Waveguide yopangidwa ndi tungsten disulfide idapangidwa ndi mainjiniya aku University of California San Diego ndipo ndi magawo atatu okha a maatomu oonda ndipo ndiye chipangizo chowoneka bwino kwambiri padziko lonse lapansi! Ofufuza adasindikiza zomwe adapeza pa Aug 12 muNature Nanotechnology.

Waveguide watsopano, ndi pafupifupi 6 angstroms (1 angstrom = 10^-10mita), kuonda kuwirikiza ka 10,000 kuposa ulusi wamba, komanso kuonda nthawi 500 kuposa chipangizo cha on-chip optical circuit chophatikizika cha Photonic. Amakhala ndi gawo limodzi la tungsten disulfide loyimitsidwa pa silicon frame (wosanjikiza wa maatomu a tungsten ali pakati pa ma atomu awiri a sulfure), ndipo wosanjikiza umodzi umapanga kristalo wa Photonic kuchokera kumitundu ingapo ya nanopore.

Krustalo wosanjikiza umodzi ndi wapadera chifukwa amathandiza ma elekitironi-dzenje awiriawiri otchedwa excitons, pa firiji, excitons izi kupanga amphamvu kuwala kuyankha kotero kuti refractive index wa kristalo pafupifupi kanayi mpweya refractive index kuzungulira padziko. Mosiyana ndi izi, chinthu china chokhala ndi makulidwe omwewo sichikhala ndi index yotsika kwambiri. Pamene kuwala kumayenda mu kristalo, imatengedwa mkati ndikuyendetsedwa pamodzi ndi ndegeyo ndi kuwunikira kwathunthu kwamkati.

Kuwala kwa ma waveguide mu mawonekedwe owoneka ndi chinthu china chapadera. Waveguiding idawonetsedwa kale ndi graphene, yomwe ilinso yopyapyala, koma pamafunde a infrared. Gululo lidawonetsa koyamba mafunde akuyenda m'dera lowoneka. Mabowo opangidwa ndi nanosized mu krustalo amalola kuwala kwina kumwaza perpendicular kwa ndege kuti iwoneke ndikufufuzidwa. Mabowo ambiriwa amapanga mawonekedwe a nthawi ndi nthawi omwe amapangitsa kuti kristalo ikhale iwiri ngati resonator.

Izi zipangitsanso kuti ikhale thinnest kuwala resonator kwa kuwala kowoneka kuti kuwonetsedwe moyesera. Dongosololi silimangowonjezera kuyanjana kwazinthu zowunikira, komanso limagwira ntchito ngati cholumikizira chachiwiri cholumikizira kuwalako munjira yolumikizira kuwala.

Ofufuza adagwiritsa ntchito njira zapamwamba za micro- ndi nanofabrication kuti apange waveguide. Kupanga kamangidweko kunali kovuta kwambiri. Zinthuzo ndi zoonda kwambiri, motero ochita kafukufuku akupanga njira yoti ayimitse pa chimango cha silicon ndikuchipanga bwino osachiswa.

Tungsten disulfide waveguide ndi umboni wamalingaliro ochepetsera chipangizocho mpaka kukula kwake komwe ndi kocheperako kuposa zida zamakono. Zitha kupangitsa kukula kwa kachulukidwe kwambiri, tchipisi tambiri tokhala ndi ma photonic.