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Rewritable photonic circuits
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color) Scheme of the experimental setup. (a) The controlled infiltration task is accomplished by a micro infiltration system and monitored with a CLSM that can work both in (b) luminescence configuration and in (c) reflection configuration. The possibility of switching between the two configurations, without changing the investigated area of the sample, is essential for controlling the successful infiltration at single pore level.

Image of FIG. 2.
FIG. 2.

(Color) (a) Luminescence signal: a single pore of in diameter has been infiltrated with the Rhodamine solution. (b) Reflection image of the same sample region. (c) Horizontal and (d) vertical profiles along the center of the images in (a) and (b). The perfect overlap between the maximum in the luminescence curves (red lines) and the minimum in the reflection curves (blue lines) confirms that the solution is present only in the single selected pore.

Image of FIG. 3.
FIG. 3.

(Color) Experimental realization of an “S-shaped” waveguide. (a) CLSM image collected in emission configuration in the sample region where successive microinfiltrations have created an “S4-waveguide.” (b) Calculated band diagram for the TE modes of the structure reported in the inset that simulates the experimental realized waveguide. The bulk sample is characterized by a band gap between and . The inserted waveguide determines the appearance of a miniband of guided modes around . The inset reports the quasiperiodic variation of the dielectric constant that summarize the parameters chosen for simulating the S-shaped waveguide: pore radius, , water dielectric constant, , bulk dielectric constant, . The light blue spots represent the infiltrated pores. (c) Calculated spatial distribution of the electric field intensity associated with one of the TE mode introduced by the S-shaped waveguide inside the photonic band gap. (d) Calculated spatial distribution of the magnetic field associated with the same TE mode considered in (c).


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Scitation: Rewritable photonic circuits