Organic Branched Heterostructures with Optical Interconnects for Photonic Barcodes

Abstract

Optical interconnects exhibit superior potential in the precise regulation of photon transmission for organic photonic circuits. However, the rational design of well-defined organic heterostructures toward active optoelectronics remains challenging. Herein, we designed organic branched heterostructures (OBHs) with accurate spatial organization for optical interconnection. Notably, the precise regulation of OBHs has been controllably achieved including the trunk morphologies and the branched microwire number. Significantly, these as-prepared OBHs inherently exhibit the multichannel coupling outputs and the excitation position-dependent waveguide characteristics, leading to various outcoupling signals with tunable intensity and emission colors. The optical interconnects are realized due to the occurrence of exciton conversion and photon propagation between branch and trunk at the heterojunction, benefiting the application possibilities of two-dimensional (2D) optical barcodes.

Visualizing the interfacial-layer-based epitaxial growth process toward organic core-shell architectures

“…Notably, the BTP and BTB cocrystals demonstrated high chemical and structural compatibility (Supplementary Figs. 6 , 7 ), which is conducive to the doping process or heterogeneous nucleation for the fine synthesis of OHTs 5 , 13 , 27 . When increasing the doping ratio of BTB from 0% to 10%, the prepared BTP microwires display a charming emission-color evolution from green to yellow and further to red (Supplementary Fig.…”

“…The BTB and BTP cocrystals hold analogous molecular parking along the growth direction driven by the CT interaction. Combined with the low lattice mismatch ratio ( f ) of 0.8% ( = 9.15 Å ≈ = 9.22 Å, Supplementary Table 1 ), their high chemical and structural compatibility facilities facet-selective heteronucleation and epitaxial-growth for the construction of OHTs 13 , 27 . These results indicate that the BTB was firstly self-assembled into seeded microwires acting as a core part via CT interaction along the [010] direction.…”

Carbon Nano-onions as Saturable Absorbers for Pulsed Fiber Lasers

“…Over the past few decades, ultrafast fiber lasers have earned extensive studies for their wide applications in biology, medicine, national defense, materials processing, and mid-infrared laser sources. − The passively Q-switched or mode-locked technique is the main mechanism to generate ultrafast pulses, in which a saturable absorber (SA) plays a crucial role. In recent years, one-dimensional materials (e.g., carbon nanotubes and silver nanowires), two-dimensional materials (e.g., graphene and transition metal dichalcogenides), and three-dimensional materials (e.g., metal–organic frameworks) have been extensively investigated due to their advantages of high third-order nonlinear susceptibility, ultrafast recovery time, and tailored electrical and optical properties. − Compared with conventional nonlinear materials, carbon-based materials present obvious superiority in terms of a wide modulation bandwidth and ultrafast recovery time. However, there are still some challenges in the existing carbon-based materials.…”