Photonic bandgap engineering with inverse opal multistacks of different refractive index contrasts

2009 ◽  
Vol 95 (9) ◽  
pp. 091101 ◽  
Author(s):  
Dae-Kue Hwang ◽  
Heeso Noh ◽  
Hui Cao ◽  
Robert P. H. Chang
Keyword(s):  
Refractive Index ◽  
Photonic Bandgap ◽  
Inverse Opal ◽  
Bandgap Engineering

Angular Dispersion of Photonic Pseudogap in Opal vs Inverse Opal

2007 ◽  
Vol 1014 ◽  
Author(s):  
Lay Kuan Teh ◽  
Chee Cheong Wong
Keyword(s):  
Refractive Index ◽  
Group Velocity ◽  
Photonic Bandgap ◽  
Inverse Opal ◽  
Angular Range ◽  
Angular Dispersion ◽  
Blue Region ◽  
Low Dielectric ◽  
Index Contrast ◽  
High Dielectric

AbstractWe have recently achieved a non-dispersive, low-order pseudogap in the blue region near the L-point in electrodeposited ZnO inverse opal. This behavior is a consequence of the change in the interconnecting network of interstices from a low dielectric (air) in the opal to a high dielectric one in the inverse opal. To verify this, we present the calculated photonic bands along the LW direction, which corresponds to the angular range explored experimentally by means of angle-resolved spectroscopy. We also studied the dispersion as a function of refractive index contrast (RIC). Further increase of the RIC above the threshold necessary to open up a complete photonic bandgap between the 8th and 9th bands does not have significant effects on improving the non-dispersive characteristic in the pseudogap. The results could be extended to make other inverse photonic structures of different symmetry with non-dispersive bands suitable for the study of optical processes involving low group velocity.

Preparation and photonic bandgap properties of Na1/2Bi1/2TiO3 inverse opal photonic crystals

2009 ◽  
Vol 471 (1-2) ◽  
pp. 241-243 ◽  
Author(s):  
Zhengwen Yang ◽  
Ji Zhou ◽  
Xueguang Huang ◽  
Qin Xie ◽  
Ming Fu ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Photonic Bandgap ◽  
Inverse Opal

scholarly journals Microstructured and Photonic Bandgap Fibers for Applications in the Resonant Bio- and Chemical Sensors

2009 ◽  
Vol 2009 ◽  
pp. 1-20 ◽  
Author(s):  
Maksim Skorobogatiy
Keyword(s):  
Refractive Index ◽  
Photonic Bandgap ◽  
Functional Materials ◽  
Absorption Lines ◽  
Fiber Types ◽  
The Real ◽  
Resonant Sensors ◽  
Guided Mode ◽  
Photonic Bandgap Fibers ◽  
Resonant Effect

We review application of microstructured and photonic bandgap fibers for designing resonant optical sensors of changes in the value of analyte refractive index. This research subject has recently invoked much attention due to development of novel fiber types, as well as due to development of techniques for the activation of fiber microstructure with functional materials. Particularly, we consider two sensors types. The first sensor type employs hollow core photonic bandgap fibers where core guided mode is confined in the analyte filled core through resonant effect in the surrounding periodic reflector. The second sensor type employs metalized microstructured or photonic bandgap waveguides and fibers, where core guided mode is phase matched with a plasmon propagating at the fiber/analyte interface. In resonant sensors one typically employs fibers with strongly nonuniform spectral transmission characteristics that are sensitive to changes in the real part of the analyte refractive index. Moreover, if narrow absorption lines are present in the analyte transmission spectrum, due to Kramers-Kronig relation this will also result in strong variation in the real part of the refractive index in the vicinity of an absorption line. Therefore, resonant sensors allow detection of minute changes both in the real part of the analyte refractive index (10−6–10−4 RIU), as well as in the imaginary part of the analyte refractive index in the vicinity of absorption lines. In the following we detail various resonant sensor implementations, modes of operation, as well as analysis of sensitivities for some of the common transduction mechanisms for bio- and chemical sensing applications. Sensor designs considered in this review span spectral operation regions from the visible to terahertz.

Photonic Bandgap Engineering in Germanium Inverse Opals by Chemical Vapor Deposition

2001 ◽  
Vol 13 (21) ◽  
pp. 1634-1637 ◽  
Author(s):  
H. Míguez ◽  
E. Chomski ◽  
F. García-Santamaría ◽  
M. Ibisate ◽  
S. John ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Photonic Bandgap ◽  
Chemical Vapor ◽  
Bandgap Engineering ◽  
Inverse Opals

Ternary Inverse Opal System for Convenient and Reversible Photonic Bandgap Tuning

Langmuir ◽  
2008 ◽  
Vol 24 (18) ◽  
pp. 10519-10523 ◽  
Author(s):  
Zhan-Fang Liu ◽  
Tao Ding ◽  
Guo Zhang ◽  
Kai Song ◽  
Koen Clays ◽  
...  
Keyword(s):  
Photonic Bandgap ◽  
Inverse Opal ◽  
Bandgap Tuning
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