Sehlopha sa puisano sa Optical, resonator ea mahlo e tšesaane haholo

Sehlopha sa puisano sa Optical, resonator ea mahlo e tšesaane haholo
Li-resonator tsa optical li ka beha maqhubu a khanyang a maqhubu sebakeng se lekanyelitsoeng, 'me li na le lits'ebetso tsa bohlokoa tšebelisanong ea leseli,puisano ea mahlo, optical sensing, le ho kopanya mahlo. Boholo ba resonator bo ipapisitse le litšoaneleho tsa thepa le bolelele ba maqhubu a ts'ebetso, mohlala, li-resonator tsa silicon tse sebetsang haufi le sehlopha sa infrared hangata li hloka meaho ea mahlo ea li-nanometer tse makholo ho ea holimo. Lilemong tsa morao tjena, li-ultra-thin planar optical resonator li hohetse tlhokomelo e kholo ka lebaka la ts'ebeliso ea tsona e ka bang teng ka 'mala oa sebopeho, litšoantšo tsa holographic, taolo ea masimo a bobebe 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 lisebelisoa tsa setso tsa semiconductor, li-insulators tsa 3D topological (joalo ka bismuth telluride, antimony telluride, bismuth selenide, joalo-joalo) ke lisebelisoa tse ncha tsa tlhahisoleseling tse nang le libaka tsa tšepe tse sirelelitsoeng ka holimo le linaha tsa insulator. Boemo bo ka holimo bo sirelelitsoe ke symmetry ea ho kheloha ha nako, 'me li-electrone tsa eona ha li hasane ke litšila tse seng tsa makenete, tse nang le menyetla ea bohlokoa ea ts'ebeliso ho lisebelisoa tse tlaase tsa quantum computing le spintronic. Ka nako e ts'oanang, lisebelisoa tsa insulator ea topological le tsona li bonts'a thepa e ntle ea mahlo, joalo ka index e phahameng ea refractive, e kholo e se nang moeli.ya mahlocoefficient, wide working spectrum range, tunability, bonolo ho kopanya, joalo-joalo, 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-ultra-thin optical resonator ka ho sebelisa sebaka se seholo se holisang bismuth telluride topological insulator nanofilms. Sebaka sa mahlo se bonts'a litšobotsi tse hlakileng tsa ho monya ha resonance haufi le sehlopha sa infrared. Bismuth telluride e na le index e phahameng haholo ea refractive ea ho feta 6 sehlopheng sa puisano sa optical (e phahameng ho feta index ea refractive ea lisebelisoa tsa setso tse phahameng tse kang silicon le germanium), e le hore botenya ba optical cavity bo fihle ho karolo ea mashome a mabeli a resonance. bolelele ba maqhubu. Ka nako e ts'oanang, resonator ea optical e behiloe holim'a kristale ea photonic e nang le mahlakoreng a le mong, 'me ho na le phello e hlakileng ea motlakase e hlahisoang ke motlakase ho sehlopha sa puisano sa optical, e leng ka lebaka la ho kopanngoa 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 ho fetola index ea ambient refractive. Mosebetsi ona o bula tsela e ncha bakeng sa ho phethahala ha ultrathin optical cavity, topological insulator material spectrum regulation le lisebelisoa tsa optoelectronic.
Joalokaha ho bontšitsoe ho FIG. 1a le 1b, resonator ea optical e entsoe haholo-holo ka bismuth telluride topological insulator le li-nanofilms tsa silevera. Li-nanofilms tsa bismuth telluride tse lokiselitsoeng ke magnetron sputtering li na le sebaka se seholo le flatness e ntle. Ha botenya ba bismuth telluride le lifilimi tsa silevera ke 42 nm le 30 nm, ka ho latellana, lehare la optical le bonts'a ho monya ho matla ha resonance sehlopheng sa 1100 ~ 1800 nm (Figure 1c). Ha bafuputsi ba kopanya sebaka sena sa mahlo holim'a kristale ea photonic e entsoeng ka mekotla e fapanyetsanang ea likarolo tsa Ta2O5 (182 nm) le SiO2 (260 nm) (Setšoantšo sa 1e), ho ile ha hlaha phula e ikhethang (Setšoantšo sa 1f) haufi le tlhoro ea pele ea ho monya ha resonant (~ 1550 nm), e ts'oanang le phello ea ponaletso ea motlakase e hlahisoang ke tsamaiso ea athomo.

Thepa ea bismuth telluride e ne e tšoauoa ka phetiso ea electron microscopy le ellipsometry. FEIE. 2a-2c e bonts'a li-micrographs tsa elektronike (litšoantšo tse phahameng) le mekhoa e khethiloeng ea elektronike e fapaneng ea bismuth telluride nanofilms. E ka bonoa ho tsoa setšoantšong hore nanofilms ea bismuth telluride e lokiselitsoeng ke lisebelisoa tsa polycrystalline, 'me mokhoa o moholo oa ho hōla ke (015) sefofane sa kristale. Setšoantšo sa 2d-2f se bonts'a index e rarahaneng ea refractive ea bismuth telluride e lekantsoeng ka ellipsometer le boemo ba boemo bo holimo le boemo bo rarahaneng ba naha. Liphetho li bonts'a hore coefficient ea ho timela ea boemo bo holimo e kholo ho feta index ea refractive ka har'a 230 ~ 1930 nm, e bonts'ang litšobotsi tse kang tsa tšepe. Lenane la refractive la 'mele le feta 6 ha leqhubu le le leholo ho feta 1385 nm, e leng e phahameng haholo ho feta ea silicon, germanium le lisebelisoa tse ling tsa setso tse phahameng-refractive index ea sehlopha sena, e leng se ralang motheo bakeng sa ho lokisoa ha ultra. - li-resonator tse tšesaane. Bafuputsi ba bontša hore ena ke tlaleho ea pele ea ho phethahala ha topological insulator planar optical cavity e nang le botenya ba mashome a li-nanometer feela sehlopheng sa puisano sa optical. Ka mor'a moo, maqhubu a ho monya le maqhubu a resonance a ultra-thin optical cavity li ile tsa lekanyetsoa ka botenya ba bismuth telluride. Qetellong, phello ea botenya ba filimi ea silevera ho ponaletso e hlahisitsoeng ke motlakase ho bismuth telluride nanocavity/photonic crystal structures e ea fuputsoa.

Ka ho lokisetsa sebaka se seholo se bataletseng lifilimi tse tšesaane tsa bismuth telluride topological insulators, le ho nka monyetla ka ultra-high refractive index ea Bismuth telluride thepa haufi le infrared band, ho na le sebaka sa planar optical cavity e nang le botenya ba li-nanometers tse mashome feela. The Ultra-thin optical cavity e ka lemoha ho monya ha leseli la resonant hantle ka har'a sehlopha se haufi sa infrared, 'me e na le boleng ba ts'ebeliso ea bohlokoa ho nts'etsopele ea lisebelisoa tsa optoelectronic sehlopheng sa puisano sa optical. Botenya ba bismuth telluride optical cavity bo tsamaisana le leqhubu la resonant wavelength, mme bo nyane ho feta ba silicon le germanium optical cavity. Ka nako e ts'oanang, bismuth telluride optical cavity e kopantsoe le photonic crystal ho finyella phello e sa tloaelehang ea optical e ts'oanang le ponaletso e hlahisoang ke motlakase ea tsamaiso ea athomo, e fanang ka mokhoa o mocha oa taolo ea spectrum ea microstructure. Boithuto bona bo na le karolo e itseng ho nts'etsapele lipatlisiso tsa lisebelisoa tsa topological insulator taolong e bobebe le lisebelisoa tse sebetsang tsa optical.