Mahadum Peking chọpụtara na perovskite na-aga n'ihuisi iyi laserobere karịa 1 sụkwịa maịkrọn
Ọ dị mkpa iwulite isi iyi laser na-aga n'ihu nke nwere mpaghara ngwaọrụ na-erughị 1μm2 iji mezuo obere oriri ike nke njikọ anya na-agbagharị agbagharị (<10 fJ bit-1). Agbanyeghị, ka nha ngwaọrụ na-ebelata, mfu anya na ihe na-abawanye nke ukwuu, yabụ iru nha ngwaọrụ sub-micron na mgbapụta anya na-aga n'ihu nke isi iyi laser na-aga n'ihu bụ ihe siri ike nke ukwuu. N'afọ ndị na-adịbeghị anya, ihe halide perovskite enwetawo nlebara anya dị ukwuu n'ọhịa nke lasers a na-agbagharị agbagharị na-aga n'ihu n'ihi uru anya dị elu ha na njirimara exciton polariton pụrụ iche. Mpaghara ngwaọrụ nke isi iyi laser na-aga n'ihu perovskite akọọrọ ruo ugbu a ka karịrị 10μm2, isi iyi laser submicron niile chọrọ ọkụ pulsed nwere njupụta ike mgbapụta dị elu iji kpalie.
N'ịzaghachi ihe ịma aka a, otu nnyocha nke Zhang Qing si na School of Materials Science and Engineering nke Mahadum Peking kwadebere ihe dị elu nke submicron submicron dị iche iche iji nweta isi mmalite laser na-agba ọsọ na-aga n'ihu na mpaghara ngwaọrụ dị ala dị ka 0.65μm2. N'otu oge ahụ, a na-ekpughe photon. Usoro nke exciton polariton na submicron continuous optically pumped lasing a ghotara nke ọma, nke na-enye echiche ọhụrụ maka mmepe nke obere obere obere oghere semiconductor lasers. Nsonaazụ nke ọmụmụ ihe a, nke akpọrọ "Continuous Wave Pumped Perovskite Lasers with Device Area Below 1 μm2," ka ebipụtara n'oge na-adịbeghị anya na Advanced Materials.
N'ọrụ a, e ji ihe mkpuchi anwụrụ ọkụ kemịkalụ mepụta mpempe akwụkwọ kristal perovskite CsPbBr3 nke na-adịghị ahụkebe na sapphire substrate site na iji ihe ndị na-eme ka anwụrụ ọkụ dị na ya. A hụrụ na njikọ siri ike nke excitons perovskite na microcavity photons nke mgbidi ụda na okpomọkụ ụlọ mere ka e nwee excitonic polariton. Site na usoro ihe akaebe, dị ka ike mwepụta linear ruo na-abụghị ahịrị, obosara ahịrị dị warara, mgbanwe polarization na mgbanwe njikọ oghere na njedebe, a na-akwado lase fluorescence na-aga n'ihu nke obere kristal CsPbBr3 nke nwere optically pumped, mpaghara ngwaọrụ ahụ dịkwa ala dị ka 0.65μm2. N'otu oge ahụ, achọpụtara na njedebe nke isi iyi laser submicron yiri nke isi iyi laser buru ibu, ọ nwekwara ike ịdị ala (Foto 1).
Foto 1. Submicron CsPbBr3 nke a na-agbagharị n'ihu na-aga n'ihuisi iyi ọkụ laser
Ọzọkwa, ọrụ a na-enyocha ma n'ime nnwale ma n'ime echiche, ma na-ekpughe usoro nke excitons excitons-polarized na mmezu nke submicron continuous laser sources. Njikọ photon-exciton emelitere na submicron perovskites na-eme ka mmụba dị ukwuu na nhazi refractive otu ruo ihe dị ka 80, nke na-eme ka uru mode dịkwuo elu iji kwụọ ụgwọ maka mfu mode. Nke a na-emekwa ka isi iyi laser submicron perovskite nwere ihe dị mma microcavity dị elu na obosara ikuku dị warara (Foto 2). Usoro a na-enyekwa nghọta ọhụrụ na mmepe nke obere lasers, obere ọnụ ala dabere na ihe ndị ọzọ na-emepụta semiconductor.
Foto nke 2. Usoro nke isi iyi laser sub-micron site na iji excitonic polarizons
Song Jiepeng, nwa akwụkwọ Zhibo nke afọ 2020 site na Ụlọ Akwụkwọ Sayensị na Injinịa nke Mahadum Peking, bụ onye mbụ dere akwụkwọ ahụ, Mahadum Peking bụkwa nkeji mbụ nke akwụkwọ ahụ. Zhang Qing na Xiong Qihua, prọfesọ nke Fizik na Mahadum Tsinghua, bụ ndị dere ya. National Natural Science Foundation of China na Beijing Science Foundation for Outstanding Young People kwadoro ọrụ ahụ.
Oge ozi: Sep-12-2023