Cov khoom siv me me thiab cov lasers ua haujlwm tau zoo dua

Cov khoom siv me me thiab ua haujlwm tau zoo duacov lasers
Cov kws tshawb fawb ntawm Rensselaer Polytechnic Institute tau tsim ib qholub cuab yeej laserqhov ntawd tsuas yog qhov dav ntawm tib neeg cov plaub hau xwb, uas yuav pab cov kws tshawb fawb kawm txog cov yam ntxwv tseem ceeb ntawm cov khoom thiab lub teeb. Lawv cov haujlwm, luam tawm hauv cov ntawv xov xwm tshawb fawb muaj koob npe, kuj tseem tuaj yeem pab tsim cov lasers zoo dua rau kev siv hauv cov teb xws li kev kho mob mus rau kev tsim khoom.

LublaserLub cuab yeej no yog ua los ntawm cov khoom siv tshwj xeeb hu ua photonic topological insulator. Cov photonic topological insulators muaj peev xwm coj cov photons (cov nthwv dej thiab cov khoom me me uas ua lub teeb) los ntawm cov interfaces tshwj xeeb hauv cov khoom, thaum tiv thaiv cov khoom me me no kom tsis txhob tawg hauv cov khoom nws tus kheej. Vim yog cov yam ntxwv no, cov topological insulators ua rau ntau cov photons ua haujlwm ua ke tag nrho. Cov khoom siv no kuj tseem siv tau ua topological "quantum simulators," uas tso cai rau cov kws tshawb fawb kawm txog quantum phenomena - cov kev cai lij choj uas tswj hwm cov khoom ntawm qhov ntsuas me me heev - hauv mini-labs.
"Tusphotonic topologicalCov khoom siv rwb thaiv tsev uas peb ua yog tshwj xeeb. Nws ua haujlwm ntawm qhov kub thiab txias hauv chav. Qhov no yog qhov kev tshawb pom loj heev. Yav dhau los, cov kev tshawb fawb zoo li no tsuas yog siv tau los ntawm kev siv cov khoom siv loj, kim kom txias cov khoom hauv lub tshuab nqus tsev. Ntau lub chaw tshawb fawb LABS tsis muaj cov khoom siv zoo li no, yog li peb lub cuab yeej ua rau ntau tus neeg ua qhov kev tshawb fawb txog physics yooj yim no hauv chav kuaj, "said Rensselaer Polytechnic Institute (RPI) tus pab xibfwb hauv Department of Materials Science and Engineering thiab tus sau ntawv laus ntawm txoj kev tshawb fawb. Txoj kev tshawb fawb muaj qhov loj me me, tab sis cov txiaj ntsig qhia tias cov tshuaj tshiab tau pom tias muaj txiaj ntsig zoo hauv kev kho cov kab mob caj ces tsis tshua muaj no. Peb tos ntsoov yuav lees paub ntxiv txog cov txiaj ntsig no hauv kev sim tshuaj yav tom ntej thiab tej zaum yuav ua rau muaj kev xaiv kho mob tshiab rau cov neeg mob uas muaj kab mob no. "Txawm hais tias qhov loj me ntawm txoj kev tshawb fawb me me, cov kev tshawb pom qhia tias cov tshuaj tshiab no tau pom tias muaj txiaj ntsig zoo hauv kev kho cov kab mob caj ces tsis tshua muaj no. Peb tos ntsoov yuav lees paub ntxiv txog cov txiaj ntsig no hauv kev sim tshuaj yav tom ntej thiab tej zaum yuav ua rau muaj kev xaiv kho mob tshiab rau cov neeg mob uas muaj kab mob no.
"Qhov no kuj yog ib kauj ruam loj rau pem hauv ntej hauv kev tsim cov lasers vim tias peb qhov chaw kub hauv chav (qhov ntau ntawm lub zog xav tau los ua kom nws ua haujlwm) yog xya npaug qis dua li cov khoom siv cryogenic yav dhau los," cov kws tshawb fawb ntxiv. Cov kws tshawb fawb ntawm Rensselaer Polytechnic Institute siv tib txoj kev siv los ntawm kev lag luam semiconductor los ua microchips los tsim lawv cov cuab yeej tshiab, uas cuam tshuam nrog kev sib sau ua ke ntawm ntau hom khoom siv txheej los ntawm txheej, los ntawm qib atomic mus rau qib molecular, los tsim cov qauv zoo tagnrho nrog cov khoom tshwj xeeb.
Yuav ua kom lubcov khoom siv laser, cov kws tshawb fawb tau tsim cov phaj nyias nyias ntawm selenide halide (ib qho siv lead ua los ntawm cesium, lead thiab chlorine) thiab cov polymers uas muaj qauv etched rau ntawm lawv. Lawv tau muab cov phaj siv lead ua thiab polymers no tso rau ntawm ntau yam khoom oxide, ua rau muaj ib yam khoom uas tuab li 2 microns thiab ntev thiab dav li 100 microns (qhov dav nruab nrab ntawm cov plaub hau tib neeg yog 100 microns).
Thaum cov kws tshawb fawb ci lub laser rau ntawm lub cuab yeej laser, ib daim duab peb ceg ci ntsa iab tshwm sim ntawm qhov chaw tsim khoom siv. Tus qauv no yog txiav txim siab los ntawm kev tsim khoom siv thiab yog qhov tshwm sim ntawm cov yam ntxwv topological ntawm lub laser. "Kev muaj peev xwm kawm txog cov xwm txheej quantum ntawm chav tsev kub yog qhov kev cia siab zoo siab. Xibfwb Bao txoj haujlwm tshiab qhia tau hais tias kev tsim khoom siv tuaj yeem pab peb teb qee cov lus nug loj tshaj plaws hauv kev tshawb fawb." Rensselaer Polytechnic Institute tus thawj coj engineering hais.