Giant Electro-Optical Effect in Ge/SiGe Coupled Quantum Wells

Silicon tushen photonics a halin yanzu ana la'akari da tsara na gaba photonics dandamali don shigar da sadarwa.Koyaya, haɓaka ƙananan na'urori masu daidaitawa da ƙarancin ƙarfi ya kasance ƙalubale.Anan mun ba da rahoton babban tasirin lantarki-na gani a cikin Ge/SiGe haɗe-haɗe rijiyoyin ƙididdiga.Wannan sakamako mai ban sha'awa ya dogara ne akan tasirin kididdigar kididdigar Stark saboda keɓancewar keɓancewa na electrons da ramuka a cikin rijiyoyin ƙididdiga na Ge/SiGe.Ana iya amfani da wannan al'amari don inganta aikin masu daidaita haske sosai idan aka kwatanta da daidaitattun hanyoyin da aka haɓaka zuwa yanzu a cikin silicon photonics.Mun auna canje-canje a cikin fihirisar refractive har zuwa 2.3 × 10-3 a wutar lantarki na son zuciya na 1.5 V tare da daidaitaccen daidaitawa VπLπ na 0.046 Vcm.Wannan zanga-zangar tana buɗe hanya don haɓaka ingantattun na'urori masu daidaitawa masu saurin sauri dangane da tsarin kayan Ge/SiGe.