Net gain in photorefractive InP:Fe at λ=1.32 μm without an applied field

J. Strait; J. D. Reed; A. Saunders; G. C. Valley; M. B. Klein

doi:10.1063/1.103522

Net gain in photorefractive InP:Fe at λ=1.32 μm without an applied field

J. Strait, J. D. Reed, A. Saunders, G. C. Valley, M. B. Klein

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Abstract

We have observed two-beam coupling gain (0.273 cm^-1) that exceeds absorption (0.145 cm^-1) in InP:Fe without applying an external field at λ=1.32 μm. Measurements of the gain coefficient as a function of grating spacing fit the photorefractive theory for simultaneous electron-hole transport, with the effective density of traps N_E = (3.86 ± 1.1)N_E=(3.86±1.1)× 10¹ ⁵ cm^-3 and ξ, the factor that accounts for competition between electrons and holes, equaling -0.729±0.026. Absorption measurements, combined with the photoionization cross sections of electrons and holes, confirm these results. The agreement between theory and experiment suggests how to choose impurity concentrations that optimize net gain.

Original language	English
Pages (from-to)	951-953
Number of pages	3
Journal	Applied Physics Letters
Volume	57
Issue number	10
DOIs	https://doi.org/10.1063/1.103522
State	Published - 1990
Externally published	Yes

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title = "Net gain in photorefractive InP:Fe at λ=1.32 μm without an applied field",

abstract = "We have observed two-beam coupling gain (0.273 cm-1) that exceeds absorption (0.145 cm-1) in InP:Fe without applying an external field at λ=1.32 μm. Measurements of the gain coefficient as a function of grating spacing fit the photorefractive theory for simultaneous electron-hole transport, with the effective density of traps NE = (3.86 ± 1.1)NE=(3.86±1.1)× 101 5 cm-3 and ξ, the factor that accounts for competition between electrons and holes, equaling -0.729±0.026. Absorption measurements, combined with the photoionization cross sections of electrons and holes, confirm these results. The agreement between theory and experiment suggests how to choose impurity concentrations that optimize net gain.",

author = "J. Strait and Reed, \{J. D.\} and A. Saunders and Valley, \{G. C.\} and Klein, \{M. B.\}",

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journal = "Applied Physics Letters",

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T1 - Net gain in photorefractive InP:Fe at λ=1.32 μm without an applied field

AU - Strait, J.

AU - Reed, J. D.

AU - Saunders, A.

AU - Valley, G. C.

AU - Klein, M. B.

PY - 1990

Y1 - 1990

N2 - We have observed two-beam coupling gain (0.273 cm-1) that exceeds absorption (0.145 cm-1) in InP:Fe without applying an external field at λ=1.32 μm. Measurements of the gain coefficient as a function of grating spacing fit the photorefractive theory for simultaneous electron-hole transport, with the effective density of traps NE = (3.86 ± 1.1)NE=(3.86±1.1)× 101 5 cm-3 and ξ, the factor that accounts for competition between electrons and holes, equaling -0.729±0.026. Absorption measurements, combined with the photoionization cross sections of electrons and holes, confirm these results. The agreement between theory and experiment suggests how to choose impurity concentrations that optimize net gain.

AB - We have observed two-beam coupling gain (0.273 cm-1) that exceeds absorption (0.145 cm-1) in InP:Fe without applying an external field at λ=1.32 μm. Measurements of the gain coefficient as a function of grating spacing fit the photorefractive theory for simultaneous electron-hole transport, with the effective density of traps NE = (3.86 ± 1.1)NE=(3.86±1.1)× 101 5 cm-3 and ξ, the factor that accounts for competition between electrons and holes, equaling -0.729±0.026. Absorption measurements, combined with the photoionization cross sections of electrons and holes, confirm these results. The agreement between theory and experiment suggests how to choose impurity concentrations that optimize net gain.

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DO - 10.1063/1.103522

M3 - Article

AN - SCOPUS:11644255420

SN - 0003-6951

VL - 57

SP - 951

EP - 953

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 10

ER -

Net gain in photorefractive InP:Fe at λ=1.32 μm without an applied field

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