A Broadband, Multiplexed‐Visible‐Light‐Transport in Composite Flexible‐Organic‐Crystal Waveguide

Abstract

We report the construction of an organic crystal multiplexer using three chemically and optically different acicular, flexible organic crystals for a broadband, visible light signal transportation. The mechanical integration of a highly flexible crystal waveguide of (Z)-2-(3,5-bis(trifluoromethyl)phenyl)-3-(7-methoxybenzo-[c][1,2,5]thiadiazol-4-yl)acrylonitrile (BTD2CF 3 ) displaying bright yellow (λ 1 ) fluorescence with blue-emitting (λ 2 ) BPP and cyan emitting (λ 3 ) DBA crystals using AFM-tip provides a composite organic crystal multiplexer. The constructed hybrid single crystal multiplexer effectively transduces three optical signals (λ 1 + λ 2 + λ 3 ) covering the 420-750 nm region as a composite output signal. The presented proof-of-principle experiment demonstrates the real potential of organic flexible crystal waveguides for visible light communication technologies.

Repair and Splicing of Centimeter‐Size Organic Crystalline Optical Waveguides

“…Moreover, the integration of organic crystals having complementary fluorescence spectra provides access to crystalline OWG bundles that emit almost colorless output, an approach that can be used for mixing light to generate white light (Figure 2i). Compared to the organic wavelength division multiplexer reported recently, [ 47 ] from a practical perspective, the approach for producing crystalline OWG bundles reported here appears to be simpler and more efficient, and we believe it also is more suitable for large‐size crystals relative to microcrystals.…”

Stimuli-responsive flexible organic crystals

“…79,88–105 In addition, mechanically reconfigurable organic crystals could also be used for amplifying spontaneous emission and in polarization rotators, which broaden their applications in different scenarios. 31,106–115…”

“…2, 2f ; 14e–g ). 114 This WDM merges three narrow-band optical signals to transmit a broadband visible light signal. The optical emission bandwidths of 1n , 1d and 2f crystals are ≈420–700 nm ( λ 1—blue), 445–705 nm ( λ 2—cyan), 480–755 nm ( λ 3—yellow), respectively.…”

“…79,[88][89][90][91][92][93][94][95][96][97][98][99][100][101][102][103][104][105] In addition, mechanically reconfigurable organic crystals could also be used for amplifying spontaneous emission and in polarization rotators, which broaden their applications in different scenarios. 31,[106][107][108][109][110][111][112][113][114][115] Huang et al reported the first case of elastic self-doping organic single crystals (1o) that exhibit flexible optical waveguides and amplified spontaneous emission properties (Fig. 6a-g).…”

“…14c and d). 108 By extending the concept of reconfigurable photonic integrated circuits, they successfully integrated two mechanically different crystals with complementary optical properties to fabricate circuits 114 This WDM merges three narrow-band optical signals to transmit a broadband visible light signal. The optical emission bandwidths of 1n, 1d and 2f crystals are E420-700 nm (l1-blue), 445-705 nm (l2-cyan), 480-755 nm (l3-yellow), respectively.…”