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Molecular crystals and liquid crystals science technology. Section A, Molecular crystals and liquid crystals/Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals

Multiple Spectral Hole Burning at Room Temperature with Dye-Molecules-Doped Spherical Dielectric Microparticles

Lingbing Chen, Van Wang, Yong‐Le Pan, Youyuan Zhao, Fuming Li, Xiaojun Xu, Shoukuan Fu

Published Dec 1, 1996• 0 citations
Publisher

Abstract

Multiple spectral hole burning at room temperature was realized for Nile blue molecules-doped spherical polymeric microparticles based on morphology-dependent resonances. Hole parameters, sidehole generation, dynamical process of hole formation and hole burning mechanism were studied.
DOI
10.1080/10587259608042746

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Persistent spectral hole burning with multiplicity was realized at room temperature for Nile blue molecules-doped polymeric dielectric spherical microparticles based on morphology-dependent resonances. Hole parameters depending on burning conditions were studied. Dynamical characteristic behavior of hole formation was measured and analyzed with a model based on rate equations. The effective hole formation rate was obtained by simulation. Photophysical and photochemical mechanisms of the room temperature hole burning for this system was discussed.
Recently, photonic atoms (dielectric microspheres) have enjoyed the attention of the optical spectroscopy community. A variety of linear and nonlinear optical processes have been observed in liquid microdroplets. But solid state photonic devices using these properties are scarce. A first of these applications is the room temperature microparticle hole-burning memory. New applications can be envisioned if microparticle resonances can be coupled to traveling waves in optical fibers. In this paper we demonstrate the excitation of narrow morphology dependent resonances of microparticles placed on an optical fiber. Furthermore we reveal a model for this process which describes the coupling efficiency in terms of the geometrical and material properties of the microparticle-fiber system.
En route to real molecular electronics the “spectral hole burners” among physical chemists have come a long way. Two developments which foster these ambitions are discussed herein: 1. For the first time holes with sufficient thermal stability could be burned in experiments at room temperature by using the 4f electron transitions of Sm in substitutionally disordered microcrystals of SrFCl0.5Br0.5 or Mg0.5Sr0.5FCl0.5 doped with Sm2+. 2. The manipulation of single molecules necessary for real molecular electronics was possible on a perylene‐doped polyethylene film. At T = 1.5 K, spectral hole burning could be carried out selectively several times in succession with a single perylene molecule.