Fig. 11

1D branched microstructures for optical waveguides. a-b Molecular structures of Alq₃ and DAAQ; bright-field SEM image of the Alq₃ − DAAQ dendritic heterostructure. The scale bars: 5 μm and 1 μm, respectively. c Schematic illustration of the experimental setup for polarized excitation. d The variation of the emission intensities from Alq₃ micro-ribbon and DAAQ microwire taken by exciting the middle area 1 at different polarization angles (θ = 0 ~ 360°). Scale bar: 20 μm. And polarization-angle-dependent PL intensity of the branch channel 2 and the trunk channel 3 of the Alq₃-DAAQ NWHJ-based was excited with a linearly polarized laser beam at input1. e Schematic illustration of the measurement setup for polarized excitation. f The variation of the emission intensity from COPV micro-ribbon and the tips of branches as a function of polarization angle (θ = 0 ~ 360°). The scale bar is 5 μm. g PL intensity of the BNwHs taken by exciting the COPV ribbon at different polarization angles. h Microscope images of the o-BCB homo-structure excited at different points by a 375 nm laser. The scale bar is 5 μm. a-d Reprinted with permission from ref. [30] Copyright 2012, American Chemical Society. e-g Reprinted with permission from ref. [47] Copyright 2014, American Chemical Society. h Reprinted with permission from ref. [48] Copyright 2018, American Chemical Society