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Springer proceedings in physics

Light-Induced-Desorption: A New Mechanism for Bistability in Integrated Optical Devices

W. Lukosz, V. Briguet

Published Jan 1, 1986• 1 citation
Publisher
DOI
10.1007/978-3-642-46580-2_25

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We have demonstrated a new mechanism for bistability in integrated optics, viz., light-induced-desorption of molecules from the waveguide surface by which the effective guide index N is changed. Bistability occurs if the desorption rate depends linearly on the incoupled power P' in an input coupler device (see Fig.1), and on the intracavity power in an IO Fabry Perot or ring resonator. This follows theoretically from an analysis analogous to that of the bistable radiation pressure driven waveguide pendulum.1

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Light-induced atomic desorption under different types of illumination

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We studied the light-induced atomic desorption (LIAD) at different geometries and homogeneities of cell illumination. An original system for homogeneous illumination of the cells was developed and the Rb D2 line absorption spectra in several uncoated and coated cells were compared without illumination, with single-side illumination and with homogeneous illumination. The transmission as a function of the illumination intensity and the tuning direction was measured. The absorption coefficients with and without illumination of the stem were compared. The system developed for homogeneous illumination increases the efficiency of the LIAD, enables the investigation of LIAD without lateral diffusion, prevents cluster formation and reduces the influence of the stem. A good knowledge of the factors influencing the alkali atom spectra will be useful not only for the development of new LIAD-loaded atomic devices and their miniaturization, but also for the study of atom-dielectric surface interactions and the development of new all-optical methods for surface and coating diagnostics.

Journal of Physics Conference Series•May 15, 2014•5 citations
We have demonstrated a new mechanism for bistability in integrated optics, viz., light-induced-desorption of molecules from the waveguide surface by which the effective guide index N is changed. Bistability occurs if the desorption rate depends linearly on the incoupled power P' in an input coupler device (see Fig.1), and on the intracavity power in an IO Fabry Perot or ring resonator. This follows theoretically from an analysis analogous to that of the bistable radiation pressure driven waveguide pendulum.1
Abstract The influence of Light Induced Atomic Desorption (LIAD) on the potassium D2 line magneto-optical resonances in uncoated buffer-gas optical cell is investigated. LIAD effect reduces the drawbacks of conventional heating for achieving high atomic density that is essential for many spectroscopy-based applications. Another feature of LIAD is the impact on the dwelling time of the atoms when colliding with the surface of the cell. In this work we investigate LIAD from point of view to distinguish the influence of LIAD on the atomic density from the dwelling time as well as to control and improve the parameters of magneto-optical resonances in potassium vapor. The results are interesting for development of new precise optical sensors and devices for various applications.
We studied the light-induced atomic desorption (LIAD) at different geometries and homogeneities of cell illumination. An original system for homogeneous illumination of the cells was developed and the Rb D2 line absorption spectra in several uncoated and coated cells were compared without illumination, with single-side illumination and with homogeneous illumination. The transmission as a function of the illumination intensity and the tuning direction was measured. The absorption coefficients with and without illumination of the stem were compared. The system developed for homogeneous illumination increases the efficiency of the LIAD, enables the investigation of LIAD without lateral diffusion, prevents cluster formation and reduces the influence of the stem. A good knowledge of the factors influencing the alkali atom spectra will be useful not only for the development of new LIAD-loaded atomic devices and their miniaturization, but also for the study of atom-dielectric surface interactions and the development of new all-optical methods for surface and coating diagnostics.