Lebanta la puisano la mahlo, resonator e tšesaane haholo ea mahlo

Lebanta la puisano la mahlo, resonator e tšesaane haholo ea mahlo
Li-resonator tsa mahlo li ka fumana maqhubu a itseng a maqhubu a leseli sebakeng se lekanyelitsoeng, 'me li na le lits'ebetso tsa bohlokoa tšebelisanong ea leseli le matter,puisano ea mahlo, kutlo ea mahlo, le kopanyo ea mahlo. Boholo ba resonator bo itšetlehile haholo-holo ka litšobotsi tsa thepa le bolelele ba maqhubu a ts'ebetso, mohlala, li-resonator tsa silicon tse sebetsang sehlopheng se haufi sa infrared hangata li hloka meaho ea mahlo ea li-nanometer tse makholo le ho feta. Lilemong tsa morao tjena, li-resonator tsa mahlo tse tšesaane haholo li hohetse tlhokomelo e kholo ka lebaka la ts'ebeliso ea tsona e ka bang teng 'mala oa sebopeho, litšoantšo tsa holographic, taolo ea tšimo ea leseli le lisebelisoa tsa optoelectronic. Mokhoa oa ho fokotsa botenya ba li-resonator tsa planar ke e 'ngoe ea mathata a thata ao bafuputsi ba tobaneng le 'ona.
Ho fapana le thepa ea setso ea semiconductor, li-insulator tsa topological tsa 3D (tse kang bismuth telluride, antimony telluride, bismuth selenide, jj.) ke thepa e ncha ea tlhahisoleseling e nang le maemo a holimo a tšepe a sirelelitsoeng ka topological le maemo a insulator. Boemo ba bokaholimo bo sirelelitsoe ke ho leka-lekana ha ho fetoha ha nako, 'me lielektrone tsa eona ha li hasane ke litšila tse seng tsa makenete, tse nang le menyetla ea bohlokoa ea ts'ebeliso ho likhomphutha tsa quantum tse nang le matla a tlase le lisebelisoa tsa spintronic. Ka nako e ts'oanang, thepa ea insulator ea topological le eona e bonts'a thepa e ntle ea optical, joalo ka index e phahameng ea refractive, e kholo e seng mola.leselicoefficient, mefuta e mengata ea spectrum e sebetsang, tokiso, kopanyo e bonolo, jj., e fanang ka sethala se secha sa ho phethahatsa taolo ea leseli lelisebelisoa tsa optoelectronic.
Sehlopha sa bafuputsi Chaena se hlahisitse mokhoa oa ho etsa li-resonator tsa optical tse tšesaane haholo ka ho sebelisa li-nanofilms tsa topological insulator tsa bismuth telluride tse holang sebakeng se seholo. Lesoba la optical le bontša litšobotsi tse totobetseng tsa ho monya resonance ka har'a sehlopha se haufi le infrared. Bismuth telluride e na le index e phahameng haholo ea refractive ea ho feta 6 sehlopheng sa puisano ea optical (e phahameng ho feta index ea refractive ea thepa ea setso ea refractive index e phahameng joalo ka silicon le germanium), e le hore botenya ba lesoba la optical bo ka fihla ho mashome a mabeli a bolelele ba leqhubu la resonance. Ka nako e ts'oanang, resonator ea optical e behiloe holim'a kristale ea photonic ea tekanyo e le 'ngoe, 'me phello e ncha ea ponaletso e bakoang ke motlakase e bonoa sehlopheng sa puisano ea optical, e leng se bakoang ke ho kopana ha resonator le plasmon ea Tamm le tšitiso ea eona e senyang. Karabelo ea spectral ea phello ena e itšetlehile ka botenya ba resonator ea optical 'me e matla phetohong ea index ea refractive e potolohileng. Mosebetsi ona o bula tsela e ncha ea ho phethahatsa lesoba la optical le tšesaane haholo, taolo ea spectrum ea thepa ea topological insulator le lisebelisoa tsa optoelectronic.
Jwalo ka ha ho bontshitswe ho Setšoantšo sa 1a le sa 1b, resonator ya optical e bopilwe haholo-holo ka insulator ya topological ya bismuth telluride le nanofilms tsa silevera. Nanofilms tsa bismuth telluride tse lokisitsweng ke magnetron sputtering di na le sebaka se seholo le ho ba bataletse hantle. Ha botenya ba difilimi tsa bismuth telluride le tsa silevera e le 42 nm le 30 nm, ka ho latellana, cavity ya optical e bontsha ho monya ho matla ha resonance sehlopheng sa 1100 ~ 1800 nm (Setshwantsho sa 1c). Ha bafuputsi ba kopanya cavity ena ya optical hodima kristale ya photonic e entsweng ka di-stack tse fapanyetsanang tsa Ta2O5 (182 nm) le SiO2 (260 nm) layers (Setshwantsho sa 1e), phula e ikgethang ya ho monya (Setshwantsho sa 1f) e hlahile haufi le tlhoro ya pele ya ho monya resonant (~1550 nm), e tshwanang le phello ya ponaletso e bakwang ke motlakase e hlahiswang ke ditsamaiso tsa athomo.

Thepa ea bismuth telluride e ne e khetholloa ka microscopy ea elektrone ea phetisetso le ellipsometry. Setšoantšo sa 2a-2c se bontša li-micrograph tsa elektrone ea phetisetso (litšoantšo tse nang le qeto e phahameng) le mekhoa e khethiloeng ea diffraction ea elektrone ea nanofilms tsa bismuth telluride. Ho ka bonoa setšoantšong hore li-nanofilms tsa bismuth telluride tse lokisitsoeng ke thepa ea polycrystalline, 'me tataiso e kholo ea kholo ke (015) kristale plane. Setšoantšo sa 2d-2f se bontša index e rarahaneng ea refractive ea bismuth telluride e lekantsoeng ka ellipsometer le index ea refractive ea boemo ba holim'a metsi le boemo bo kopaneng. Liphetho li bontša hore coefficient ea ho fela ha boemo ba holim'a metsi e kholo ho feta index ea refractive e pakeng tsa 230 ~ 1930 nm, e bontšang litšobotsi tse kang tsa tšepe. Index ea refractive ea 'mele e feta 6 ha bolelele ba leqhubu bo feta 1385 nm, e leng se phahameng haholo ho feta sa silicon, germanium le lisebelisoa tse ling tsa setso tsa index tse phahameng tse nang le refractive sehlopheng sena, e leng motheo oa ho lokisetsa li-resonator tse tšesaane haholo tsa optical. Bafuputsi ba supa hore ena ke ketsahalo ea pele e tlalehiloeng ea cavity ea planar optical cavity e nang le botenya ba li-nanometer tse mashome feela sehlopheng sa puisano ea optical. Ka mor'a moo, spectrum ea absorption le wavelength ea resonance ea cavity ea optical e tšesaane haholo li ile tsa lekanngoa ka botenya ba bismuth telluride. Qetellong, phello ea botenya ba filimi ea silevera holim'a li-spectra tse pepeneneng tse hlahisoang ke motlakase mehahong ea kristale ea bismuth telluride nanocavity/photonic ea hlahlojoa.

Ka ho lokisa difilimi tse tshesane tse bataletseng tsa di-insulator tsa topological tsa bismuth telluride, le ho sebedisa monyetla wa index e phahameng haholo ya refractive ya thepa ya Bismuth telluride ka hara sehlopha sa infrared se haufi, ho fumanwa sebaka se bataletseng sa optical se nang le botenya ba di-nanometer tse mashome feela. Sebaka se bataletseng haholo sa optical se ka fihlella ho monngwa ha lesedi le hlabang ka katleho sehlopheng sa infrared se haufi, mme se na le boleng ba bohlokwa ba tshebediso ntshetsopeleng ya disebediswa tsa optoelectronic sehlopheng sa puisano sa optical. Botenya ba sebaka se bataletseng sa optical sa bismuth telluride bo hokahane le bolelele ba leqhubu la resonant, mme bo bonyenyane ho feta ba sebaka se tshwanang sa silicon le germanium optical. Ka nako e ts'oanang, sebaka se bataletseng sa optical sa bismuth telluride se kopantswe le kristale ya photonic ho fihlella phello e sa tlwaelehang ya optical e tshwanang le ponaletso e bakwang ke motlakase ya sistimi ya athomo, e fanang ka mokgwa o motjha wa taolo ya sebopeho sa microstructure. Thuto ena e bapala karolo e itseng ho ntshetseng pele dipatlisiso tsa thepa ya insulator ya topological taolong ya lesedi le disebediswa tse sebetsang tsa optical.