Optical communication band, ultra-thin optical resonator

Optical communication band, ultra-thin optical resonator
Optical resonators inogona kuisa mafungu chaiwo emafungu emwenje munzvimbo shoma, uye kuve neakakosha maapplication mukuita kwechiedza-nyaya,optical communication, optical sensing, uye kubatanidzwa kwemaziso. Saizi yeresonator inonyanya kuenderana nehunhu hwezvinhu uye yewavelength yekushanda, semuenzaniso, silicon resonators inoshanda mupedyo infrared bhendi kazhinji inoda zvimiro zvemaziso emazana ema nanometers uye pamusoro. Mumakore achangopfuura, ultra-thin planar optical resonators yakakwezva kutarisisa nekuda kwekugona kwavo kushandiswa muruvara rwechimiro, holographic imaging, light field regulation uye optoelectronic zvishandiso. Nzira yekudzikisa sei kukora kwe planar resonators ndeimwe yematambudziko akaoma anotarisana nevatsvakurudzi.
Yakasiyana kubva kune yechinyakare semiconductor zvinhu, 3D topological insulators (senge bismuth telluride, antimony telluride, bismuth selenide, zvichingodaro.) zvinhu zvitsva zveruzivo zvine topologically yakadzivirirwa simbi pamusoro nyika uye insulator nyika. Nzvimbo yepasi inodzivirirwa ne symmetry yenguva inversion, uye maerekitironi ayo haana kuparadzirwa neasina magineti tsvina, iyo ine yakakosha tarisiro yekushandisa mune yakaderera-simba quantum komputa uye spintronic zvishandiso. Panguva imwecheteyo, topological insulator zvinhu zvinoratidzawo yakanakisa optical zvivakwa, senge yakakwira refractive index, hombe isina mutsara.opticalcoefficient, wide working spectrum range, tunability, nyore kusanganisa, nezvimwewo, izvo zvinopa chikuva chitsva chekuzadzikiswa kwechiedza chekutonga uyeoptoelectronic zvishandiso.
Chikwata chekutsvagisa kuChina chapa zano nzira yekugadzira ma-ultra-thin optical resonators nekushandisa nzvimbo yakakura inokura bismuth telluride topological insulator nanofilms. Iyo optical cavity inoratidza zviri pachena resonance absorption maitiro mupedyo infrared bhendi. Bismuth telluride ine yakakwira kwazvo refractive index inopfuura 6 mu optical communication band (yakakwirira kudarika refractive index yetsika dzechinyakare high refractive index zvinhu zvakaita sesilicon negermanium), kuitira kuti ukobvu hwemaziso hunogona kusvika pachikamu chemakumi maviri eresonance. wavelength. Panguva imwecheteyo, resonator yemaziso inoiswa pane imwe-dimensional photonic crystal, uye novel electromagnetic induced transparency effect inoonekwa mu optical communication band, iyo inokonzerwa nekubatanidza resonator neTamm plasmon uye kukanganisa kwayo kunoparadza. . Iyo spectral mhinduro yeichi chiitiko inoenderana nehupamhi hweiyo optical resonator uye yakasimba kune shanduko yeambient refractive index. Iri basa rinovhura nzira nyowani yekuzadzikiswa kweiyo ultrathin optical cavity, topological insulator material spectrum regulation uye optoelectronic devices.
Sezvinoratidzwa muFIG. 1a uye 1b, resonator yemaziso inonyanya kuumbwa nebismuth telluride topological insulator uye sirivheri nanofilms. Iyo bismuth telluride nanofilms yakagadzirwa nemagnetron sputtering ine nzvimbo yakakura uye yakanaka flatness. Kana ukobvu hwebismuth telluride uye sirivheri mafirimu ari 42 nm uye 30 nm, zvichiteerana, iyo optical cavity inoratidza yakasimba resonance absorption mubhendi ye1100 ~ 1800 nm (Mufananidzo 1c). Vatsvakurudzi pavakabatanidza iyi ganda remaziso pane photonic crystal yakagadzirwa nealternating stacks eTa2O5 (182 nm) uye SiO2 (260 nm) zvidimbu (Mufananidzo 1e), mupata wekunyura wakasiyana (Mufananidzo 1f) wakaonekwa pedyo nepamusoro pekutanga resonant absorption (~ 1550 nm), yakafanana neiyo electromagnetic induced transparency effect inogadzirwa nemaatomu masisitimu.

Iyo bismuth telluride zvinhu yairatidzwa nekutapurirana electron microscopy uye ellipsometry. FIG. 2a-2c inoratidza kutapurirana electron micrographs (yakakwirira-resolution mifananidzo) uye yakasarudzwa electron diffraction mapatani e bismuth telluride nanofilms. Inogona kuonekwa kubva pamufananidzo kuti yakagadzirwa bismuth telluride nanofilms zvinhu zvepolycrystalline, uye hukuru hwekukura huri (015) crystal plane. Mufananidzo 2d-2f unoratidza iyo yakaoma refractive index ye bismuth telluride yakayerwa ne ellipsometer uye yakaiswa pamusoro penyika uye nyika yakaoma refractive index. Mhedzisiro yacho inoratidza kuti kupera kweiyo coefficient yenzvimbo yepamusoro yakakura kupfuura iyo refractive index muhuwandu hwe230 ​​~ 1930 nm, inoratidza simbi-yakafanana maitiro. Iyo refractive index yemuviri inodarika 6 kana wavelength yakakura kupfuura 1385 nm, iyo yakanyanya kukwirira kupfuura iyo yesilicon, germanium uye mamwe echinyakare epamusoro-refractive index zvinhu mubhendi iyi, inoisa hwaro hwekugadzirira kwekupedzisira. -tete optical resonators. Vatsvagiri vanonongedza kuti iyi ndiyo yekutanga kushumwa kuitika kweiyo topological insulator planar optical cavity ine ukobvu hwemakumi emananomita chete mubhendi rekutaurirana. Mushure mezvo, kunyura kwemavara uye resonance wavelength ye-ultra-thin optical cavity yakayerwa nehukobvu hwebismuth telluride. Chekupedzisira, mhedzisiro yesirivheri firimu ukobvu pane electromagnetic induced transparency spectra mu bismuth telluride nanocavity/photonic crystal zvimiro inoongororwa.

Nekugadzirira nzvimbo hombe yakatetepa mafirimu e bismuth telluride topological insulators, uye kutora mukana weiyo yekupedzisira-yakakwirira refractive index yeBismuth telluride zvinhu mupedyo ne infrared bhendi, planar optical cavity ine ukobvu hwemakumi emakumi emananomita chete inowanikwa. Iyo yekupedzisira-yakatetepa optical cavity inogona kuona inoshanda resonant mwenje kunyudza mune iri padyo infrared bhendi, uye ine yakakosha kukosha kwekushandisa mukugadzirwa kwemidziyo yeoptoelectronic mubhendi rekutaurirana rekuona. Ukobvu hwebismuth telluride optical cavity hune mutsara kune resonant wavelength, uye idiki pane iyo yakafanana nesilicon uye germanium optical cavity. Panguva imwecheteyo, bismuth telluride optical cavity inosanganiswa nephotonic crystal kuti iwane anomalous optical effect yakafanana ne electromagnetic induced transparency of atomic system, iyo inopa nzira itsva ye spectrum regulation ye microstructure. Ichi chidzidzo chine rimwe basa mukusimudzira tsvakiridzo yetopological insulator zvinhu muchiedza regi uye optical inoshanda zvishandiso.