The saturation limit to picosecond, induced absorption in dyes

S. Hughes; G. Spruce; B. S. Wherrett; K. R. Welford; A. D. Lloyd

The saturation limit to picosecond, induced absorption in dyes

S. Hughes, G. Spruce, B. S. Wherrett, K. R. Welford, A. D. Lloyd

School of Engineering & Physical Sciences

Research output: Contribution to journal › Article › peer-review

55 Citations (Scopus)

Abstract

The increase in transmission coefficient at high fluences, following low-fluence reverse saturable absorption (induced absorption), is demonstrated for the tricarbocyanine dye, HITCI. This novel effect is explained in terms of a modified three-level model of the singlet states. The absorption cross-section at 532 nm of the first excited state is determined to be 4.8x10^-16 cm², 29 times that of the ground state. We find the lifetime of the first excited state to be 1.5 ns and that of the second excited state to be of the order of 8 ps. © 1993.

Original language	English
Pages (from-to)	113-117
Number of pages	5
Journal	Optics Communications
Volume	100
Issue number	1-4
Publication status	Published - 1 Jul 1993

Cite this

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title = "The saturation limit to picosecond, induced absorption in dyes",

abstract = "The increase in transmission coefficient at high fluences, following low-fluence reverse saturable absorption (induced absorption), is demonstrated for the tricarbocyanine dye, HITCI. This novel effect is explained in terms of a modified three-level model of the singlet states. The absorption cross-section at 532 nm of the first excited state is determined to be 4.8x10-16 cm2, 29 times that of the ground state. We find the lifetime of the first excited state to be 1.5 ns and that of the second excited state to be of the order of 8 ps. {\textcopyright} 1993.",

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AU - Hughes, S.

AU - Spruce, G.

AU - Wherrett, B. S.

AU - Welford, K. R.

AU - Lloyd, A. D.

PY - 1993/7/1

Y1 - 1993/7/1

N2 - The increase in transmission coefficient at high fluences, following low-fluence reverse saturable absorption (induced absorption), is demonstrated for the tricarbocyanine dye, HITCI. This novel effect is explained in terms of a modified three-level model of the singlet states. The absorption cross-section at 532 nm of the first excited state is determined to be 4.8x10-16 cm2, 29 times that of the ground state. We find the lifetime of the first excited state to be 1.5 ns and that of the second excited state to be of the order of 8 ps. © 1993.

AB - The increase in transmission coefficient at high fluences, following low-fluence reverse saturable absorption (induced absorption), is demonstrated for the tricarbocyanine dye, HITCI. This novel effect is explained in terms of a modified three-level model of the singlet states. The absorption cross-section at 532 nm of the first excited state is determined to be 4.8x10-16 cm2, 29 times that of the ground state. We find the lifetime of the first excited state to be 1.5 ns and that of the second excited state to be of the order of 8 ps. © 1993.

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M3 - Article

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SP - 113

EP - 117

JO - Optics Communications

JF - Optics Communications

IS - 1-4

ER -

The saturation limit to picosecond, induced absorption in dyes

Abstract

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