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This Photonic sensing technology is a new and accurate measurement technology for bio-sensing applications. In this paper, a two-dimensional photonic crystal micro cavity ring resonator based sensor is proposed and designed to detect the glucose concentration in urine over the range of 0 gm/dl-15 gm/dl. The optical properties of glucose in urine are studied and average value of refractive index for...
This paper proposes the use of energy management of thermal storage to boost the efficiency of Gallium Antimonide (GaSb) solar cells. The radiation from the sun is stored as thermal energy which serves as alternative energy source alongside the generated electrical energy using optical filters. The optical filter maximizes the fraction of photon energy that is converted to electrical energy through...
A set of modeling defects in one-dimensional photonic crystal and their impact on reflectivity as a function of the wavelength of the incident wave is presented. Electric-field profiles for various situations are shown. The simulation based on the transfer-matrix method.
Photonic crystal is a dielectric with periodic modulation of refractive index of constituent elements which results in photonic band-gap effect which is unique property of Photonic crystal. Such Band gap effect helps to analyse the optical performance of Photonic crystals. This paper deals with Photonic Band gap (PBG) calculations for two dimensional Photonic crystals and the effect of size that is...
In this paper, the Green function approach is used to study the propagation of electromagnetic waves through a finite photonic crystal containing two similar flat cavities. The effects of the layers thicknesses cavities and their positions on the transmission spectra are studied. The results show the occurrence of selective electromagnetic modes (one or more) in the band gaps of the periodic photonic...
1. Concept to control photons in 2D photonic crystal /Photonic nano-devices /Highest Q factor > 9 million has been achieved 2. Development of Advanced Light Manipulation Technology /Stop Light (On-demand Catch/Release of Optical Pulses) /All-Si Raman Lasing 3. Realization of High-Power, High-Beam Quality Lasers /Watt-class CW Lasing Oscillation has been realized /Demonstration of Burning of Paper...
In this paper, we present an extension of the modified single oscillator model able to predict the temperature related variations of refractive index of InP/InGaAsP materials. Model is based on three parameters- oscillation energy, dispersion energy and bandgap energy. The proposed model enables to calculate the thermo-optic coefficient in the typical telecommunication wavelength range. The obtained...
Refractive index change using quantum well intermixing (QWI) was investigated for lateral light confinement of vertical cavity surface emitting lasers (VCSELs). Refractive index change of a GaInAs/GaAs quantum well by the QWI was numerically analyzed from calculated absorption spectrum. 1% of refractive index change is expected by control of the QWI condition. A QWI-VCSEL was fabricated for verification...
Complete photonic bandgap is formed in two-dimensional photonic crystal with triangular geometry under TE mode of propagation. Maxwell's equations are solved using plane wave expansion method and eigen equations for TE and TM modes are obtained using appropriate boundary conditions. Structure is realized by inserting cylindrical rods in triangular lattice. Results reveal that magnitude of bandgap...
In this work, CuInS2 (CIS) thin films were prepared by spray pyrolysis method, and optical properties were investigated. CuInS2 in the form of films is prepared at different deposition conditions by a simple and economical spray pyrolysis method. Optical constants such as band gap Eg, extinction coefficient k, refractive index n, and dielectric constants e1 and e2 were determined from the measured...
This paper analyses the eigenfrequencies of an infinitely long chain of microresonators with PT symmetry. The results show that the depth of modulation of the real part of the refractive index can be used to control the threshold point of the PT structure.
In this paper, two-dimension band pass filters are proposed to design CWDM de-multiplexer which permit to separate two telecom wavelengths (1.31 μm and 1.55 μm). The square lattice with TE mode are adapted to designed the proposed de-multiplexer with help Photonic Band Gap (PBG). The structure has been designed using silicon rods, refractive index 3.45, which are embedded in air. The Plane Wave Expansion...
The work is basically focused on the Design and simulation of Bio-chip based Optical Sensor for the DNA analysis. In medical science it has been observed that the physical agents or errors in DNA replication alter the usual DNA sequence causing cancer and other genetic diseases. It takes 5–7 years for a normal cell to become cancerous. 70% of the cancer conditions that are detected are at the advanced...
In this paper, the design & performance of two dimensional (2-D) photonic crystal (PhC) wavelength division demultiplexer is investigated using finite difference time domain (FDTD) method. The photonic band gap (PBG) is calculated by plane wave expansion (PWE) method. The reported design provides two de-multiplexed signals one at wavelength 1.31μm and another at wavelength 1.55μm which belong...
The Photonic-Crystal-to-Multilayer-Transformation (PCMT) developed in this paper provides a novel and rapid tool for analyzing and designing photonic crystals. The PCMT method transfers a complicated 3-D photonic crystal to a 1-D multilayer equivalent. Then, the optical properties can be easily calculated by Fresnel's equation. This method reduces the amount of computing resource and results in excellent...
In this paper, heterostructure based Channel Drop Filter (CDF) is designed. Wavelength Division Multiplexing systems using Two Dimensional (2D) Photonic Crystal Ring Resonator (PCRR) which is essential for Photonic Integrated Circuits (PICs) and future optical networks. The structure is devised in 2D square lattice which contains circular and elliptical Si rods in air host. The designed channel drop...
In this paper we investigated one of the most recently introduced phenomena in Photonic Crystal structures, responsible for collimating and guiding light through the preferred direction without diffraction, to design self-collimation based waveguide. The advantage of using self-collimation property to design waveguides is discussed and the idea is compared with conventional band gap engineered waveguides...
In this paper, a new work on channel drop filters (CDFs) based on photonic crystals ring resonators (PCRRs) is presented. The filter characteristics for single-ring configurations based on two dimensional (2D) square lattice photonic crystal (PC) silicon rods have been investigated by using the two-dimensional (2D) finite-difference time-domain (FDTD) method. The CDF we designed can easily separate...
Floquet multipliers are analysed for the Bloch waves representing light propagation in both absorptive and non-absorptive one-dimensional photonic crystals. In particular, the dependence of the multipliers in the complex plane on frequency (wavenumber) of the propagating light is studied. As a result, the ambiguity in assigning a proper multiplier to the direct/backward Bloch wave in the allowed bands...
For several compositions of In1−xGaxAsyP1−y lattice-matched to InP spectroscopic measurements were made. With the help of the Tanguy model, the refractive indices are calculated in the infrared transparent and absorption region. From these measurements general parameters for the Tanguy model are derived for the In1−xGaxAsyP1−y material system lattice-matched to InP.
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