Dziko latsopano la zida za optoelectronic

Dziko latsopano lazida za optoelectronic

Ofufuza ku Technion-Israel Institute of Technology apanga njira yoyendetsedwa bwinolaser kuwalakutengera gawo limodzi la atomiki. Kupeza kumeneku kunatheka chifukwa cha kuyanjana kogwirizana kodalirana pakati pa atomiki wosanjikiza umodzi ndi lattice yopingasa yopingasa ya photonic spin lattice, yomwe imathandizira chigwa chapamwamba kwambiri cha Q kudzera pa Rashaba-mtundu wa spin kugawanika kwa ma photon a mayiko omangika mopitilira.
Zotsatira zake, zomwe zidasindikizidwa mu Nature Materials ndikuwunikira mwachidule kafukufukuyu, zimatsegula njira yophunzirira zochitika zokhudzana ndi spin mu classical ndi spin.machitidwe a quantum, ndikutsegula njira zatsopano zofufuzira ndikugwiritsa ntchito ma electron ndi photon spin mu zipangizo za optoelectronic. Spin Optical source imaphatikiza mawonekedwe a photon ndi kusintha kwa ma elekitironi, komwe kumapereka njira yophunzirira kusinthana kwa chidziwitso cha spin pakati pa ma electron ndi ma photon ndikupanga zida zapamwamba za optoelectronic.

Spin valley optical microcavities amapangidwa ndi interfacing photonic spin lattices ndi inversion asymmetry (yellow core dera) ndi inversion symmetry (cyan cladding dera).
Kuti mupange magwero awa, chofunikira ndikuchotsa kufooka kwa spin pakati pa zigawo ziwiri zotsutsana ndi gawo la photon kapena electron. Izi nthawi zambiri zimatheka pogwiritsa ntchito mphamvu ya maginito pansi pa Faraday kapena Zeeman effect, ngakhale kuti njirazi nthawi zambiri zimafuna mphamvu ya maginito ndipo sizingathe kupanga microsource. Njira ina yodalirika ikutengera makina a kamera a geometric omwe amagwiritsa ntchito mphamvu ya maginito kuti apange ma spin-split state of photons mumlengalenga.
Tsoka ilo, zowonera zam'mbuyomu zamayiko ogawikana zidadalira kwambiri njira zofalitsa zotsika kwambiri, zomwe zimayika zopinga pakulumikizana kwakanthawi komanso kwakanthawi kwa magwero. Njira iyi imasokonezedwanso ndi mawonekedwe oyendetsedwa ndi spin a blocky laser-gain materials, omwe sangathe kapena sangagwiritsidwe ntchito mosavuta kuwongolera mwachangu.magwero a kuwala, makamaka ngati palibe mphamvu ya maginito pa kutentha kwa chipinda.
Kuti akwaniritse zigawo zapamwamba za Q spin-splitting, ofufuzawo adapanga ma photonic spin lattices okhala ndi ma symmetry osiyanasiyana, kuphatikiza pachimake chokhala ndi inversion asymmetry ndi inversion symmetric envelopu yophatikizidwa ndi WS2 wosanjikiza umodzi, kuti apange zigwa zozungulira zozungulira. Lattice yoyambira yosinthika yomwe imagwiritsidwa ntchito ndi ofufuza ili ndi zinthu ziwiri zofunika.
The controllable spin-dependent reciprocal lattice vector chifukwa cha geometric phase space kusiyana kwa heterogeneous anisotropic nanoporous wopangidwa ndi iwo. Vector iyi imagawaniza gulu lowonongeka kukhala nthambi ziwiri zopindika mumlengalenga, zomwe zimadziwika kuti Photonic Rushberg effect.
Magawo awiri a Q symmetric (quasi) omangika mopitilira, omwe ndi ±K(Brillouin band Angle) zigwa za photon m'mphepete mwa nthambi zogawanika, zimapanga mawonekedwe osakanikirana a amplitudes ofanana.
Pulofesa Koren ananena kuti: “Tinagwiritsa ntchito ma monolides a WS2 monga zinthu zopezera phindu chifukwa chodziŵika bwino cha band-gap transition metal disulfide chili ndi chigwa chapadera cha pseudo-spin ndipo chaphunziridwa mozama ngati njira ina yonyamulira zidziwitso mu ma elekitironi a m’chigwa. Makamaka, ma excitons awo a ±K 'chigwa (omwe amawonekera ngati ma planar spin-polarized dipole emitters) amatha kusangalatsidwa mwapadera ndi kuwala kozungulira polarized molingana ndi malamulo osankha kufananitsa zigwa, motero kuwongolera mwachangugwero la kuwala.
Mu gawo limodzi lophatikizika la spin valley microcavity, ±K 'chigwa chosangalatsa chimaphatikizidwa ku ±K spin Valley state pofananiza polarization, ndipo spin exciton laser pa kutentha kwachipinda imazindikirika ndi mayankho amphamvu. Pa nthawi yomweyo, alasermakina amayendetsa gawo lodziyimira lodziyimira pawokha la ±K 'chigwa kuti apeze malo otayika pang'ono a dongosolo ndikukhazikitsanso kulumikizana kotsekera kutengera gawo la geometric moyang'anizana ndi chigwa cha ±K spin.
Kugwirizana kwa chigwa choyendetsedwa ndi makina a laser awa kumathetsa kufunikira kwa kutentha kwapang'onopang'ono kwa kubalalikana kwapakatikati. Kuphatikiza apo, kutayika kochepa kwambiri kwa laser ya Rashba monolayer kumatha kusinthidwa ndi polarization yozungulira (yozungulira), yomwe imapereka njira yowongolera kulimba kwa laser komanso kulumikizana kwa malo. "
Pulofesa Hasman akufotokoza kuti: “Zovumbulutsidwachithunzispin valley Rashba effect imapereka njira zambiri zopangira magwero owoneka bwino a pamwamba-emitting spin. Kugwirizana kwa chigwa komwe kumawonetsedwa mu gawo limodzi lophatikizana la spin valley microcavity kumatibweretsera sitepe imodzi pafupi ndi kukwaniritsa kuchulukana kwa chidziwitso pakati pa ±K 'chigwa cha excitons kudzera pa qubits.
Kwa nthawi yayitali, gulu lathu lakhala likupanga ma spin Optics, pogwiritsa ntchito Photon spin ngati chida chothandizira kuwongolera machitidwe a mafunde amagetsi. Mu 2018, pochita chidwi ndi chigwa cha pseudo-spin muzinthu ziwiri-dimensional, tinayamba ntchito yayitali kuti tifufuze momwe magwero a maginito amayendera ma atomiki popanda maginito. Timagwiritsa ntchito mtundu wosagwirizana ndi gawo la Berry kuti tithane ndi vuto lopeza gawo logwirizana la geometric kuchokera ku chigwa chimodzi cha exciton.
Komabe, chifukwa chosowa njira yolumikizirana yolimba pakati pa ma excitons, kufunikira kogwirizana kwa ma excitons angapo a zigwa mu Rashuba single-wosanjikiza gwero lowala lomwe lakwaniritsidwa silinathe. Vutoli limatilimbikitsa kuti tiganizire za Rashuba chitsanzo cha high Q photons. Titapanga njira zatsopano zogwirira ntchito, tagwiritsa ntchito laser ya Rashuba single-layer laser yomwe yafotokozedwa patsamba lino. ”
Kupambana kumeneku kumapereka njira yophunzirira zochitika zolumikizana za spin corelation m'magawo akale ndi kuchuluka, ndikutsegula njira yatsopano yofufuzira ndikugwiritsa ntchito zida za spintronic ndi photonic optoelectronic.