Ngwa nkwukọrịta anya, ihe na-eme ka ihe na-emegharị anya nke ukwuu

Ngwa nkwukọrịta anya, ihe na-eme ka ihe na-emegharị anya nke ukwuu
Resonators anya nwere ike ịchọta ogologo ebili mmiri nke ìhè kpọmkwem n'ime oghere pere mpe, ma nwee ọrụ dị mkpa na mmekọrịta ihe gbasara ìhè,nkwukọrịta anya, ihe mmetụta anya, na njikọta anya. Nha nke resonator dabere na njirimara ihe na ogologo ebili mmiri ọrụ, dịka ọmụmaatụ, resonators silicon na-arụ ọrụ na eriri infrared dị nso na-achọkarị usoro anya nke ọtụtụ narị nanomita na karịa. N'afọ ndị na-adịbeghị anya, resonators anya planar dị gịrịgịrị adọtala ọtụtụ nlebara anya n'ihi ojiji ha nwere ike itinye na agba nhazi, onyonyo holographic, nhazi ubi ọkụ na ngwaọrụ optoelectronic. Otu esi ebelata ọkpụrụkpụ nke resonators planar bụ otu n'ime nsogbu siri ike ndị nchọpụta na-eche ihu.
N'adịghị ka ihe ndị e ji eme semiconductor ọdịnala, ihe mkpuchi topological 3D (dịka bismuth telluride, antimony telluride, bismuth selenide, wdg) bụ ihe ọmụma ọhụrụ nwere ọnọdụ elu ígwè echekwara na ọnọdụ insulator. Ọnọdụ elu ahụ na-echebe site na nhazi nke mgbanwe oge, elektrọn ya anaghịkwa agbasa site na ihe ndị na-abụghị magnetik, nke nwere atụmanya ngwa dị mkpa na kọmputa quantum dị ala na ngwaọrụ spintronic. N'otu oge ahụ, ihe mkpuchi topological na-egosipụtakwa ihe ngosi anya dị mma, dị ka nnukwu ntinye anya na-agbanwe agbanwe, nnukwu enweghị ahịrị.ngwa anyaọnụọgụgụ, oke ọrụ dị iche iche, mgbanwe, njikọta dị mfe, wdg, nke na-enye ikpo okwu ọhụrụ maka mmezu nke iwu ọkụ nangwaọrụ optoelectronic.
Otu ndị nyocha na China atụpụtala ụzọ e si emepụta resonators optical ultra-thin site na iji nnukwu mpaghara nanofilms nke na-eto eto bismuth telluride topological insulator. Oghere anya na-egosi njirimara nnabata resonance doro anya na nso infrared band. Bismuth telluride nwere nnukwu refractive index nke karịrị 6 na optical communication band (dị elu karịa refractive index nke ihe ndị e ji eme ka refractive dị elu dịka silicon na germanium), ka ọkpụrụkpụ oghere anya wee nwee ike iru otu iri abụọ nke resonance wavelength. N'otu oge ahụ, a na-etinye resonator optical na kristal photonic otu akụkụ, a na-ahụkwa mmetụta nghọta ọhụrụ nke electromagnetic kpatara na optical communication band, nke bụ n'ihi njikọ nke resonator na Tamm plasmon na nnyonye anya mbibi ya. Mmeghachi omume spectral nke mmetụta a dabere na ọkpụrụkpụ nke resonator optical ma sie ike maka mgbanwe nke ambient refractive index. Ọrụ a na-emepe ụzọ ọhụrụ maka mmezu nke ultrathin optical cave, topological insulator material spectrum regulatory na optoelectronic devices.
Dịka egosiri na FIG. 1a na 1b, ihe mejupụtara resonator optical bụ ihe mkpuchi bismuth telluride topological na nanofilm ọlaọcha. Ihe nkiri bismuth telluride nke magnetron sputtering kwadebere nwere nnukwu ebe na ezigbo larịị. Mgbe ọkpụrụkpụ nke ihe nkiri bismuth telluride na ọlaọcha dị 42 nm na 30 nm, n'otu n'otu, oghere anya na-egosipụta nnabata resonance siri ike na eriri nke 1100~1800 nm (Foto 1c). Mgbe ndị nchọpụta tinyere oghere anya a na kristal photonic nke ejiri ihe ndị ọzọ nke Ta2O5 (182 nm) na SiO2 (260 nm) kpuchie mee (Foto 1e), ndagwurugwu nnabata pụrụ iche (Foto 1f) pụtara nso oke nnabata resonant mbụ (~1550 nm), nke yiri mmetụta nghọta eletrọnịkị nke sistemụ atọm mepụtara.

E ji igwe onyonyo eletrọn nnyefe na ellipsometry mara ihe bismuth telluride. FIG. 2a-2c na-egosi micrographs eletrọn nnyefe (foto dị elu) na ụkpụrụ diffraction eletrọn ahọpụtara nke nanofilms bismuth telluride. Enwere ike ịhụ site na onyonyo ahụ na nanofilms bismuth telluride nke a kwadebere bụ ihe polycrystalline, isi nhazi uto bụ (015) kristal plane. Foto 2d-2f na-egosi ihe mgbagwoju anya nke refractive index nke bismuth telluride nke a tụrụ site na ellipsometer na ihe dabara na elu na steeti mgbagwoju anya refractive index. Nsonaazụ ya na-egosi na ihe njedebe nke ọnọdụ elu dị ukwuu karịa ihe nrịbama refractive na oke nke 230~1930 nm, na-egosi njirimara dị ka metal. Ndekọ ntụgharị ahụ karịrị 6 mgbe ogologo ebili mmiri karịrị 1385 nm, nke dị elu karịa nke silicon, germanium na ihe ndị ọzọ e ji eme ka ọ dị elu na-eme ka ọ dị n'ime eriri a, nke na-atọ ntọala maka nkwadebe nke resonators optical ultra-thin. Ndị nchọpụta na-ekwu na nke a bụ mmalite akụkọ banyere oghere anya planar insulator topological nke nwere ọkpụrụkpụ nke naanị iri nanomita na eriri nkwukọrịta optical. Mgbe nke ahụ gasịrị, a tụrụ spectrum absorption na ogologo resonance nke oghere anya ultra-thin na-eme ka ọ dị n'ime eriri anya ultra-thin. N'ikpeazụ, a na-enyocha mmetụta nke ọkpụrụkpụ ihe nkiri ọlaọcha na spectra nghọta eletrọnịkị na nhazi kristal bismuth telluride nanocavity/photonic.

Site n'ịkwadebe nnukwu ihe nkiri dị larịị nke ihe mkpuchi topological bismuth telluride, na iji uru nke ihe ngosi refractive dị elu nke ihe Bismuth telluride dị nso na eriri infrared, a na-enweta oghere anya planar nke nwere ọkpụrụkpụ nke naanị iri nanomita. Oghere anya dị gịrịgịrị nke ukwuu nwere ike ime ka ìhè resonant dị irè na eriri infrared dị nso, ma nwee uru ngwa dị mkpa na mmepe nke ngwaọrụ optoelectronic na eriri nkwukọrịta anya. Ọkpụrụkpụ nke oghere anya bismuth telluride dị larịị na ogologo ntụgharị resonant, ọ dịkwa obere karịa nke oghere anya silicon na germanium yiri ya. N'otu oge ahụ, a na-ejikọta oghere anya bismuth telluride na kristal photonic iji nweta mmetụta anya na-adịghị mma yiri nke nghọta eletrọnịkị nke sistemụ atọm, nke na-enye usoro ọhụrụ maka nhazi spectrum nke microstructure. Ọmụmụ ihe a na-arụ ọrụ ụfọdụ n'ịkwalite nnyocha nke ihe mkpuchi topological na nhazi ìhè na ngwaọrụ ọrụ anya.