Degeneracy effect of double negative medium on the transmission spectrum band of photonic crystal

<p>Periodic structures of double positive and double negative metamaterial of thickness of λ/4 is designed to stop long-wave infrared and mid-wave infrared frequencies for masking from infrared detection devices. Band-gaps are obtained by calculating reflection and transmission coefficients at probe point close to the front and back faces of the periodic structure. 1D- finite difference time domain method is implemented in Matlab to study the electromagnetic wave propagation which is incident normal to a periodic stack of double positive and double negative metamaterial of having refractive indices of 9 and -6 respectively, at centre wavelength. Drude model is adapted to model double negative medium. Band-gap obtained are compared with the conventional photonic crystal by replacing the double negative medium with a double positive medium with the magnitude of refractive index same as that of double negative medium. Band-gap obtained confirms the presence of Zero-n͂ band-gap in DPS-DNG photonic crystal which is wider than the reflection band in conventional photonic crystal; nearly twice in mid-wave infrared region and five times in long-wave infrared region. A novel and highly efficient convolutional perfectly matched layer absorbing boundary condition is used to terminate the infinite computational finite difference time domain lattices.</p>

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YMgB5O10 crystal preparation and attractive multi-wavelength emission characteristics of doping Nd3+ ions

Journal of Materials Chemistry C ◽

10.1039/d0tc05372d ◽

2021 ◽

Author(s):

Shijia Sun ◽

Qi Wei ◽

Bing-Xuan Li ◽

Xingjun Shi ◽

feifei yuan ◽

...

Keyword(s):

Crystal Structure ◽

Transmission Spectrum ◽

Systematic Investigation ◽

Solution Growth ◽

Emission Characteristics ◽

Multi Wavelength ◽

Growth Method ◽

Wavelength Emission ◽

Spectrum Band ◽

SPONTANEOUS EMISSION OF NANO-ENGINEERED FLUOROPHORES IN PHOTONIC CRYSTALS

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s0218863506003128 ◽

2006 ◽

Vol 15 (01) ◽

pp. 1-8 ◽

Cited By ~ 5

Author(s):

KAI SONG ◽

RENAUD VALLEE ◽

MARK VAN DER AUWERAER ◽

KOEN CLAYS

Keyword(s):

Photonic Crystal ◽

Photonic Crystals ◽

Point Source ◽

Emission Spectrum ◽

Spontaneous Emission ◽

Transmission Spectrum ◽

Photonic Bandgap ◽

Middle Layer ◽

Photonic Structure

The spontaneous emission of fluorophores embedded in a photonic crystal has been studied. By nano-engineering a sandwich-like photonic structure, such that fluorophore-coated photonic atoms constitute a middle layer between the photonic crystals, we have been able to precisely control the location of fluorophores in photonic crystals and exclude the presence of fluorophores at the surface of the crystal. It has been found that the stopband in the transmission spectrum is deeper than the stopband in the emission spectrum. We conjecture that the omnidirectional propagation of the emission from a point source in an incomplete photonic bandgap is the cause of the shallower stopband in emission.

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Effect of Barrier Layer Periodicity Asymmetry on Photonic Crystal Quantum Well Transmission Spectrum

Laser & Optoelectronics Progress ◽

10.3788/lop51.012701 ◽

2014 ◽

Vol 51 (1) ◽

pp. 012701

Author(s):

潘继环 Pan Jihuan ◽

苏安 Su An ◽

蒙成举 Meng Chengju ◽

高英俊 Gao Yingjun

Keyword(s):

Photonic Crystal ◽

Quantum Well ◽

Barrier Layer ◽

Transmission Spectrum

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TRANSIENT ELECTROMAGNETIC FIELDS IN A CAVITY WITH DISPERSIVE DOUBLE NEGATIVE MEDIUM

Progress In Electromagnetics Research M ◽

10.2528/pierm09062307 ◽

2009 ◽

Vol 8 ◽

pp. 51-65 ◽

Cited By ~ 8

Author(s):

Mariya S. Antyufeyeva ◽

Alexander Yu. Butrym ◽

Oleg A. Tretyakov

Keyword(s):

Electromagnetic Fields ◽

Double Negative ◽

Transient Electromagnetic ◽

Negative Medium

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Design and optimization of two dimensional photonic crystal based optical filter

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s0218863515500277 ◽

2015 ◽

Vol 24 (03) ◽

pp. 1550027 ◽

Cited By ~ 10

Author(s):

G. Rajalakshmi ◽

A. Sivanantha Raja ◽

D. Shanmuga Sundar

Keyword(s):

Refractive Index ◽

Photonic Crystal ◽

Transmission Spectrum ◽

Filter Design ◽

Photonic Band Gap ◽

Fdtd Method ◽

Optical Filter ◽

Two Dimensional ◽

Dimensional Photonic Crystal ◽

Two Dimensional Photonic Crystal

In this paper, the channel drop filter based on two dimensional photonic crystal is proposed. The structure is made of silicon rods with the refractive index n1 = 3.4641 which are perforated in air with refractive index n2 = 1. The simulation results are obtained using 2D finite difference time domain (FDTD) method. The photonic band gap is calculated by plane wave expansion solver method. Resonant mode of the ring resonator and the filter transmission spectrum is calculated using 2D FDTD method. Full width half maximum (FWHM) bandwidth of the filter at the output transmission spectrum from 1.508 μm to 1.512 μm is 4 nm. The quality factor of the filter is 377.5 and the proposed filter design is around 21 × 15 μm which is suitable for photonic integrated circuits.

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