He ao hou ongā taputapu optoelectronic
Kua whakawhanakehia e ngā kairangahau i te Technion-Israel Institute of Technology tētahi hurihanga e whakahaeretia ana kia ōrite te āhuarēseri whatui runga i te paparanga ngota kotahi. I taea tēnei kitenga nā te taunekeneke takahuri-hurihuri i waenganui i te paparanga ngota kotahi me te whatunga takahuri photonic whakapae-here, e tautoko ana i te awaawa takahuri Q-teitei mā te wehewehenga takahuri momo-Rashaba o ngā photon o ngā āhua here i roto i te haere tonu.
Ko te hua, i whakaputaina ki roto i te Nature Materials, ā, i whakamāramahia i roto i tana pukapuka rangahau poto, e whakatakoto ana i te ara mō te ako i ngā āhuatanga e pā ana ki te takahurihuri i roto i ngā mahi tawhito me ngā mahi pūtaiao tawhito.ngā pūnaha irahiko, ā, ka whakatuwhera i ngā huarahi hou mō ngā rangahau taketake me ngā tono o te takahuri irahiko me te photon i roto i ngā taputapu optoelectronic. Ka whakakotahi te pūtake whatu takahuri i te aratau photon me te whakawhiti irahiko, e whakarato ana i tētahi tikanga mō te ako i te whakawhitiwhiti kōrero takahuri i waenga i ngā irahiko me ngā photon me te whakawhanake i ngā taputapu optoelectronic matatau.
Ka hangaia ngā kōhao moroiti whatu o te spin valley mā te hono i ngā whatunga photonic spin me te inversion asymmetry (rohe matua kōwhai) me te inversion asymmetry (rohe whakakikorua cyan).
Hei hanga i ēnei pūtake, ko te mea nui ko te whakakore i te hekenga o te takahurihuri i waenga i ngā āhua takahurihuri e rua i roto i te wāhanga photon, i te wāhanga irahiko rānei. Ka tutukihia tēnei mā te whakamahi i tētahi papa aukume i raro i te pānga Faraday, Zeeman rānei, ahakoa he tikanga e hiahiatia ana he papa aukume kaha mō ēnei tikanga, ā, kāore e taea te whakaputa i tētahi pūtake moroiti. Ko tētahi atu huarahi whai hua ko te pūnaha kāmera āhuahanga e whakamahi ana i tētahi papa aukume horihori hei whakaputa i ngā āhua takahurihuri-wehewehe o ngā photon i roto i te wāhi nekehanga.
Engari, ko ngā kitenga o mua mō ngā āhua wehewehenga hurihuri i whakawhirinaki nui ki ngā momo horapa tauwehe iti-papatipu, e whakatakoto ana i ngā here kino ki te hononga ā-wāhi me te wā o ngā pūtake. Ka āraihia hoki tēnei huarahi e te āhua hurihuri-whakahaere o ngā rauemi poraka-whakawhiwhi laser, e kore e taea, e kore rānei e taea te whakamahi ngāwari ki te whakahaere kaha.ngā pūtake mārama, inā koa i te korenga o ngā āpure aukume i te pāmahana rūma.
Hei whakatutuki i ngā āhua wehewehe-hurihuri Q-teitei, i hangaia e ngā kairangahau ngā whatunga hurihuri photonic me ngā taurite rerekē, tae atu ki te matua me te kore taurite hurihuri me te kōpaki taurite hurihuri kua whakauruhia ki te paparanga kotahi WS2, hei whakaputa i ngā awaawa hurihuri here taha. E rua ngā āhuatanga nui o te whatunga kore taurite hurihuri taketake e whakamahia ana e ngā kairangahau.
Ko te wekere whatu tauutuutu e whakawhirinaki ana ki te takahuri ka taea te whakahaere, i puta mai i te rerekētanga o te wāhi ā-ira o te nanoporous anisotropic heterogeneous i titoa mai i a rātou. Ka wehea e tēnei wekere te roopu whakaheke takahuri kia rua ngā peka porowhita-polarized i roto i te wāhi nekehanga, e mōhiotia ana ko te pānga photonic Rushberg.
Ka hangaia e te takirua o ngā āhua Q ōrite teitei (āhua here) i roto i te haere tonu, arā, ko ngā awaawa takahuri photon ±K (Koki roopu Brillouin) i te taha o ngā manga wehewehe takahuri, he taupatupatu ōrite o ngā kaha ōrite.
I kī a Ahorangi Koren: "I whakamahia e mātou ngā monolides WS2 hei rauemi whakanui nā te mea he pseudo-spin awaawa ahurei tō tēnei disulfide whakarewa whakawhiti āputa-rohe tika, ā, kua rangahauhia whānuitia hei kaikawe mōhiohio rerekē i roto i ngā irahiko awaawa. Ina koa, ko ā rātou ±K 'awaawa excitons (e whiti ana i roto i te ahua o ngā dipole emitters porowhita-polarized planar) ka taea te whakaoho whiriwhiri e te mārama porowhita-polarized e ai ki ngā ture whiriwhiri whakataurite awaawa, kia kaha ai te whakahaere i te porowhita kore utu aukume."pūtake whatu.
I roto i tētahi kōhao iti o te awaawa hurihuri kotahi-paparanga kua whakauruhia, ka honoa ngā whakaoho awaawa ±K 'ki te āhua awaawa hurihuri ±K mā te taurite polarization, ā, ka tutuki te taiaho whakaoho hurihuri i te pāmahana rūma mā te urupare mārama kaha. I taua wā anō, ko terēseriKa akiakihia e te tikanga ngā whakaoho o te awaawa ±K 'kāore e tū motuhake i te wāhanga tuatahi kia kitea ai te āhua ngaronga iti rawa o te pūnaha me te whakatū anō i te hononga maukati i runga i te wāhanga āhuahanga kei te ritenga atu o te awaawa takahuri ±K.
Mā te hononga ā-awaawa e ārahihia ana e tēnei tikanga taiaho ka kore e hiahiatia te pehi i te pāmahana iti o te marara ā-wā. Hei tāpiri, ka taea te whakarerekē i te āhua ngaronga iti rawa o te taiaho papa kotahi Rashba mā te polarization papu raina (porowhita), e whakarato ana i tētahi huarahi ki te whakahaere i te kaha o te taiaho me te hononga ā-wāhi.
E whakamārama ana a Ahorangi Hasman: "Ko ngā mea i whakakiteawhakaahuaKo te pānga o te awaawa hurihuri o Rashba e whakarato ana i tētahi tikanga whānui mō te hanga i ngā pūtake whatu hurihuri e whakaputa ana i te mata. Ko te ōritetanga o te awaawa e whakaatuhia ana i roto i tētahi kōhao iti o te awaawa hurihuri kotahi-paparanga kua whakauruhia, ka whakatata atu tātou ki te whakatutuki i te hononga mōhiohio matū i waenga i ngā whakaoho awaawa ±K 'mā roto i ngā qubit.
Mō te wā roa, kua roa tā mātou tīma e whakawhanake ana i ngā whatu hurihuri, mā te whakamahi i te hurihuri photon hei taputapu whai hua mō te whakahaere i te whanonga o ngā ngaru hikohiko. I te tau 2018, i te mea he mea whakamīharo ki te hurihuri rūpahu o te awaawa i roto i ngā rauemi rua-ahu, ka tīmata mātou i tētahi kaupapa roa hei tirotiro i te whakahaere kaha o ngā pūtake whatu hurihuri tauine-atomika i te korenga o ngā mara aukume. Ka whakamahia e mātou te tauira hapa āhua Berry kore-rohe hei whakaoti rapanga o te whiwhi āhua āhuahanga ōrite mai i tētahi exciton awaawa kotahi.
Heoi, nā te korenga o tētahi tikanga tukutahi kaha i waenga i ngā excitons, kāore anō kia whakatauhia te tūhonohonotanga taketake o ngā excitons awaawa maha i roto i te pūtake mārama papa-kotahi o Rashuba kua tutuki. E whakaoho ana tēnei raruraru i a mātou ki te whakaaro ki te tauira Rashuba o ngā photons Q teitei. Whai muri i te auahatanga o ngā tikanga ā-tinana hou, kua whakatinanahia e mātou te laser papa-kotahi o Rashuba kua whakaahuatia i roto i tēnei pepa.”
Mā tēnei whakatutukitanga ka tuwhera te ara mō te ako i ngā āhuatanga taunga hurihuri piripono i roto i ngā mara matarohia me ngā mara irahiko, ā, ka whakatuwhera hoki i tētahi ara hou mō te rangahau taketake me te whakamahinga o ngā taputapu optoelectronic spintronic me te photonic.
Wā tuku: Maehe-12-2024