Ihlabathi elitsha lezixhobo ze-optoelectronic

Ihlabathi elitsha leizixhobo ze-optoelectronic

Abaphandi kwi-Technion-Israel Institute of Technology baye baphuhlisa i-spin elawulwa ngokuhambelanayolaser opticalisekelwe kumaleko athom enye. Oku kufunyaniswayo kwenziwa kube nokwenzeka ngonxibelelwano oluhambelanayo oluxhomekeke kwi-spin phakathi komaleko we-athomu enye kunye ne-horizontally contrained photonic spin lattice, exhasa i-high-Q spin intlambo ngokusebenzisa i-Rashaba-uhlobo lwe-spin yokuqhekeka kweefotoni zamazwe abophekileyo kwi-continuum.
Isiphumo, esipapashwe kwiMathiriyeli yeNdalo kwaye igxininiswe kwingcaciso emfutshane yophando, ivula indlela yokufunda yeziganeko ezihambelanayo ezinxulumene ne-spin kwi-classical andiinkqubo zequantum, kwaye ivula iindlela ezintsha zophando olusisiseko kunye nokusetyenziswa kwe-electron kunye ne-photon spin kwizixhobo ze-optoelectronic. Umthombo we-spin optical udibanisa imowudi yefoto kunye nenguqu ye-electron, ebonelela ngendlela yokufunda ukutshintshiselana kolwazi lwe-spin phakathi kwee-electron kunye neefotoni kunye nokuphuhlisa izixhobo eziphezulu ze-optoelectronic.

I-spin valley optical microcavities yakhiwe ngokudibanisa i-photonic spin lattices kunye ne-inversion asymmetry (ummandla ongundoqo otyheli) kunye ne-inversion symmetry (ummandla we-cyan cladding).
Ukuze kwakhiwe le mithombo, imfuno efunekayo kukuphelisa ukuwohloka kwe-spin phakathi kwamazwe amabini achaseneyo kwi-photon okanye inxalenye ye-electron. Oku kudla ngokufezekiswa ngokusebenzisa i-magnetic field phantsi kweFaraday okanye i-Zeeman effect, nangona ezi ndlela zihlala zifuna indawo enamandla yamagnetic kwaye ayikwazi ukuvelisa i-microsource. Enye indlela ethembisayo isekwe kwinkqubo yekhamera yejiyometri esebenzisa imagnethi eyenziweyo ukuvelisa iimeko zokwahlulwahlulwa kweefotoni kwindawo ekhawulezayo.
Ngelishwa, imigqaliselo yangaphambili ye-spin yamazwe ahlukeneyo ixhomekeke kakhulu kwiindlela zokusasaza izinto ezinobunzima obuphantsi, ezibeka imiqobo engathandekiyo kwintsebenziswano yendawo kunye neyexeshana yemithombo. Le ndlela iphinda ithintelwe yindalo elawulwa yi-spin ye-blocky laser-gain materials, engenako okanye engenakusetyenziswa ngokulula ukulawula ngokusebenzayo.imithombo yokukhanya, ngakumbi ngokungabikho kwamagnetic fields kwiqondo lokushisa.
Ukufezekisa i-high-Q spin-splitting states, abaphandi bakha i-photonic spin lattices kunye ne-symmetries eyahlukeneyo, kubandakanywa i-core ne-asymmetry ye-inversion kunye ne-inversion symmetric imvulophu edibeneyo kunye ne-WS2 eyodwa, ukuvelisa i-lateral contrained valleys. I-lattice esisiseko ye-asymmetric esisiseko esetyenziswa ngabaphandi ineempawu ezimbini ezibalulekileyo.
Ivektha yelattice elawulekayo exhomekeke kwi-reciprocal ebangelwa kukwahluka kwesithuba sesigaba sejometri ye-heterogeneous anisotropic nanoporous eyenziwe ngabo. Le vektha yahlula ibhendi yokuthotywa kwespin ibe ngamasebe amabini ajikelezileyo kwisithuba esinamandla, aziwa ngokuba yi-photonic Rushberg effect.
Izibini eziphakamileyo ze-Q symmetric (quasi) ezibophekileyo kwi-continuum, ezizezi ±K (i-Brillouin band Angle) i-photon spin valleys ekupheleni kwamasebe aqhekezayo, yenze i-superposition ehambelanayo ye-amplitudes elinganayo.
Unjingalwazi uKoren uthe: “Sisebenzise i-WS2 monolides njengesixhobo sokuzuza kuba le ntsimbi ye-disulfide ye-band-gap ine-valley ekhethekileyo ye-pseudo-spin kwaye iye yaphononongwa ngokubanzi njengenye indlela yokuthwala ulwazi kwii-electron zentlambo. Ngokukodwa, i-±K 'intlambo ye-excitons (egqabhuka ngohlobo lweplani ye-dipoles-polarized dipole emitters) inokonwaba ngokukhethekayo ngokukhanya okujikelezayo ngokwemigaqo yokuthelekisa intlambo, ngaloo ndlela ilawula ngenkuthalo i-spin engenamagnethi.umthombo obonakalayo.
Kumaleko omnye odityanisiweyo we-spin valley microcavity, i-±K 'intlambo excitons idityaniswe ne-±K spin intlambo yelizwe ngokuthelekisana nepolarization, kunye ne-spin exciton laser kwiqondo lobushushu begumbi ibonwa ngempendulo yokukhanya okunamandla. Kwangaxeshanye, ilaserisixhobo siqhuba i-excitons yentlambo ezimeleyo yesigaba sokuqala ±K ukufumana ubuncinci bemeko yelahleko yesixokelelwano kunye nokuseka kwakhona ulungelelwaniso lokutshixa olusekwe kwisigaba sejiyometri esichasene nentlambo ye-±K spin.
Ukuhambelana kwe-Valley eqhutywa yile ndlela ye-laser kuphelisa imfuno yokunciphisa ubushushu obuphantsi bokusasazeka okuphakathi. Ukongeza, ubuncinci belahleko ye-laser ye-Rashba monolayer inokuguqulwa nge-linear (circular) pump polarization, ebonelela ngendlela yokulawula ubunzulu be-laser kunye nokuhambelana kwendawo. "
UNjingalwazi uHasman uyacacisa: “Okutyhiliweyophotonicspin intlambo Rashba isiphumo inikeza indlela jikelele yokwakha umphezulu-emitting spin imithombo optical. Ukuhambelana kwentlambo okubonakaliswe kuluhlu olunye oludityanisiweyo lwe-spin valley microcavity kusizisa inyathelo elinye kufutshane ekufezekiseni ulwazi lomyinge wokuphonswa kolwazi phakathi kwe-±K 'kwintlambo ye-excitons ngokusebenzisa i-qubits.
Ixesha elide, iqela lethu liphuhlisa i-spin optics, isebenzisa i-photon spin njengesixhobo esisebenzayo sokulawula ukuziphatha kwamaza ombane. Ngo-2018, sichukunyiswe yintlambo ye-pseudo-spin kwizinto ezinobubanzi obumbini, saqala iprojekthi yexesha elide ukuphanda ulawulo olusebenzayo lwemithombo ye-atomic-scale spin optical ngokungabikho kwamagnetic fields. Sisebenzisa imodeli engeyiyo yendawo ye-Berry isigaba sesiphene ukusombulula ingxaki yokufumana isigaba sejometri esihambelanayo kwi-exciton enye yentlambo.
Nangona kunjalo, ngenxa yokungabikho kwendlela eyomeleleyo yongqamaniso phakathi kwe-excitons, i-superposition esisiseko ehambelanayo ye-multiple valley excitons kwi-Rashuba yomthombo wokukhanya owodwa oye waphunyezwa uhlala ungasonjululwa. Le ngxaki isikhuthaza ukuba sicinge ngemodeli yeRashuba yeefoton eziphezulu ze-Q. Emva kokuqulunqa iindlela ezintsha zomzimba, siphumeze iRashuba-layer-layer laser echazwe kweli phepha.
Le mpumelelo ivula indlela yokufunda yeziganeko ezihambelanayo ze-spin correlation kwi-classical kunye ne-quantum fields, kwaye ivula indlela entsha yophando olusisiseko kunye nokusetyenziswa kwezixhobo ze-spitronic kunye ne-photonic optoelectronic.