Lefatše le lecha lalisebelisoa tsa optoelectronic
Bafuputsi Setsing sa Theknoloji sa Technion-Israel ba thehile spin e laoloang ka bonngoelaser ea mahloe thehilweng hodima lera le le leng la athomo.Ho sibolloa hona ho ile ha khoneha ka tšebelisano e tsitsitseng e itšetlehileng ka spin pakeng tsa lera le le leng la athomo le lesela la photonic spin lattice, le ts'ehetsang phula e phahameng ea Q ka ho arola ha Rashaba-mofuta oa li-spin tsa li-photon tsa linaha tse tlanngoeng ka nako e tsoelang pele.
Sephetho, se phatlalalitsoeng ho Nature Materials mme se totobatsoa ka bokhutšoaane ba lipatlisiso, se bula tsela bakeng sa boithuto ba liketsahalo tse amanang le spin tse amanang le tsa khale le tsa khale.litsamaiso tsa quantum, 'me e bula mekhoa e mecha ea lipatlisiso tsa mantlha le ts'ebeliso ea elektrone le photon spin ka lisebelisoa tsa optoelectronic.Mohloli oa spin optical o kopanya mokhoa oa photon le phetoho ea elektronike, e fanang ka mokhoa oa ho ithuta phapanyetsano ea tlhahisoleseding ea spin pakeng tsa li-electrone le photons le ho hlahisa lisebelisoa tse tsoetseng pele tsa optoelectronic.
Spin valley optical microcavities li hahiloe ka ho kopanya li-photonic spin lattices tse nang le inversion asymmetry (sebaka se mosehla sa mantlha) le inversion symmetry (sebaka sa cyan cladding).
E le ho theha mehloli ena, ntho e hlokahalang ke ho felisa ho senyeha ha spin pakeng tsa linaha tse peli tse fapaneng tse fapaneng karolong ea photon kapa ea elektronike.Hangata sena se finyelloa ka ho sebelisa matla a khoheli tlas'a phello ea Faraday kapa Zeeman, le hoja mekhoa ena hangata e hloka matla a khoheli a matla 'me e ke ke ea hlahisa microsource.Mokhoa o mong o ts'episang o ipapisitse le sistimi ea kh'amera ea jiometri e sebelisang matla a maiketsetso a makenete ho hlahisa maemo a arohaneng a li-photon sebakeng se potlakileng.
Ka bomalimabe, litebello tsa nakong e fetileng tsa linaha tse arohaneng li itšetlehile haholo ka mekhoa ea phatlalatso ea maemo a tlase, e behang litšitiso tse mpe ho momahano oa sebaka le oa nakoana oa mehloli.Mokhoa ona o boetse o sitisoa ke sebopeho se laoloang ke spin-laser ea blocky laser-gain, e ke keng ea sebelisoa kapa e ke keng ea sebelisoa habonolo ho laola ka mafolofolo.mehloli e khanyang, haholo-holo ha ho se na matla a khoheli mochesong oa kamore.
E le ho finyella linaha tse phahameng tsa Q spin-splitting, bafuputsi ba ile ba haha li-lattice tsa photonic spin tse nang le li-symmetry tse fapaneng, ho kenyelletsa le mokokotlo o nang le inversion asymmetry le enfelopo ea symmetric inversion e kopantsoeng le lera le le leng la WS2, ho hlahisa liphula tse pota-potiloeng ka thōko.Thepa ea motheo ea asymmetric lattice e sebelisoang ke bafuputsi e na le lintho tse peli tsa bohlokoa.
The controllable spin-dependent reciprocal lattice vector e bakoang ke ho fapana ha sebaka sa geometric phase ea heterogeneous anisotropic nanoporous e entsoeng ka tsona.Vector ena e arola sehlopha sa degradation ea spin hore e be makala a mabeli a polarized sebakeng se matla, se tsejoang ka hore ke photonic Rushberg effect.
A para ea phahameng Q symmetric (quasi) bound states in the continuum, e leng ±K(Brillouin band Angle) photon spin liphula mathōkong a makala a spin a petsoha, a theha superposition e tsitsitseng ea amplitudes e lekanang.
Moprofesa Koren o hlokometse: “Re sebelisitse li-monolides tsa WS2 e le thepa ea ho fumana chelete hobane disulfide ena ea "band-gap transition metal disulfide" e na le "pseudo-spin" e ikhethang ea phula 'me e ithutoe haholo e le mokhoa o mong o tsamaisang tlhahisoleseling lielektrone tsa phula.Haholo-holo, ±K 'valley excitons (tse khanyang ka mokhoa oa planar spin-polarized dipole emitters) li ka thabisoa ka mokhoa o ikhethileng ke mabone a polarized ho latela melao ea khetho ea papiso ea phula, ka hona a laola ka mafolofolo ho potoloha ha matla a khoheli.mohloli oa mahlo.
Sebakeng se le seng se kopantsoeng sa spin valley microcavity, ±K 'valley excitons e kopantsoe le ±K spin Valley state ka polarization matching,' me spin exciton laser mocheso oa kamore e bonoa ka maikutlo a matla a leseli.Ka nako e tšoanang, thelasermochini o tsamaisa menyaka e ikemetseng ea ±K 'khohlong ho fumana boemo bo tlase ba tahlehelo ea sistimi le ho theha khokahano ea ho notlela ho ipapisitse le mokhahlelo oa jiometri khahlano le ±K spin phula.
Khokahano ea Phula e tsamaisoang ke mochini ona oa laser e felisa tlhoko ea khatello e tlase ea mocheso oa ho hasana ha nakoana.Ho feta moo, boemo bo fokolang ba tahlehelo ea laser ea Rashba monolayer bo ka fetoloa ka polarization ea pompo ea mola (e chitja), e fanang ka mokhoa oa ho laola matla a laser le momahano ea sebaka.
Moprofesa Hasman oa hlalosa: “Se senotsoengphotonicspin valley Rashba effect e fana ka mokhoa o akaretsang oa ho haha mehloli ea optical spin e holimo-emitting.Khokahano ea phula e bonts'itsoeng ka har'a sekhahla se le seng se kopantsoeng sa spin valley microcavity e re tlisa mohato o le mong haufi le ho fihlela tlhaiso-leseling ea bongata lipakeng tsa ±K 'phula ea phula ka li-qubits.
Ka nako e telele, sehlopha sa rona se ntse se etsa spin optics, se sebelisa photon spin e le sesebelisoa se sebetsang sa ho laola boitšoaro ba maqhubu a motlakase.Ka selemo sa 2018, re khahliloe ke phula ea pseudo-spin ka thepa ea mahlakore a mabeli, re ile ra qala morero oa nako e telele oa ho batlisisa taolo e sebetsang ea mehloli ea optical ea atomic-scale spin ka ho ba sieo ha matla a khoheli.Re sebelisa mohlala oa sekoli oa karolo e seng ea lehae ea Berry ho rarolla bothata ba ho fumana karolo e lumellanang ea jiometri ho tsoa ho exciton e le 'ngoe ea phula.
Leha ho le joalo, ka lebaka la ho haelloa ke mokhoa o matla oa ho lumellana pakeng tsa li-excitons, motheo o tsitsitseng o tsitsitseng oa li-multiple Valley excitons mohloling oa leseli o le mong oa Rashuba o finyelitsoeng o ntse o sa rarolloe.Bothata bona bo re susumelletsa ho nahana ka mohlala oa Rashuba oa li-photon tse phahameng tsa Q.Ka mor'a ho qapa mekhoa e mecha ea 'mele, re sebelisitse laser ea Rashuba single-layer laser e hlalositsoeng pampiring ena. "
Katleho ena e bula tsela bakeng sa boithuto ba liketsahalo tsa coherent spin correlation masimong a classical le quantum, mme e bula tsela e ncha bakeng sa lipatlisiso tsa mantlha le ts'ebeliso ea lisebelisoa tsa spintronic le photonic optoelectronic.
Nako ea poso: Mar-12-2024