We present a theoretical roadmap for three-dimensional optical waveguide networks in holographically defined, diamondlike photonic band gap PBG materials. A fully 3D waveguide network is demonstrated through broadband 100–200 nm , single-mode waveguiding in air, coupled with sharp bends in three dimensions with minimal backscattering. Optimal waveguides in the in-plane x and y directions are sh...

For a good THz waveguide, both low propagating loss and small mode width are usually very important. However, the high ohmic loss of metals and the high absorption loss of dielectric materials result in that it still remains a challenge to obtain the two capabilities at the same time. In this paper, planar dielectric-gap-metal (DGM) waveguides are presented to guide THz wave. According to the d...

We experimentally demonstrate a terahertz-bandwidth photonic differentiator employing a silicon-on-insulator directional coupler. The integrated waveguide coupler with two identical paralleled strip waveguides achieves a first-order differentiator when full energy coupling is met from one waveguide to another. The integrated waveguide coupler can offer different operation bandwidths by changing...

An active, photonic band gap-based microcavity emitter in the near infrared is demonstrated. We present direct measurement of the spontaneous emission power and spectrum from a microcavity formed using a two-dimensional photonic band gap structure in a half wavelength thick slab waveguide. The appearance of cavity resonance peaks in the spectrum correspond to the photonic band gap energy. For d...

On the basis of a mathematical model, problem compression two elastic transversely isotropic half-spaces, one which contains shallow near-surface groove an elliptical section, is considered. The solution to obtained using Elliott representation for body in terms harmonic functions, classical potentials and reducing boundary value considering integro-differential equation with unknown domain int...