Guided wave field

The guided-wave field of a planar waveguide is written as (1 )... 

Note that the mode number m indicates the number of zeros in the guided wave field, and the thicker the film, the larger the number of guided modes... 

Future development of affinity biosensors based on spectroscopy of guided waves will be driven by the needs of the consumer. These biosensor technologies hold potential to benefit important fields including pharmaceutical research, medical diagnostics, environmental monitoring, food safety, and security. Applications in these areas will challenge research and development in the field. 

R.E. Collin, Field theory of guided waves, 2 ed., (IEEE Press, New York, 1991). 

Note that it is primarily this normalization which makes the subsequent formulae appear different from the well-known plane wave cases. For a planar waveguide, it is useful to assume that the guided-wave beam is very wide (D X) and uniform along the y-axis, so that the field distribution is independent of y, and the integral over y just produces D, the beam width. 

The existence of the nonlinear polarization field does not ensure the generation of significant signal fields. With the exception of phenomena based on an intensity-dependent refractive index, the generation of the nonlinearly produced signal waves at frequency cos can be treated in the slowly varying amplitude approximation with well-known guided wave coupled mode theory (1). As already explicitly assumed in Equation 1, the amplitudes of the waves are allowed to vary slowly with... 

Figure 5. Optimization of the cross-section for guided wave second harmonic generation. Phase-matching occurs between two dissimilar modes and the overlap integral is optimized by causing the interference effects to occur in linear regions of the waveguide only. For the case of a single nonlinear film, interference effects occur as the field product is integrated over the thickness dimension.

We have presented a review of the salient features of nonlinear integrated optics. It appears that nonlinear organic materials can play an important role in second- and third-order guided-wave devices. This field requires a great deal of material characterization and processing, however, before significant advances are realized. 

The response of a topological distortion to experimental study would be of the dual wave-particle kind. It generates a local wave field in its immediate environment and this field constitutes the wave that appears to guide... 

FIG. 4.4 ATR setup for the excitation of surface plasmons in Kretsdimium geometry. (As top) A thin metal film (thickness 50 nm) is evaporated into the base of the prism and acts as a resonator driven by the photon field. (As bottom) The resonant excitation of the surface pbsnon wave is seen in the reflectivity irve as a sharp dip at coupling hgfe (B) Setup for the excitation of guided waves. Modes are excited at the (external) an e 0 . 

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