Ua ʻike ke Kulanui ʻo Peking i kahi perovskite hoʻomaukumu laserʻoi aku ka liʻiliʻi ma mua o 1 micron kuea
He mea nui e kūkulu i kahi kumu laser hoʻomau me kahi ʻāpana hāmeʻa ma lalo o 1μm2 e hoʻokō ai i ke koi hoʻohana ikehu haʻahaʻa o ka hoʻopili optical on-chip (<10 fJ bit-1). Eia nō naʻe, i ka emi ʻana o ka nui o ka hāmeʻa, piʻi nui ka pohō optical a me nā mea, no laila he mea paʻakikī loa ka hoʻokō ʻana i ka nui o ka hāmeʻa sub-micron a me ka hoʻomau ʻana o ka pumping optical o nā kumu laser. I nā makahiki i hala iho nei, ua loaʻa i nā mea halide perovskite ka nānā nui ʻana ma ke kahua o nā lasers hoʻomau optically pumped ma muli o ko lākou loaʻa optical kiʻekiʻe a me nā waiwai polariton exciton kū hoʻokahi. ʻOi aku ka nui o ka ʻāpana hāmeʻa o nā kumu laser perovskite hoʻomau i hōʻike ʻia a hiki i kēia manawa ma mua o 10μm2, a pono nā kumu laser submicron i ka mālamalama pulsed me ka nui o ka ikehu pump kiʻekiʻe e hoʻoulu ai.
I ka pane ʻana i kēia pilikia, ua hoʻomākaukau pono ka hui noiʻi o Zhang Qing mai ke Kula o ka ʻEpekema Mea a me ka ʻenekinia o ke Kulanui ʻo Peking i nā mea kristal hoʻokahi perovskite submicron kiʻekiʻe e hoʻokō i nā kumu laser pumping optical hoʻomau me kahi ʻāpana hāmeʻa e like me 0.65μm2. I ka manawa like, ua hōʻike ʻia ka photon. Ua hoʻomaopopo hohonu ʻia ke ʻano o ka exciton polariton i loko o ke kaʻina hana lasing optically pumped submicron, kahi e hāʻawi ai i kahi manaʻo hou no ka hoʻomohala ʻana i nā lasers semiconductor paepae haʻahaʻa liʻiliʻi. ʻO nā hopena o ke aʻo ʻana, i kapa ʻia ʻo "Continuous Wave Pumped Perovskite Lasers with Device Area Below 1 μm2," i paʻi ʻia ma Advanced Materials.
Ma kēia hana, ua hoʻomākaukau ʻia ka pepa micron kristal hoʻokahi perovskite CsPbBr3 inorganic ma luna o ka substrate sapphire ma o ka hoʻokaʻawale ʻana o ka mahu kemika. Ua ʻike ʻia ʻo ka pilina ikaika o nā excitons perovskite me nā photons microcavity pā leo ma ka mahana o ka lumi i hopena i ka hoʻokumu ʻia ʻana o ka polariton excitonic. Ma o kahi moʻo o nā hōʻike, e like me ka ikaika linear a nonlinear emission, ka laulā laina haiki, ka hoʻololi polarization emission a me ka hoʻololi coherence spatial ma ka paepae, ua hōʻoia ʻia ka fluorescence lase hoʻomau optically pumped o ka kristal hoʻokahi CsPbBr3 sub-micron-sized, a ʻo ka wahi o ka hāmeʻa he haʻahaʻa e like me 0.65μm2. I ka manawa like, ua ʻike ʻia ua like ka paepae o ke kumu laser submicron me ko ke kumu laser nui, a hiki ke haʻahaʻa (Kiʻi 1).
Kiʻi 1. Submicron CsPbBr3 i hoʻopaʻa ʻia me ka optical hoʻomaukumu kukui laser
Eia kekahi, ke noiʻi nei kēia hana ma ke ʻano hoʻokolohua a me ke kumumanaʻo, a hōʻike i ke ʻano o nā excitons polarized exciton i ka hoʻokō ʻana o nā kumu laser hoʻomau submicron. ʻO ka hoʻonui ʻia ʻana o ka photon-exciton coupling i nā perovskites submicron e hopena i ka hoʻonui nui ʻana o ka index refractive hui i kahi o 80, kahi e hoʻonui nui ai i ka loaʻa mode e uku no ka pohō mode. Hoʻopuka pū kēia i kahi kumu laser submicron perovskite me kahi kumu maikaʻi microcavity kiʻekiʻe aʻe a me kahi linewidth hoʻokuʻu haiki (Kiʻi 2). Hāʻawi pū ka mīkini i nā ʻike hou i ka hoʻomohala ʻana o nā lasers liʻiliʻi, haʻahaʻa-paepae e pili ana i nā mea semiconductor ʻē aʻe.
Kiʻi 2. ʻAno hana o ke kumu laser sub-micron me ka hoʻohana ʻana i nā polarizons excitonic
ʻO Song Jiepeng, he haumāna Zhibo o 2020 mai ke Kula o ka ʻEpekema Mea a me ka ʻenekinia o ke Kulanui ʻo Peking, ʻo ia ka mea kākau mua o ka pepa, a ʻo ke Kulanui ʻo Peking ka ʻāpana mua o ka pepa. ʻO Zhang Qing lāua ʻo Xiong Qihua, polopeka o ke Physics ma ke Kulanui ʻo Tsinghua, nā mea kākau like. Ua kākoʻo ʻia ka hana e ka National Natural Science Foundation of China a me ka Beijing Science Foundation for Outstanding Young People.
Ka manawa hoʻouna: Sep-12-2023