Silicon photonics

At the smallest scale, the silicon photonic wire waveguides that are the subject of this chapter have a silicon core only a few hundred nanometers across and refractive index of n = 3.47 at a wavelength of /. 1550 nm31. Figure 9.3 shows an example... 

Fig. 9.3 Oblique cross section view of the structure of a silicon photonic wire waveguide with a 220 nm x 450 nm core...

Silicon Photonic Wire Evanescent Field Sensors... 

Figure 9.8 shows a variant of the silicon photonic wire waveguide known as a slot waveguide, which has attracted considerable recent interest43 5. The structure consists of two parallel Si channel waveguides separated by a narrow gap. Here almost the entire mode field is concentrated in the gap between the two... 

Here Ng = /Ven A(dNCff/dA) is the group effective index of the ring waveguide, a parameter that takes into account the wavelength dependence of the effective index. In the absence of dispersion Ng = Neff, but in these silicon photonic wire waveguides, Ng = 4.8 is more than twice as large as /Ven = 2.2. 

Reed, G. T. Knights, A. P., Silicon Photonics An Introduction, Wiley, Chichester 2004... 

Pavesi, L. Lockwood, D. J., Silicon Photonics, Springer, Berlin, 2004... 

Densmore, A. Xu, D. X. Janz, S. Waldron, P. Mischki, T. Lopinski, G. Delage, A. Lapointe, J. Cheben, P. Lamontagne, B. Schmid, J. H, Spiral path high sensitivity silicon photonic wire molecular sensor with temperature independent response, Opt. Lett. 2008, 6, 596 598... 

Lee, M. R. Fauchet, P. M., Two dimensional silicon photonic crystal based biosensing platform for protein detection, Opt. Express 2007, 15, 4530 4535... 

Blanco, A., et al. (2000), Large-scale synthesis of a silicon photonic crystal with a complete three-dimensional bandgap near 1.5 micrometres, Nature, 405,437—440. 

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