【摘 要】
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Due to the large exciton binding energy,two-dimensional (2D) transition metal dichalcogenides (TMDCs) provide an ideal platform for studying excitonic states an
【机 构】
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Key Laboratory for Micro-Nano Physics and Technology of Hunan Province,School of Physics and Electro
论文部分内容阅读
Due to the large exciton binding energy,two-dimensional (2D) transition metal dichalcogenides (TMDCs) provide an ideal platform for studying excitonic states and related photonics and optoelectronics.Polarization states lead to distinct light-matter interactions which are of great importance for device applications.In this work,we study polarized photo-luminescence spectra from intralayer exciton and indirect exciton in WS2 and WSe2 atomic layers,and interlayer exciton in WS2/WSe2 heterostructures by radially and azimuthally polarized cylindrical vector laser beams.We demonstrated the same in-plane and out-of-plane polarization behavior from the intralayer and indirect exciton.Moreover,with these two laser modes,we obtained interlayer exciton in WS2/WSe2 heterostructures with stronger out-of-plane polarization,due to the formation of vertical electric dipole moment.
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