Microstructure fibers for gas detection

Photonic bandgap modification in hollow optical fibers integrated with single walled carbon nanotubes

“…A promising building block to realize these multifunctional optoelectronic devices are the hollow-core optical fibers (HOFs) which, being composed by a periodic distribution of micrometric air-holes running uniformly along the fiber length [2], offer a high degree of freedom in their fabrication and at the same time several opportunities of integration with specific materials. Also by manipulating the properties of the in-fiber integrated materials, the guiding features of the HOF itself can be properly changed in order to develop new tunable photonic devices [3][4][5] as well as optical fiber sensors [6,7].…”

“…The photonic quasi-lattices are artificial dielectric inhomogeneous media, where scattering centers are usually located in the vertices of the tiles [5]. The quasiperiodic order gives rise to many nonequivalent defect sites, increasing the flexibility of these materials for different photonic applications and leading to interesting properties for confining and guiding electromagnetic energy [6,7]. Superlensing effect, directive emission, and mode confinement [8 -11] are examples of the quasicrystal features that have recently attracted tremendous interest because of their potential impact in optical components.…”

Fiber-Optic Chemical Sensors and Biosensors

“…This novel gas sensor has the capability of gas detection with a cell volume in the sub-nanoliter range. A study of the capabilities of microstructure fibers for evanescent wave vapor sensing is presented in ref 181. Toluene vapor in nitrogen gas was investigated.…”

Microstructured Optical Fibers Filled with Carbon Nanotubes: Photonic Bandgap Modification and Sensing Applications

“…A promising building block to realize these multifunctional optoelectronic devices are the Microstructured Optical Fibers (MOFs) which, being composed by a periodic distribution of micrometric air-holes running uniformly along the fiber length (Knight et al, 2003), offer an high degree of freedom in their fabrication and at the same time several opportunities of integration with specific materials. Also by manipulating the properties of the in-fiber integrated materials, the guiding features of the MOF itself can be properly changed in order to develop new tunable photonic devices (Domachuk et al 2004;Larsen et al 2003;Huang et al 2004) as well as optical fiber sensors (Benabid et al 2005;Matejec et al 2006). Single Walled Carbon Nanotubes (SWCNTs) constitute a very promising material for multimaterial and multifunctional photonic devices in light of their unique electrical and mechanical properties (Dresselhaus et al 2001).…”