There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

Data Mining - Concepts and Techniques.

The term photonic crystals appears because of the analogy between electron waves in crystals and the light waves in artificial periodic dielectric structures. During the recent years the investigation of one-, two-and three-dimensional periodic structures has attracted a widespread attention of the world optics community because of great potentiality of such structures in advanced applied optical fields. The interest in periodic structures has been stimulated by the fast development of semiconductor technology that now allows the fabrication of artificial structures, whose period is comparable with the wavelength of light in the visible and infrared ranges.

http://ieeexplore.ieee.org/iel5/6354/16969/00781867.pdf

Photonic crystals

Finite element based full vectorial modal solution approach has been developed to determine effective index of space filling mode, cutoff of fundamental and second order guided modes, identifying single mode operation of photonic crystal fibers.

Characterization of the Single mode operation of PCF using Finite Element Method

Transmission, reflection, alignment tolerance, and far-field profiles of spot-size converters

In this paper several approaches to expand the field profile of a laser beam are studied. The power coupling efficiency and fiber coupling loss are discussed in detail. To achieve this, the rigorous vector finite element method is used to calculate the modal propagation properties and the least squares boundary residual method is employed to calculate the coupling loss, the reflection coefficient and the alignment tolerances of these devices.

Spot-size transformations for laser-fiber integration

The characterization and optimization of optical microring resonator-based optical filters on deeply etched GaInAsP-Inp waveguides, using the finite element-based beam propagation approach is presented here. Design issues for directional coupler- and multimode interference coupler-based devices, such as field evolution, optical power, phase, fabrication tolerance and wavelength dependence have been investigated.

Design issues for directional coupler- and MMI-based optical microring resonator filters on InP

Finite element analysis based on the vector H-field formulation and incorporating the perturbation technique is used to optimize a surface plasmon resonance based fiber optic sensor for the detection of E coli.

Muttukrishnan Rajarajan

Papers

Characterization of the Single mode operation of PCF using Finite Element Method

Transmission, reflection, alignment tolerance, and far-field profiles of spot-size converters

Spot-size transformations for laser-fiber integration

Design issues for directional coupler- and MMI-based optical microring resonator filters on InP

Design and optimization of surface plasmon resonance based biosensor for the detection of E.coli