scholarly journals Exciton–polaritons in GaAs-based slab waveguide photonic crystals

2021 ◽  
Vol 119 (18) ◽  
pp. 181101
Author(s):  
C. E. Whittaker ◽  
T. Isoniemi ◽  
S. Lovett ◽  
P. M. Walker ◽  
S. Kolodny ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Slab Waveguide ◽  
Exciton Polaritons

Exciton Polaritons in One-Dimensional Metal-Semiconductor Photonic Crystals

2008 ◽  
Vol 8 (12) ◽  
pp. 6584-6588 ◽  
Author(s):  
R. Márquez-Islas ◽  
B. Flores-Desirena ◽  
F. Pérez-Rodríguez
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Band Structure ◽  
Dielectric Function ◽  
Low Frequency ◽  
Photonic Band Structure ◽  
One Dimensional ◽  
Exciton Polaritons ◽  
Metal Layers ◽  
Photonic Band

We investigate theoretically the coupling of exciton with light in a one-dimensional photonic crystal. The unit cell of the crystal consists of two alternating layers, namely a metallic layer and a semiconductor one. The frequency-dependent dielectric function of the metal is described by the Drude model, whereas for the semiconductor we use a nonlocal excitonic dielectric function. The polariton dispersion for s-polarized modes in the metal-semiconductor photonic crystal is compared with that for a dielectric-semiconductor photonic crystal. Because of the metal layers, a low-frequency gap appears in the photonic band structure. The presence of the semiconductor gives rise to photonic bands associated with the coupling of light with size-quantized excitón states. At frequencies above the longitudinal exciton frequency, the photonic band structure exhibits anticrossing phenomena produced by the upper exciton–polariton mode and size-quantized excitons. It is found that the anticrossing phenomena in the metal-semiconductor photonic crystal occur at higher frequencies in comparison with the dielectric-semiconductor case.

scholarly journals Exciton polaritons in two-dimensional photonic crystals

2009 ◽  
Vol 80 (20) ◽  
Author(s):  
D. Bajoni ◽  
D. Gerace ◽  
M. Galli ◽  
J. Bloch ◽  
R. Braive ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Two Dimensional ◽  
Exciton Polaritons

Design of Photonic Crystals Waveguide Using Microfluidic Infiltration

2014 ◽  
Vol 492 ◽  
pp. 301-305 ◽  
Author(s):  
Faida Bougriou ◽  
Touraya Boumaza ◽  
Mohamed Bouchemat
Keyword(s):  
Photonic Crystals ◽  
Fdtd Method ◽  
High Sensitivity ◽  
Slab Waveguide ◽  
Label Free ◽  
Single Chip ◽  
Photonic Crystal Slab ◽  
Sensing Applications ◽  
Highly Sensitive ◽  
Label Free Detection

The use of photonic crystals (PCS) in biosensor applications has lead to the development of highly sensitive and selective microfluidic sensor elements. Two main advantages of these devices for sensing applications are their high sensitivity and their reduced size, which makes it possible, in one hand, to detect very small analytes without the need of markers (label-free detection), and to integrate many of these devices on a single chip to perform a multi-parameter detection on the other hand. In the present paper, we analyze the design of a highly sensitive microfluidic sensors based on 2D photonic crystal slab waveguide formed by increasing the radii of air holes localized at each side of the line defect and filling with homogenous de-ionized water (nc =1.33). The transmission spectrum of the sensor has been obtained with the use of Finite Difference Time Domain (FDTD) method and it has been observed that a 306 nm wavelength position of the lower band edge shift was observed corresponding to a sensitivity of more than 927 nm per refractive index unit (RIU). Development of microfluidic sensor designs that enhance sensitivity is especially important because it allows detection of lower concentrations of analytes.

Optical study of 2D photonic crystals in an InP/GaInAsP slab waveguide structure

2001 ◽  
Vol 694 ◽  
Author(s):  
Rolando Ferrini ◽  
David Leuenberger ◽  
Mikaël Mulot ◽  
Min Qiu ◽  
Jürgen Moosburger ◽  
...  
Keyword(s):  
Optical Properties ◽  
Photonic Crystals ◽  
Fdtd Method ◽  
Slab Waveguide ◽  
Optical Study ◽  
One Dimensional ◽  
Fabry Perot ◽  
Out Of Plane ◽  
Waveguide Transmission ◽  
Difference Time

AbstractWe report on the optical properties of two dimensional (2D) photonic crystals (PCs) deeply etched in an InP/GaInAsP step-index waveguide. Transmission (T) measurements through simple PC slabs and through one-dimensional (1D) Fabry-Pérot (FP) cavities between PC mirrors are reported and compared to theory. A 2D finite difference time-domain (FDTD) method combined to a phenomenological out-of-plane loss model is used to assess different loss contributions. The PC optical properties are deduced from the FP peak analysis. The origin of the high T level observed inside the stopgap is investigated.

Sign in / Sign up

Export Citation Format

Share Document