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Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

Microparticle-based persistent spectral hole-burning memory at room temperature

Lingbing Chen, Yan Wang, Yong‐Le Pan, Youyuan Zhao, Fuming Li, Jianhua Hu, Xuliang Lü, Shoukuan Fu

Published Sep 3, 1996• 0 citations
Publisher

Abstract

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.

DOI
10.1117/12.248696

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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.
Persistent spectral hole burning (PSHB) was performed for several porphyrin molecules imbedded in polymer hosts and rare-earth ion Sm2+ doped in BaFCl0.5Br0.5 matrix. Power saturation and broadening effects for hole depth and width were observed. The dynamical process of hole formation was measured and explanation by population rate equations was given. Quantum efficiency of photochemical hole burning was investigated. For BaFCl0.5Br0.5:Sm2+ the capacity of data storage was estimated according to the result of multiple hole burning.
Persistent spectral hole-burning is reported for the organic guest molecule 5, 10, 15, 20-tetra-(p-methoxyphenyl) porphin (TMP) imbeded in polymethylmethacrylate (PMMA) host at liquid helium temperature. The effects for power saturation of hole depth and power broadening of hole width were observed. Hole growth dynamics was investigated and the process of light induced hole erasing was measured. Theoretical fits to the experimental data were carried out and hole burning mechanism of the system was discussed.