Nyika itsva yezvigadzirwa zveoptoelectronic

Nyika itsva yeoptoelectronic zvishandiso

Vatsvagiri paTechnion-Israel Institute of Technology vakagadzira yakabatana inodzorwa spinoptical laserzvichibva pane imwechete atomic layer. Kuwanikwa uku kwakaitwa kuti kugoneke nekubatana kwakabatana-kunotenderera pakati peatomu imwe chete uye yakachinjika yakamisikidzwa photonic spin lattice, inotsigira yakakwirira-Q spin mupata kuburikidza neRashaba-mhando spin kupatsanurwa kwemafotoni enyika dzakasungwa mukuenderera mberi.
Mhedzisiro yacho, yakaburitswa muNature Materials uye yakajekeswa muchidimbu chetsvagiridzo, inovhura nzira yekudzidza yezvinopindirana spin-ane hukama zviitiko mukirasi uye.quantum systems, uye inovhura nzira nyowani dzekutsvagisa kwakakosha uye mashandisirwo erekitironi uye photon spin mune optoelectronic zvishandiso. Iyo spin optical sosi inosanganisa iyo photon modhi neiyo electron transition, iyo inopa nzira yekudzidza iyo spin yeruzivo kuchinjana pakati pemaerekitironi nemafotoni uye kugadzira epamusoro optoelectronic zvishandiso.

Spin valley optical microcavities inovakwa ne interfacing photonic spin lattices ine inversion asymmetry (yero core region) uye inversion symmetry (cyan cladding region).
Kuti uvake zvitubu izvi, chinodiwa ndechekubvisa spin degeneracy pakati penyika mbiri dzakapokana muphoton kana electron chikamu. Izvi zvinowanzoitwa kuburikidza nekushandisa magnetic field pasi peFaraday kana Zeeman effect, kunyange zvazvo nzira idzi dzinowanzoda simba remagineti uye haigoni kuburitsa microsource. Imwe nzira inovimbisa yakavakirwa pajeometric kamera system inoshandisa artificial magnetic field kugadzira spin-split state of photons munzvimbo ine simba.
Nehurombo, zvakambocherechedzwa zve spin kupatsanurwa nyika zvakatsamira zvakanyanya pane yakaderera-mass factor propagation modes, izvo zvinoisa zvipingaidzo zvakashata pakubatana kwenzvimbo uye kwenguva pfupi kwezvinyorwa. Iyi nzira inovhiringwawo ne spin-inodzorwa chimiro che blocky laser-kuwana zvinhu, izvo zvisingakwanisi kana zvisingagone kushandiswa zviri nyore kudzora zvine simba.magetsi, kunyanya mukushayikwa kwemagnetic fields pakupisa kwekamuri.
Kuti uwane yakakwirira-Q spin-splitting states, vatsvakurudzi vakagadzira photonic spin lattices ane symmetries yakasiyana, kusanganisira nheyo ine inversion asymmetry uye inversion symmetric envelope yakabatanidzwa neWS2 single layer, kuti ibudise mipata yakavharidzirwa. Iyo yakakosha inverse asymmetric lattice inoshandiswa nevaongorori ine zvinhu zviviri zvakakosha.
The controllable spin-dependent reciprocal lattice vector inokonzerwa ne geometric phase space kusiyana kwe heterogeneous anisotropic nanoporous inoumbwa nawo. Iyi vector inotsemura bhendi rekusvibisa bhendi kuita maviri spin-polarized matavi munzvimbo ine simba, inozivikanwa seiyo photonic Rushberg athari.
Mapaya epamusoro Q symmetric (quasi) akasungwa nyika mukuenderera mberi, zvinoti ±K(Brillouin band Angle) photon spin mipata pamucheto wemapazi anotsemuka anotsemuka, anoumba inobatana superposition yeakaenzana amplitudes.
Purofesa Koren akati: “Takashandisa WS2 monolides sechinhu chekuwana nekuti iyi direct band-gap transition metal disulfide ine mupata wakasarudzika wepseudo-spin uye yakaongororwa zvakanyanya seimwe nzira inotakura ruzivo mumaerekitironi emupata. Kunyanya, yavo ±K 'valley excitons (iyo inopenya muchimiro che planar spin-polarized dipole emitters) inogona kunakidzwa nekunakidzwa nerun-polarized mwenje zvichienderana nemipata yekufananidza mitemo yekusarudza, nekudaro kudzora nesimba remagineti isina kutenderera.optical source.
Mune imwe-layer yakasanganiswa spin valley microcavity, iyo ±K 'valley excitons yakabatanidzwa kune ±K spin mupata nyika nepolarization matching, uye iyo spin exciton laser pakupisa kwekamuri inoonekwa nemhinduro yakasimba. Panguva imwecheteyo, thelasermeshini inotyaira iyo yekutanga-yakazvimirira ±K 'valley excitons kuti iwane kushoma kurasikirwa mamiriro ehurongwa uye kumisazve yekuvhara-mukati kuwirirana kunoenderana nechikamu chejometri chakatarisana ne ±K spin mupata.
Kubatana kwemupata kunotungamirwa neiyi laser michina inobvisa kudiwa kwekudzikira tembiricha kudzvinyirirwa kwekupararira kwepakati. Uye zvakare, iyo yakaderera kurasikirwa mamiriro eRashba monolayer laser inogona kugadziridzwa nemutsara (denderedzwa) pombi polarization, iyo inopa nzira yekudzora kusimba kwelaser uye kubatana kwepakati. "
Purofesa Hasman anotsanangura kuti: “Zvakaziviswaphotonicspin mupata Rashba mhedzisiro inopa yakajairika nzira yekuvaka pamusoro-emitting spin optical masosi. Kubatana kwemupata kwakaratidzwa mune imwechete-layer yakasanganiswa spin valley microcavity inotiunzira nhanho imwe padyo nekuwana huwandu hweruzivo rwekupindirana pakati pe ± K 'valley excitons kuburikidza nequbits.
Kwenguva yakareba, timu yedu yanga ichigadzira spin optics, ichishandisa photon spin sechinhu chinoshanda chekudzora maitiro emagetsi emagetsi. Muna 2018, tichinakidzwa neiyo balley pseudo-spin mune maviri-dimensional zvinhu, takatanga chirongwa chenguva refu chekuongorora kushanda kwekutonga kweatomic-scale spin optical masosi mukusavapo kwemagineti. Isu tinoshandisa isiri-yemunharaunda Berry chikamu chikanganiso modhi kugadzirisa dambudziko rekuwana yakabatana geometric chikamu kubva kune imwechete bani exciton.
Nekudaro, nekuda kwekushaikwa kweiyo yakasimba synchronization mechanism pakati peexcitons, iyo yakakosha inobatana superposition yemultiple balley excitons muRashuba single-layer light source iyo yakaitwa inoramba isina kugadziriswa. Dambudziko iri rinotikurudzira kuti tifunge nezve Rashuba modhi yepamusoro Q photons. Mushure mekugadzira nzira itsva dzemuviri, takaita Rashuba single-layer laser inotsanangurwa mupepa rino. "
Kubudirira uku kunovhura nzira yekudzidza kwe coherent spin correlation phenomena mu classical uye quantum minda, uye inovhura nzira nyowani yekutsvagisa yekutanga uye kushandiswa kwe spintronic uye photonic optoelectronic zvishandiso.