Optical Waveguide Self-Assembled from Organic Dye Molecules in Solution

Abstract

Fiber-shaped H-aggregates with lengths of up to 300 microm are synthesized by self-assembly of thiacyanine (TC) dye molecules in solution. Photoluminescence (PL) images and spatially resolved PL spectra of the fibers that are transferred onto a glass substrate reveal that the fibers act as single-mode optical waveguides that propagate PL in the range of 520 to 560 nm over 250 microm without any loss.

Organic solid‐state integrated amplifiers and lasers

“…They are also very useful in integrated circuits as they can provide nano-macro interface thanks to their capability of connecting macroscale and nanoscale photonic and electronic components, respec-REVIEW ARTICLE 449 tively. The fabrication technology of these structures is quite mature and there is a wealth of methods that have been reported to produce high-quality nanofibers, including melt assisted template wetting [303], electrospinning [304,305], soft lithography [306], dip-pen lithography [307], absorbentassisted plasma vapour deposition [308], vapour deposition polymerization (VDP) followed by dipping in organic dye solutions [309], self-assembly and solution chemistry using suitable templates [310], vacuum sublimation [311] and drawing directy from polymer solution individually or in parallel using one or a larger number of AFM tips respectively [312]. Figure 40 shows a SEM image of PFO nanofibers as produced by the melt-assisted template wetting method [313].…”

Molecular Arrangements in Two-Dimensional J-Aggregate Monolayers of Cyanine Dyes

“…via the formation of delocalized Frenkel-type exciton states in stacked adjacent coherently coupled chromophores. [1][2][3] Due to the unique optoelectronic properties, J-and H-aggregates of cyanine dyes have been used long ago as light sensitizers in silver halides color photography [4] and widely studied recently as components for nonlinear optical and photorefractive devices, [5] cavity QED structures, [6] single-mode optical waveguides, [7] lightemitting dopants to electron-hole conducting polymer layers in polymer OLEDs, [8] light-sensitizing agents in complexes with quantum-dots [9] and for biosensing applications. [10] At the nanometer scale, the lateral slippage of transitional dipoles of adjacent π-stacked molecules takes place in J-aggregates and a small slip angle α is formed ( Figure 1a).…”

Solution-processed, high-performance n-channel organic microwire transistors

“…To date, however, very few solutionprocessable, air-stable organic n-channel semiconductors matching the performance of amorphous silicon (a-Si) ( Ն 0.1 cm 2 /Vs) have been reported (4)(5)(6)(7)(8). Organic semiconductor nano/microwires (NWs/MWs) have recently emerged as promising building blocks for various electronic and optical applications such as light-emitting diodes (LEDs) (9), field-effect transistors (FETs) (10), photoswitches (11), vapor sensors (12), solar cells (13), nanoscale lasers (14), optical waveguides (15), and memory devices (16). These unique materials combine the high-performance of singlecrystalline structures with solution-processability by dispersion (17,18).…”