Mahadum Peking ghọtara perovskite na-aga n'ihuisi iyi lasererughị 1 square micron
Ọ dị mkpa iji wuo isi iyi laser na-aga n'ihu na mpaghara ngwaọrụ na-erughị 1μm2 iji gboo obere ike oriri chọrọ nke njikọ njikọ anya on-chip (<10 fJ bit-1). Agbanyeghị, ka nha ngwaọrụ na-ebelata, mfu ngwa anya na ihe onwunwe na-abawanye nke ukwuu, yabụ inweta nha ngwaọrụ sub-micron na ịgbapụta ngwa anya na-aga n'ihu nke isi iyi laser bụ ihe siri ike. N'ime afọ ndị na-adịbeghị anya, ihe halide perovskite enwetawo nlebara anya dị ukwuu n'ọhịa nke lasers optically pumped na-aga n'ihu n'ihi uru ha dị elu na ihe pụrụ iche exciton polariton. Ebe ngwaọrụ nke perovskite na-aga n'ihu laser isi mmalite kọrọ ugbu a ka ukwuu karịa 10μm2, na submicron laser isi iyi niile chọrọ pulsed ìhè na elu mgbapụta ike njupụta na-akpali.
Na nzaghachi maka ihe ịma aka a, otu nnyocha nke Zhang Qing si School of Materials Science and Engineering of Peking University na-akwadebe nke ọma elu-edu perovskite submicron otu crystal ihe iji nweta na-aga n'ihu ngwa anya mgbapụta laser isi iyi na ngwaọrụ dị ka ala dị ka 0.65μm2. N'otu oge ahụ, a na-ekpughe foton. Aghọtara nke ọma usoro nke exciton polariton na submicron na-aga n'ihu na-agbapụta lasing optically, nke na-enye echiche ọhụrụ maka mmepe nke obere lasers semiconductor dị ala. Nsonaazụ nke ọmụmụ ahụ, akpọrọ "Continuous Wave Pumped Perrovskite Lasers with Device Area N'okpuru 1 μm2," ka ebipụtara na nso nso a na Advanced Materials.
N'ime ọrụ a, a kwadebere mpempe micron nke inorganic perovskite CsPbBr3 na sapphire substrate site na ntinye kemịkalụ. Achọpụtara na njikọ siri ike nke perovskite excitons na ụda mgbidi microcavity photon na ụlọ okpomọkụ mere ka e nwee polariton excitonic. Site n'usoro ihe akaebe, dị ka linear ruo n'ike ikuku na-adịghị na ntanetị, obosara ahịrị dị warara, mgbanwe ngbanwe nke ikuku ikuku na mgbanwe ngbanwe oghere na ọnụ ụzọ, a na-ekwenye na kristal nke sub-micron-sized CsPbBr3, yana mpaghara ngwaọrụ. dị obere ka 0.65μm2. N'otu oge ahụ, achọpụtara na ọnụ ụzọ nke isi iyi laser submicron yiri nke isi iyi laser buru ibu, ọ pụkwara ọbụna ịdị ala (Nyocha 1).
Onyonyo 1. Na-aga n'ihu na-agbapụta ngwa anya submicron CsPbBr3isi iyi ọkụ laser
Ọzọkwa, ọrụ a na-enyocha ma nnwale na usoro, ma na-ekpughe usoro exciton-polarized excitons na mmezu nke submicron na-aga n'ihu laser isi mmalite. Njikọ foton-exciton emelitere na submicron perovskites na-ebute mmụba dị ukwuu na ndenye ntugharị otu ahụ ruo ihe dị ka 80, nke na-abawanye uru ọnọdụ ahụ iji kwụọ ụgwọ maka mfu ọnọdụ ahụ. Nke a na-ebutekwa isi iyi laser perovskite submicron nwere ihe njiri mara mma microcavity dị elu dị elu yana ogologo ahịrị ikuku dị warara (Njirimara 2). Usoro ahụ na-enyekwa nghọta ọhụrụ banyere mmepe nke obere obere lasers nke dị ala na-adabere na ihe ndị ọzọ semiconductor.
Ọgụgụ 2. Usoro nke isi iyi laser sub-micron na-eji excitonic polarizons
Song Jiepeng, nwa akwụkwọ 2020 Zhibo sitere na oflọ Akwụkwọ nke Science Materials na Engineering nke Mahadum Peking, bụ onye edemede mbụ nke akwụkwọ akụkọ ahụ, Mahadum Peking bụkwa akụkụ mbụ nke akwụkwọ ahụ. Zhang Qing na Xiong Qihua, prọfesọ nke physics na Mahadum Tsinghua, bụ ndị odee kwekọrọ. Ndị National Natural Science Foundation nke China na Beijing Science Foundation maka ndị ntorobịa pụtara ìhè kwadoro ọrụ a.
Oge nzipu: Sep-12-2023