Jami'ar Peking ta sami ci gaba mai zurfitushen laserƙasa da micron murabba'in 1
Yana da mahimmanci don gina tushen laser mai ci gaba tare da yanki na na'ura da ke ƙasa da 1μm2 don saduwa da ƙarancin amfani da makamashi na haɗin haɗin kai-kan-chip (<10 fJ bit-1). Koyaya, yayin da girman na'urar ke raguwa, asarar gani da kayan abu suna ƙaruwa sosai, don haka cimma girman girman na'urar da ci gaba da yin famfo na tushen laser yana da ƙalubale sosai. A cikin 'yan shekarun nan, halide perovskite kayan sun sami m hankali a fagen ci gaba da optically famfo Laser saboda su high Tantancewar riba da musamman exciton polariton Properties. The na'urar yankin na perovskite ci gaba da Laser kafofin ruwaito ya zuwa yanzu shi ne mafi girma fiye da 10μm2, da submicron Laser kafofin duk bukatar pulsed haske tare da mafi girma famfo makamashi yawa don ta da.
Dangane da wannan ƙalubale, ƙungiyar bincike ta Zhang Qing daga Makarantar Kimiyyar Materials da Injiniya ta Jami'ar Peking ta yi nasarar shirya manyan kayan perovskite submicron guda kristal don cimma ci gaba da yin famfo Laser na na'ura mai ƙasa da 0.65μm2. A lokaci guda kuma, photon yana bayyana. The inji na exciton polariton a submicron ci gaba da optically famfo lasing tsari ne warai fahimta, wanda ya ba da wani sabon ra'ayi ga ci gaban kananan size low kofa semiconductor Laser. Sakamakon binciken, mai suna "Ci gaba da Wave Pumped Perovskite Lasers tare da Na'urar Na'ura da ke ƙasa da 1 μm2," an buga kwanan nan a cikin Materials masu tasowa.
A cikin wannan aikin, an shirya takaddun micron na inorganic perovskite CsPbBr3 akan sapphire substrate ta hanyar tururin sinadarai. An lura cewa ƙaƙƙarfan haɗakarwa na perovskite excitons tare da sautin bango microcavity photons a cikin zafin jiki ya haifar da samuwar polariton excitonic. Ta hanyar jerin shaidu, irin su linzamin kwamfuta zuwa ƙarfin fitar da ba a kan layi ba, kunkuntar layin nisa, canjin polarization na iska, da canjin daidaituwar sararin samaniya a bakin kofa, an tabbatar da ci gaba da yin famfo mai kyalli mai kyalli na ƙananan ƙananan girman CsPbBr3 crystal guda ɗaya, kuma yankin na'urar. ƙasa da 0.65μm2. A lokaci guda, an gano cewa bakin kofa na tushen laser submicron ya yi daidai da na babban tushen Laser, kuma yana iya zama ƙasa da ƙasa (Hoto 1).
Hoto 1. Ci gaba da yin famfo na gani da ido submicron CsPbBr3Laser haske tushen
Bugu da ari, wannan aikin yana bincika duka gwaje-gwaje da ka'ida, kuma yana bayyana tsarin exciton-polarized excitons a cikin fahimtar tushen tushen laser na submicron. Ingantattun haɗin gwiwar photon-exciton a cikin submicron perovskites yana haifar da haɓaka mai mahimmanci a cikin rukunin refractive index zuwa kusan 80, wanda ke ƙara haɓaka yanayin don rama asarar yanayin. Wannan kuma yana haifar da tushen laser submicron na perovskite tare da ingantaccen ma'aunin ingancin microcavity mafi girma da kunkuntar layin fitar da iska (Hoto 2). Har ila yau, tsarin yana ba da sababbin fahimta game da ci gaba da ƙananan ƙananan ƙananan ƙananan ƙananan lasers dangane da sauran kayan aikin semiconductor.
Hoto 2. Injiniyan tushen Laser sub-micron ta amfani da polarizons excitonic
Song Jiepeng, dalibin Zhibo na 2020 daga Makarantar Kimiyyar Kayayyaki da Injiniya ta Jami'ar Peking, ita ce ta farko ta rubuta takarda, kuma Jami'ar Peking ita ce rukunin farko na takardar. Zhang Qing da Xiong Qihua, farfesa a fannin Physics a Jami'ar Tsinghua, su ne mawallafin da suka dace. Gidauniyar kimiyyar dabi'a ta kasar Sin da kuma gidauniyar kimiyya ta Beijing don hazikan matasa ne suka tallafa wa aikin.
Lokacin aikawa: Satumba-12-2023