Nonlinearity of the refractive index due to an excitonic molecule resonance state in CdS

We report the observation of an intensity-dependent refractive-index nonlinearity in CdS due to a resonance state where an excitonic molecule is created by induced absorption of light. The refractive index n as a function of the incident laser photon energy E is measured directly by light refraction...

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Bibliographic Details
Published in:IEEE journal of quantum electronics 1986-08, Vol.22 (8), p.1539-1542
Main Authors: Baumert, R., Broser, I., Buschick, K.
Format: Article
Language:English
Subjects:
Absorption
Applied sciences
Crystalline materials
Dielectric materials
Dielectric measurements
Energy measurement
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Nonlinear optics
Optical bistability
Optical refraction
Optics
Other techniques and industries
Photonic crystals
Physics
Refractive index
Resonance
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Summary:We report the observation of an intensity-dependent refractive-index nonlinearity in CdS due to a resonance state where an excitonic molecule is created by induced absorption of light. The refractive index n as a function of the incident laser photon energy E is measured directly by light refraction in thin crystal prisms. A renormalized dielectric function describes the measured n(E) spectra well. This strong refractive-index nonlinearity is well suited to produce an optical bistability and to further strengthen the evidence of CdS to be an important material for laser-induced dynamic gratings.
ISSN:0018-9197
1558-1713
DOI:10.1109/JQE.1986.1073125