Ụwa ọhụrụ nke ngwaọrụ optoelectronic

Ụwa ọhụrụ nkengwaọrụ optoelectronic

Ndị na-eme nchọpụta na Technion-Israel Institute of Technology ewepụtala ọnyà a na-achịkwa nke ọmangwa anya laserdabere na otu oyi akwa atomic. Emere ka nchoputa a kwe omume site na mmekorita na-adabere n'okirikiri n'etiti otu oyi akwa atomic na ihe mgbochi photonic spin lattice nke na-akwado mgbada ndagwurugwu Q dị elu site na Rashaba-ụdị spin nkewa nke photons nke bound states na continuum.
Nsonaazụ a, nke e bipụtara na Nature Materials ma pụta ìhè na nkenke nyocha ya, na-emeghe ụzọ maka ọmụmụ ihe nhụsianya na-ejikọta ọnụ na oge ochie na oge ochie.usoro nke quantum, ma mepee ụzọ ọhụrụ maka nyocha dị mkpa na ngwa nke eletrọn na foton spin na ngwaọrụ optoelectronic. Isi iyi anya ntugharị na-ejikọta ọnọdụ foton na mgbanwe elektrọn, nke na-enye usoro maka ịmụ mgbanwe mgbanwe ozi n'etiti electrons na photon na ịmepụta ngwaọrụ optoelectronic dị elu.

A na-ewu microcavities ngwa anya nke Spin Valley site na ijikọ ọnụ ahịa fotonic spin lattices nwere asymmetry inversion (mpaghara isi edo edo) na ngbanwe ntụgharị (mpaghara cyan cladding).
Iji wuo isi mmalite ndị a, ihe a ga-achọrịrị bụ ikpochapụ nbibi n'etiti steeti abụọ na-emegiderịta onwe ya na akụkụ foton ma ọ bụ elektrọn. A na-enwetakarị nke a site n'itinye oghere ndọta n'okpuru mmetụta Faraday ma ọ bụ Zeeman, n'agbanyeghị na ụzọ ndị a na-achọkarị oghere magnetik na enweghị ike ịmepụta microsource. Ụzọ ọzọ na-ekwe nkwa dabere na sistemu igwefoto geometric nke na-eji oghere magnetik arụpụta iji mepụta steeti foton gbawara agbawa n'obere oghere.
N'ụzọ dị mwute, nlebanya gara aga nke steeti ndị kewara agbawa adaberewo n'ụzọ dị ala na-agbasa, bụ nke na-etinye ihe mgbochi dị njọ na ngbanwe oghere na nwa oge nke isi mmalite. Usoro a na-egbochikwa usoro a site n'ụdị nchịkwa nke ihe eji emepụta laser blocky, nke enweghị ike iji ma ọ bụ enweghị ike iji ya mee ihe n'ụzọ dị mfe.isi mmalite ọkụ, karịsịa na enweghị oghere magnetik na ụlọ okpomọkụ.
Iji nweta steeti ndị na-agbawa elu-Q dị elu, ndị nyocha ahụ rụpụtara lattices nke fotonic nwere akara ngosi dị iche iche, gụnyere isi nwere asymmetry inversion yana envelopu symmetric inversion jikọtara ya na otu oyi akwa WS2, iji mepụta ndagwurugwu ntugharị n'akụkụ. Isi ihe dị iche iche asymmetric lattice nke ndị nyocha na-eji nwere ihe abụọ dị mkpa.
vector nke na-adabere na ntugharị nke nwere ike ịchịkwa bụ nke ngbanwe oghere akụkụ geometric nke nanoporous anisotropic dị iche iche mejupụtara ha. Nke a vector na-ekewa eriri mbelata ọkpụkpụ n'ime alaka abụọ na-agbagharị agbagharị na oghere ọkụ, nke a maara dị ka mmetụta photonic Rushberg.
Otu ụzọ Q symmetric (quasi) dị elu na-ekwu na continuum, ya bụ ±K(Brillouin band Angle) photon spin valleys na nsọtụ nke alaka na-ekesa, na-etolite nnukwu ọnọdụ nke nha nha nhata.
Prọfesọ Koren kwuru, sị: “Anyị ji WS2 monolides dị ka ihe na-enweta n'ihi na nke a kpọmkwem band-gap mgbanwe metal disulfide nwere pụrụ iche ndagwurugwu pseudo-spin na a mụọ nke ukwuu dị ka ihe ọzọ ozi na-ebu na ndagwurugwu electrons. Kpọmkwem, ± K 'valley excitons (nke na-egbuke egbuke n'ụdị planar spin-polarized dipole emitters) nwere ike ịhọrọ nke ọma site na ọkụ na-atụgharị ya dị ka iwu ntụle ntụle si dị, si otú a na-arụsi ọrụ ike na-achịkwa ntụgharị nke magnetically free.ngwa anya isi iyi.
N'ime microcavity agbakwunyere otu oyi akwa, ± K 'valley excitons jikọtara ya na ± K spin valley state site na matching polarization, na spin exciton laser na ụlọ okpomọkụ na-enweta site na nzaghachi ọkụ siri ike. N'otu oge ahụ, ndịlaserUsoro na-eme ka ± K 'valley excitons nke mbụ nweere onwe ya ịchọta ọnọdụ mfu kacha nta nke sistemụ ahụ wee maliteghachi njikọ mkpọchi dabere na usoro geometric chere ihu na ndagwurugwu ± K.
Nkwekọrịta Ndagwurugwu nke usoro laser a na-akwalite na-ewepụ mkpa ọ dị mkpa nkwụsị okpomọkụ dị ala nke mgbasasị oge. Na mgbakwunye, enwere ike gbanwee ọnọdụ mfu kacha nta nke Rashba monolayer laser site na linear (circular) pump polarization, nke na-enye ụzọ iji chịkwaa ike laser na ịdị n'otu oghere.
Prọfesọ Hasman na-akọwa, sị: “E kpugherephotonicntụ ntụ ndagwurugwu Rashba mmetụta na-enye usoro n'ozuzu maka ịrụpụta isi iyi anya na-agbapụta elu. Nkwekọrịta Ndagwurugwu egosiri na obere oghere na-ejikọta ọnụ na-eme ka anyị nwee otu nzọụkwụ nso n'inweta mkpokọta ozi n'etiti ± K 'valley excitons via qubits.
Ruo ogologo oge, ndị otu anyị na-etolite spin optics, na-eji photon spin dị ka ngwá ọrụ dị irè maka ịchịkwa omume nke ebili mmiri electromagnetic. N'afọ 2018, nke nwere mmasị na ndagwurugwu pseudo-spin na ihe akụkụ abụọ, anyị malitere ọrụ ogologo oge iji nyochaa njikwa arụ ọrụ nke isi mmalite ihe ntanetị n'ọkwa na-enweghị oghere magnetik. Anyị na-eji ụdị ntụpọ ntụpọ Berry na-abụghị nke mpaghara iji dozie nsogbu nke ịnweta usoro geometric na-ejikọta ọnụ site na otu exciton Valley.
Otú ọ dị, n'ihi enweghị usoro mmekọrịta siri ike n'etiti excitons, isi ihe na-arụkọ ọrụ ọnụ nke otutu ndagwurugwu dị na Rashuba otu-layer ìhè ọkụ nke enwetara ka edozibeghị. Nsogbu a na-akpali anyị iche echiche banyere ụdị Rashuba nke elu Q photons. Ka anyị mepechara ụzọ anụ ahụ ọhụrụ, anyị etinyela laser otu oyi akwa nke Rashuba kọwara n'akwụkwọ a.
Mmezu nke a na-emepe ụzọ maka ọmụmụ ihe na-emekọrịta ihe n'otu oge n'ụdị oge gboo na nke quantum, wee mepee ụzọ ọhụrụ maka nyocha na ojiji nke spintronic na photonic optoelectronic ngwaọrụ.