Fig. 6
From: Optical waveguides based on one-dimensional organic crystals
1D solid-state microstructures for flexible optical waveguides. a1-a6 Illustration of the mechanical test of the crystal. b Graphical representation of bending process of elastic crystal. Optical waveguide properties of the identical crystallin straight shape c and in bent shape d. The scale bar is 1 mm. e-f PL spectra recorded upon excitation of the straight shape f and bent shape g at different positions. g Illustration of the crystal fixed on a metal pin and mechanical test. h1 Straight crystal 1: PL images obtained by exciting an identical microrod at different positions. Scale bar: 1 mm. h2 Bent crystal 1 with 1.9% strain: PL images obtained by exciting an identical microrod at different positions. Scale bar: 1 mm. i1 Straight crystal: PL images obtained by exciting an identical microrod at different positions. Scale bar: 1 mm. i2 Bent crystal with 1.5% strain: PL images obtained by exciting an identical microrod at different positions. Scale bar: 1 mm. g Schematic illustration of cutting and bending/straightening of microrod. K Table depicts various input and output positions. a1-e Reprinted with permission from ref. [38] Copyright 2018, Wiley-VCH. d1-i Reprinted with permission from ref. [37] Copyright 2018, Wiley-VCH. g-k Reprinted with permission from ref. [39] Copyright 2020, Wiley-VCH