahaisku-dhafka, kala duwanaanshaha baaxadda shaqada ee ballaaran, isbeddelka, is-dhexgalka fudud, iwm., kaas oo bixiya madal cusub oo loogu talagalay hirgelinta nidaaminta iftiinka iyoaaladaha elektiroonigga ah ee optoelectronic.
Koox cilmi-baaris ah oo ku sugan Shiinaha ayaa soo jeediyay hab lagu sameeyo resonators-ka indhaha ee aadka u khafiifsan iyagoo adeegsanaya nanofilms-ka insulator-ka ee bismuth telluride ee beera meelo badan oo beera. Godka indhaha wuxuu muujinayaa astaamo nuugis resonance ah oo muuqda oo ku yaal xarigga infrared-ka u dhow. Bismuth telluride wuxuu leeyahay tusmada refractive-ka oo aad u sarreysa oo ka badan 6 xarigga isgaarsiinta indhaha (ka sarreeya tusmada refractive-ka ee walxaha tusmada refractive-ka ee dhaqanka sida silicon iyo germanium), si dhumucda godka indhaha ay u gaarto hal-labaatan hirarka refractive-ka. Isla mar ahaantaana, resonator-ka indhaha waxaa lagu dhejiyaa kiristaalo photonic ah oo hal-cabbir ah, waxaana lagu arkay saameyn cusub oo hufnaan elektromagnetic ah oo ku jirta xarigga isgaarsiinta indhaha, taas oo ay ugu wacan tahay isku-xidhka resonator-ka iyo plasmon-ka Tamm iyo faragelintiisa burburka leh. Jawaabta muuqaalka ee saameyntani waxay ku xiran tahay dhumucda resonator-ka indhaha waxayna ku adag tahay isbeddelka tusmada refractive-ka ee deegaanka. Shaqadani waxay furaysaa hab cusub oo lagu xaqiijinayo godka indhaha ee aadka u khafiifsan, nidaaminta walxaha dahaarka ee topological iyo aaladaha optoelectronic.
Sida ku cad Jaantuska 1a iyo 1b, resonator-ka indhaha waxaa inta badan ka kooban yahay dahaarka sare ee bismuth telluride iyo nanofilms lacag ah. Nanofilms-ka bismuth telluride ee ay diyaarisay magnetron sputtering waxay leeyihiin bedka weyn iyo fidsanaan wanaagsan. Marka dhumucda filimada bismuth telluride iyo lacagta ay yihiin 42 nm iyo 30 nm, siday u kala horreeyaan, godka indhaha wuxuu muujiyaa nuugis resonance xooggan oo ku jirta xarigga 1100 ~ 1800 nm (Jaantuska 1c). Markii cilmi-baarayaashu ay godkan indhaha ku dareen kiristaal photonic ah oo laga sameeyay lakabyo is beddel ah oo Ta2O5 ah (182 nm) iyo SiO2 (260 nm) ah (Jaantuska 1e), dooxo nuugis oo gaar ah (Jaantuska 1f) ayaa ka soo muuqatay meel u dhow meesha ugu sarreysa ee nuugista resonant-ka asalka ah (~1550 nm), taas oo la mid ah saameynta daahfurnaanta elektromagnetic-ka ee ay soo saaraan nidaamyada atomka.

Walxaha bismuth telluride waxaa lagu gartaa mikroskoobka elektarooniga gudbinta iyo ellipsometry. Jaantuska 2a-2c wuxuu muujinayaa mikroskoobyada elektarooniga gudbinta (sawirrada xallinta sare leh) iyo qaababka kala-soocidda elektarooniga ee la xushay ee nanofilmyada bismuth telluride. Waxaa laga arki karaa sawirka in nanofilmyada bismuth telluride ee la diyaariyey ay yihiin walxo polycrystalline ah, jihada koritaanka ugu weynina waa (015) diyaaradda kiristaalka ah. Jaantuska 2d-2f wuxuu muujinayaa tusmada isku-dhafka ah ee refractive ee bismuth telluride oo lagu cabbiray ellipsometer iyo tusmada refractive ee ku habboon iyo xaaladda dusha sare ee isku-dhafka ah. Natiijooyinka waxay muujinayaan in isku-dhafka dabar-goynta ee xaaladda dusha sare uu ka weyn yahay tusmada refractive ee u dhaxaysa 230~1930 nm, taasoo muujinaysa astaamo u eg bir. Tusmada dhalaalka ee jirka ayaa ka badan 6 marka hirarka hirarka uu ka weyn yahay 1385 nm, kaas oo aad uga sarreeya kan silicon, germanium iyo agabyada kale ee tusmada dhalaalka sare leh ee dhaqanka ee ku jira kooxdan, kaas oo saldhig u ah diyaarinta resonators-ka indhaha ee aadka u khafiifsan. Cilmi-baarayaashu waxay tilmaamayaan in tani ay tahay markii ugu horreysay ee la soo sheego in la helo godka indhaha ee planar insulator-ka ee leh dhumucdiisuna tahay tobanaan nanomitir oo keliya oo ku jira qaybta isgaarsiinta indhaha. Dabadeed, spectrum-ka nuugista iyo hirarka resonance-ka ee godka indhaha ee aadka u khafiifsan ayaa lagu cabbiray dhumucda bismuth telluride. Ugu dambeyntii, saameynta dhumucda filimka lacagta ah ee ku saabsan spectra-ka daahfurnaanta elektaroonigga ah ee qaab-dhismeedka nanocavity/photonic crystal ayaa la baarayaa.

Iyadoo la diyaarinayo filimaan khafiif ah oo dhul ballaaran oo siman oo ah dahaarka sare ee bismuth telluride, iyo ka faa'iidaysiga tusmada refractive-ka aadka u sarreeya ee walxaha Bismuth telluride ee ku yaal xadka infrared-ka u dhow, god iftiin oo leh dhumucdiisuna tahay tobanaan nanomitir oo keliya ayaa la helaa. Godka indhaha ee aadka u khafiifsan wuxuu xaqiijin karaa nuugista iftiinka ee wax ku oolka ah ee ku jira xadka infrared-ka u dhow, wuxuuna leeyahay qiimo codsi oo muhiim ah oo ku saabsan horumarinta aaladaha optoelectronic ee ku jira xadka isgaarsiinta indhaha. Dhumucda godka indhaha ee bismuth telluride waa mid toosan oo u dhiganta hirarka resonant-ka, waana ka yar yahay kan godka indhaha ee la midka ah silicon iyo germanium. Isla mar ahaantaana, godka indhaha ee bismuth telluride waxaa lagu dhex daraa kiristaalka photonic si loo gaaro saameynta indhaha ee aan caadiga ahayn oo la mid ah hufnaanta elektromagnetic-ka ee nidaamka atomiga, taas oo bixisa hab cusub oo loogu talagalay nidaaminta muuqaalka ee qaab-dhismeedka microstructure. Daraasaddani waxay door gaar ah ka ciyaartaa kor u qaadista cilmi-baarista walxaha dahaarka sare ee ku jira nidaaminta iftiinka iyo aaladaha shaqada ee indhaha.