Ntxiv mus, raws li lawv tau pom nyob rau hauv daim ntawv "Direct bandgap emission los ntawm hexagonal germanium thiab silicon-germanium alloys" luam tawm nyob rau hauv phau ntawv journal Nature, lawv muaj peev xwm ua tau.Cov hluav taws xob wavelength tsis tu ncua adjustable nyob rau hauv ntau yam.Raws li lawv, cov kev tshawb pom tshiab no tuaj yeem tso cai rau kev txhim kho ntawm photonic chips ncaj qha hauv silicon-germanium integrated circuits.
Tus yuam sij rau kev hloov SiGe alloys rau hauv cov khoom siv hluav taws xob ncaj qha yog kom tau txais germanium thiab germanium-silicon alloys nrog cov qauv hexagonal lattice.Cov kws tshawb fawb ntawm Technical University of Eindhoven, ua ke nrog cov npoj yaig los ntawm Technical University of Munich thiab cov tsev kawm qib siab ntawm Jena thiab Linz, siv nanowires ua los ntawm cov khoom sib txawv raws li cov qauv rau kev loj hlob hexagonal.
Cov nanowires tom qab ntawd ua cov qauv rau lub plhaub germanium-silicon rau cov khoom siv hauv qab imposes ib hexagonal siv lead ua qauv.Thaum pib, txawm li cas los xij, cov qauv no tsis tuaj yeem zoo siab los tawm lub teeb.Tom qab sib pauv tswv yim nrog cov npoj yaig ntawm Walther Schottky lub koom haum ntawm Technical University of Munich, lawv tau tshuaj xyuas cov khoom kho qhov muag ntawm txhua tiam neeg thiab nws thiaj li ua kom zoo rau cov txheej txheem tsim khoom mus rau qhov chaw uas cov nanowires tuaj yeem tawm lub teeb.
"Tam sim no, peb tau ua tiav kev ua tau zoo yuav luag piv rau indium phosphide lossis gallium arsenide," hais tias Prof. Erik Bakkers los ntawm Eindhoven University of Technology.Yog li ntawd, kev tsim cov lasers raws li germanium-silicon alloys uas tuaj yeem koom ua ke rau hauv cov txheej txheem tsim khoom ib txwm tuaj yeem yog lub sijhawm xwb.
Jonathan Finley, tus kws tshaj lij ntawm semiconductor quantum nanosystems ntawm TUM tau hais tias "Yog tias peb tuaj yeem muab kev sib txuas lus sab hauv thiab hauv nruab nrab ntawm cov khoom siv hluav taws xob, qhov ceev tuaj yeem nce ntxiv los ntawm 1,000".tuaj yeem txo tus naj npawb ntawm laser radars, tshuaj sensors rau kev kuaj mob, thiab chips rau ntsuas huab cua thiab zaub mov zoo. "
Lub silicon germanium alloy melted los ntawm peb lub tuam txhab tuaj yeem txais cov kev faib ua feem
Post lub sij hawm: Jun-21-2023