Subpicosecond Accumulated Photon Echo with Incoherent Light
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- Asaka Shuji
- Department of Physics, Faculty of Science, Kyoto University
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- Nakatsuka Hiroki
- Department of Physics, Faculty of Science, Kyoto University
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- Fujiwara Masahiro
- Department of Physics, Faculty of Science, Kyoto University
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- Matsuoka Masahiro
- Department of Physics, Faculty of Science, Kyoto University
Bibliographic Information
- Other Title
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- Subpicosecond Accumulated Photon Echo w
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Description
An analytic theory and experimental studies of the accumulated photon echo is presented. We define a temporal correlation function \ ildeG of the excitation field E(t) as \ ildeG(τ, t)=(1⁄T1) ∫0∞ dt′E(t−t′)E(t−t′−τ)·exp (−t′⁄T1), where T1 is the population relaxation time of the sample, and call the width of \ ildeG with respect to τ a temporal correlation time \ ildeτc(t). It is proved that the echo intensity is written by the temporal correlation functions when (1) T1 and the duration of the excitation light τp are much longer than \ ildeτc(t) in order to make the function \ ildeG(τ, t) well-defined, (2) T1 and τp are much longer than the homogeneous dephasing time T2, and (3) one can find a time interval Δt such that \ ildeG(τ, t) does not change much between t and t+Δt, where Δt>>\ ildeτc. Then we can show that the time resolution of the accumulated photon echo is determined by the averaged \ ildeτc(t) over an interval of the integration of the echo signal. This discussion is valid for any excitation source if the above conditions are satisfied, and applies to almost all cases of the practical accumulated photon echo experiment. A discussion is also made on the spurious spike on the echo decay curve near zero delay time that appeared in an experiment with a high time resolution in Nd3+-doped silicate glass. It is shown that the most probable cause for this spike is uncorrelated inhomogeneous broadenings of the resonant lines of neodymium ions.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 56 (6), 2007-2023, 1987
THE PHYSICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390282679163053952
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- NII Article ID
- 110001960454
- 130003899488
- 210000093369
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- NII Book ID
- AA00704814
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- BIBCODE
- 1987JPSJ...56.2007A
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- ISSN
- 13474073
- 00319015
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- NDL BIB ID
- 3139513
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed