scholarly journals Beam splitting at the output of photonic crystal waveguides with discrete surface point defects

2010 ◽  
Vol 18 (23) ◽  
pp. 24245 ◽  
Author(s):  
Qi Wang ◽  
Lanlan Zhang ◽  
Qi Li
Keyword(s):  
Photonic Crystal ◽  
Point Defects ◽  
Surface Point ◽  
Photonic Crystal Waveguides ◽  
Beam Splitting ◽  
Discrete Surface

Design of a new two-dimensional optical biosensor using photonic crystal waveguides and a nanocavity

2016 ◽  
Vol 5 (1) ◽  
Author(s):  
Hamideh Mohsenirad ◽  
Saeed Olyaee ◽  
Mahmood Seifouri
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Point Defects ◽  
Finite Difference Time Domain ◽  
Optical Biosensor ◽  
Two Dimensional ◽  
Plane Wave Expansion ◽  
Photonic Crystal Waveguides ◽  
Two Dimensional Photonic Crystal ◽  
Difference Time

AbstractIn this paper, a two-dimensional photonic crystal biosensor for medical applications based on two waveguides and a nanocavity is presented. The waveguides and nanocavity are created by introducing line and point defects into a photonic crystal, respectively. It could be shown that by injecting an analyte into a sensing hole, and thus changing its refractive index, may shift the resonant wavelength. The proposed structure is designed for the wavelength range of 1.5259–1.6934 μm. Sensitivity, the most important biosensor parameter, was studied and found to be approximately equal to 83.75 nm/refractive index units (RIU). An important specification of this structure is its very small dimensions. Two-dimensional finite-difference time domain and plane-wave expansion methods were used for both to simulate the proposed structure and to obtain the band diagrams.

Slow-light Enhanced Nonlinear Optics in Silicon Photonic Crystal Waveguides

PIERS Online ◽  
2010 ◽  
Vol 6 (3) ◽  
pp. 273-278 ◽  
Author(s):  
David J. Moss ◽  
B. Corcoran ◽  
C. Monat ◽  
Christian Grillet ◽  
T. P. White ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Nonlinear Optics ◽  
Slow Light ◽  
Photonic Crystal Waveguides ◽  
Silicon Photonic

scholarly journals Band-Gap Solitons in Nonlinear Photonic Crystal Waveguides and Their Application for Functional All-Optical Logic Gating

Photonics ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 250
Author(s):  
Vakhtang Jandieri ◽  
Ramaz Khomeriki ◽  
Tornike Onoprishvili ◽  
Daniel Erni ◽  
Levan Chotorlishvili ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Band Gap ◽  
Crystalline Silicon ◽  
Logic Gates ◽  
Photonic Crystal Waveguides ◽  
Optical Logic ◽  
Logical Operation ◽  
Pulse Envelope ◽  
Gap Soliton ◽  
All Optical

This review paper summarizes our previous findings regarding propagation characteristics of band-gap temporal solitons in photonic crystal waveguides with Kerr-type nonlinearity and a realization of functional and easily scalable all-optical NOT, AND and NAND logic gates. The proposed structure consists of a planar air-hole type photonic crystal in crystalline silicon as the nonlinear background material. A main advantage of proposing the gap-soliton as a signal carrier is that, by operating in the true time-domain, the temporal soliton maintains a stable pulse envelope during each logical operation. Hence, multiple concatenated all-optical logic gates can be easily realized paving the way to multiple-input ultrafast full-optical digital signal processing. In the suggested setup, due to the gap-soliton features, there is no need to amplify the output signal after each operation which can be directly used as a new input signal for another logical operation. The efficiency of the proposed logic gates as well as their scalability is validated using our original rigorous theoretical formalism confirmed by full-wave computational electromagnetics.

scholarly journals Effect of hole-shape irregularities on photonic crystal waveguides

2012 ◽  
Vol 37 (15) ◽  
pp. 3108 ◽  
Author(s):  
Momchil Minkov ◽  
Vincenzo Savona
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Waveguides ◽  
Hole Shape
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