Ngwa ngwa nkwurịta okwu, ultra-thin optical resonator

Ngwa ngwa nkwurịta okwu, ultra-thin optical resonator
Ndị na-emegharị anya nwere ike ịkọwapụta ogologo ebili mmiri dị iche iche n'obere oghere, ma nwee ngwa dị mkpa na mmekọrịta ọkụ,ngwa anya nkwurịta okwu, nyocha anya, na ntinye anya. The size nke resonator tumadi dabere na ihe onwunwe e ji mara na arụ ọrụ wavelength, ọmụmaatụ, silicon resonators na-arụ ọrụ na nso infrared gbalaga na-achọkarị ngwa anya owuwu nke narị nanometers na n'elu. N'ime afọ ndị na-adịbeghị anya, ultra-thin planar optical resonators adọtala nlebara anya nke ukwuu n'ihi ngwa ha nwere na agba nhazi, foto holographic, ụkpụrụ ọkụ ọkụ na ngwaọrụ optoelectronic. Otu esi ebelata oke nke resonators planar bụ otu n'ime nsogbu siri ike nke ndị nyocha chere ihu.
Dị iche na ihe semiconductor ọdịnala, 3D topological insulators (dị ka bismuth telluride, antimony telluride, bismuth selenide, wdg) bụ ozi ọhụrụ ihe nwere topologically chedo metal elu steeti na insulator steeti. A na-echekwa ọnọdụ elu ahụ site na nhụsianya nke ntụgharị oge, na eletrọn ya adịghị agbasasị site na adịghị ọcha na-abụghị magnetik, nke nwere atụmanya ngwa dị mkpa na obere ike quantum computing na ngwaọrụ spintronic. N'otu oge ahụ, topological insulator ihe na-egosikwa ezigbo ngwa anya, dị ka elu refractive index, nnukwu na-abụghị online.ngwa anyaọnụọgụgụ, obosara na-arụ ọrụ ụdịdị dị iche iche, tunability, mfe mwekota, wdg, nke na-enye ọhụrụ ikpo okwu maka mmezu nke ìhè ụkpụrụ na.ngwaọrụ optoelectronic.
Otu ndị ọrụ nyocha na China atụpụtala usoro maka imepụta ihe na-eme ihe na-ahụ anya dị oke mkpa site na iji nnukwu mpaghara na-eto eto bismuth telluride topological insulator nanofilms. Oghere anya na-egosi njirimara nnabata resonance doro anya na eriri infrared dị nso. Bismuth telluride nwere ihe nrịbama dị elu nke karịrị 6 n'ime igwe nkwurịta okwu anya (dị elu karịa ndenye ntugharị nke ihe ndenye ihe nrịbama dị elu dị ka silicon na germanium), nke mere na ọkpụrụkpụ oghere anya nwere ike iru otu ụzọ n'ụzọ iri abụọ nke resonance. ogologo ife efe. N'otu oge ahụ, a na-edobe resonator anya na kristal photonic nwere otu akụkụ, a na-ahụkwa mmetụta nghọta nke electromagnetic na-akpata na eriri nkwurịta okwu anya, nke bụ n'ihi njikọ nke resonator na Tamm plasmon na nnyonye anya na-emebi emebi. . Nzaghachi nhụsianya nke mmetụta a na-adabere na ọkpụrụkpụ nke resonator anya ma sie ike na mgbanwe nke ntụgharị refractive ambient. Ọrụ a na-emepe ụzọ ọhụrụ maka mmezu nke oghere anya ultrathin, ụkpụrụ ihe dị iche iche insulator nke topological na ngwaọrụ optoelectronic.
Dị ka egosiri na FIG. 1a na 1b, ngwa anya resonator bụ nke mejuputara nke insulator topological bismuth telluride na nanofilms ọlaọcha. Bismuth telluride nanofilms ndị a kwadebere site na sputtering magnetron nwere nnukwu mpaghara na ịdị larịị dị mma. Mgbe ọkpụrụkpụ nke ihe nkiri bismuth telluride na ọlaọcha bụ 42 nm na 30 nm, n'otu n'otu, oghere anya na-egosipụta nnabata resonance siri ike na band nke 1100 ~ 1800 nm (Njirimara 1c). Mgbe ndị ọrụ nyocha ahụ jikọtara oghere anya a na kristal photonic nke ejiri nchikota nke Ta2O5 (182 nm) na SiO2 (260 nm) n'ígwé (Ọnyonyo 1e), ndagwurugwu nnabata dị iche (Onyonyo 1f) pụtara n'akụkụ ọnụ ọgụgụ kacha elu resonant nke mbụ (~ 1550 nm), nke yiri mmetụta nghọta na-ebute site na sistemu atọm.

Ihe e ji mara ihe bismuth telluride bụ site na nnyefe eletrọn microscopy na ellipsometry. FIG. 2a-2c na-egosi nnyefe eletrọn micrographs (onyinyo nwere mkpebi dị elu) yana usoro mgbasa ozi eletrọn ahọpụtara nke bismuth telluride nanofilms. Enwere ike ịhụ site na ọnụ ọgụgụ ahụ na bismuth telluride nanofilms a kwadebere bụ ihe polycrystalline, na isi ihe na-eto eto bụ (015) kristal ụgbọelu. Ọgụgụ 2d-2f na-egosi nhụta ntugharị mgbagwoju anya nke bismuth telluride tụrụ site na ellipsometer na ọnọdụ elu dabara adaba na index refractive steeti. Nsonaazụ na-egosi na ọnụọgụ mkpochapụ nke ala dị elu dị ukwuu karịa ndezigharị refractive na nso nke 230 ~ 1930 nm, na-egosi njirimara metal. The refractive index nke ahụ bụ ihe karịrị 6 mgbe wavelength dị ukwuu karịa 1385 nm, nke dị nnọọ elu karịa nke silicon, germanium na ndị ọzọ omenala elu-refractive index ihe na nke a band, nke tọrọ ntọala maka nkwadebe nke ultra. - mkpa ngwa anya resonators. Ndị nyocha ahụ rụtụrụ aka na nke a bụ nke mbụ a kọrọ na achọpụtara oghere anya ihe nleba anya nke topological insulator nwere ọkpụrụkpụ naanị iri iri nanometers na igwe nkwurịta okwu anya. Mgbe nke ahụ gasịrị, a na-atụ ihe dị n'ụdị mmịpụta na resonance resonance nke oghere anya ultra-kpara na ọkpụrụkpụ nke bismuth telluride. N'ikpeazụ, a na-enyocha mmetụta nke ọkpụrụkpụ ihe nkiri ọlaọcha na ihe ngosi nghọta nke electromagnetic na-ebute na bismuth telluride nanocavity/photonic crystal

Site n'ịkwadebe nnukwu ihe nkiri dị larịị nke bismuth telluride topological insulators, na iji ohere nke ultra-high refractive index nke Bismuth telluride ihe dị n'akụkụ eriri infrared dị nso, a na-enweta oghere anya atụmatụ nke nwere naanị iri iri nanometers. Oghere anya dị nro dị oke mkpa nwere ike ghọta nnabata ọkụ resonant nke ọma na eriri infrared dị nso, ma nwee uru ngwa dị mkpa na mmepe nke ngwaọrụ optoelectronic na igwe nkwurịta okwu ngwa anya. Ọkpụrụkpụ nke oghere anya bismuth telluride dị n'ahịrị ruo ogologo ikuku resonant, ma pere mpe karịa nke silicon na oghere anya germanium yiri ya. N'otu oge ahụ, oghere anya bismuth telluride na-ejikọta ya na kristal photonic iji nweta mmetụta anya na-adịghị ahụkebe dị ka nghọta nke sistemu atomic na-ebute site na electromagnetic, nke na-enye usoro ọhụrụ maka nhazi nhazi nke microstructure. Ọmụmụ ihe a na-arụ ọrụ ụfọdụ n'ịkwalite nyocha nke ihe insulator topological na nhazi ọkụ na ngwaọrụ arụ ọrụ anya.