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Modal Birefringence: Tunable Modal Birefringence in a Low‐Loss Van Der Waals Waveguide (Adv. Mater. 27/2019)
Author(s) -
Hu Debo,
Chen Ke,
Chen Xinzhong,
Guo Xiangdong,
Liu Mengkun,
Dai Qing
Publication year - 2019
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201970198
Subject(s) - birefringence , materials science , optics , van der waals force , degenerate energy levels , waveguide , modal , optoelectronics , physics , quantum mechanics , molecule , polymer chemistry
In article number 1807788, Mengkun Liu, Qing Dai, and co‐workers use a metal‐coated atomic force microscope tip with a beam of near‐infrared light focused on its apex to launch and image the orthogonally polarized ordinary and extraordinary waveguide modes propagating in MoS 2 . In a MoS 2 crystal with a suitable thickness, the ordinary and extraordinary modes can be degenerate in momentum space and propagate with the same phase velocity in real space.