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Physical review. B, Condensed matter

Persistent hole burning in multiple-scattering optical media

Makoto Tomita, Tetsu Ito, Satoshi Hattori

Published Oct 22, 2001• 13 citations
Publisher

Abstract

We analyzed the shape and width of room-temperature persistent holes in photoreactive and multiple-scattering media in frequency and wave-vector domains. The shape and width of holes depend on sample thickness, transport mean free path, geometrical configuration, and absorption lengths. The measurements of the angular dependence of hole burning in a disordered ${\mathrm{CdS}}_{0.85}{\mathrm{Se}}_{0.15}$- doped glass sample were in quantitative agreement with theory.

DOI
10.1103/physrevb.64.180202

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Optics Letters•Oct 1, 1993•166 citations
We analyzed the shape and width of room-temperature persistent holes in photoreactive and multiple-scattering media in frequency and wave-vector domains. The shape and width of holes depend on sample thickness, transport mean free path, geometrical configuration, and absorption lengths. The measurements of the angular dependence of hole burning in a disordered CdS0.85Se0.15{\mathrm{CdS}}_{0.85}{\mathrm{Se}}_{0.15}CdS0.85​Se0.15​- doped glass sample were in quantitative agreement with theory.
We investigated the time development of persistent hole burning in photoreactive and multiple-scattering media. In this hole burning, a writing laser beam recodes the volume speckle pattern inside the medium through the photoreactive process, and then the luminescence intensity excited by a reading beam is measured as a function of the frequency or wave vector difference between the writing and reading beams. The time development reflects the statistics of the intensity fluctuations in the speckle inside the medium. One of the striking results is that the maximum hole depth is approximately 0.26 . We distinguish three types of samples according to the geometric configurations and the photoreactive processes and discuss the hole shape, hole width, and the depth during time development. Hole burning experiments were also performed using a spiropyran derivative photochromic dye. The experimental results showed good agreement with the theory.
Persistent spectral hole burning is observed in Sm(2+)-doped glasses at room temperature. The holes are burned in the (7)F(0) ? (5)D(0), (5)D(1) lines of the Sm(2+) ions in three kinds of fluoride glass. The dependence of the burning efficiency on the sample and on the burning intensity is measured. The intensity dependence is approximately linear, and no antihole is observed around the burned hole. The hole-burning mechanism is discussed. The temperature dependence of the homogeneous width is also measured.
We reported the first observation of room-temperature persistent spectral hole burning in Sm2+-doped fluoride glass in the last conference [1]. Room-temperature hole burning had been also observed in Sm2+-doped crystals [2]. We found considerable differences in the hole-burning characteristics between Sm2+-doped glasses and Sm2+-doped crystals: The burning-laser-intensity dependence is approximately linear, and no antihole is observed around the hole burned in Sm2+-doped glasses [3]. More detailed experimental studies are needed to clarify the mechanism of the hole burning in this glass and to explore more efficient hole-burning systems. In this paper, we report several experimental results related to wavelength dependence of the hole burning process.