Essays about: "Photonic Crystals"

Showing result 1 - 5 of 8 essays containing the words Photonic Crystals.

1. 1. Transient Plasma Photonic Crystals - A Route Towards Slow Ultra-intense Light?

   University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

   Author : Robin Weissenbilder; [2018]
   Keywords : slow; light; plasma; photonic; crystal; transient; ultra-intense; short; pulse; laser; Physics and Astronomy;

   Abstract : Periodic electron and ion density modulations in near critical density plasmas induced by counterpropagating femtosecond pulses of intensities on the order of 10¹⁵ to 10¹⁶ Wcm⁻² are described in a linear and stationary regime and investigated using particle-in-cell simulations in one and two dimensions. The periodic gratings produce transient plasma photonic crystals lasting up to several picoseconds with ultra-wide angle-selective band gaps on the order of Δω/ω₀ ≈ 10-20%. READ MORE

3. 2. Construction and Characterization of a Confocal Setup for Functionalization of Light Emitting Diodes and Laser Diodes Using an Amorphous Nonlinear Medium

   University essay from Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

   Author : Hana Zeneli; [2018]
   Keywords : Characterization; Characterization Microscope; Microscope; Confocal; Amorphous Nonlinear Medium; Laser; Laser Diodes; Infrared Laser; Infrared; Optics; Nonlinear Optics; Nonlinear; White Light Emission; Infrared to White Light; Physics and Astronomy;

   Abstract : A confocal microscope is built to examine molecular powders, and in particular the (PhSn)_4S_6 cluster, that emits white light when irradiated with infrared laser light. The confocal microscope operating at long working distances is assembled and characterized. READ MORE

4. 3. Self-Assembly and Electrical Conductivity of Colloids

   University essay from Uppsala universitet/Materialfysik

   Author : Pier Silvio Tibaldi; [2015]
   Keywords : colloids; self-assembly; electrical conductivity;

   Abstract : Self-assembly is an astonishing phenomenon at the base of organized structures’ formation from disordered systems. It occurs in nature from atomic and molecular lengths to galactic distances. Nowadays self-assembly of colloidal solutions can be used to fabricate photonic crystals and metamaterials. READ MORE

5. 4. Pseudospectra and Linearization Techniques of Rational Eigenvalue Problems

   University essay from Institutionen för matematik och matematisk statistik

   Author : Axel Torshage; [2013]
   Keywords : Pseudospectra; Linearization; Rational Eigenvalue Problems;

   Abstract : This thesis concerns the analysis and sensitivity of nonlinear eigenvalue problems for matrices and linear operators. The first part illustrates that lack of normality may result in catastrophic ill-conditioned eigenvalue problem. READ MORE

6. 5. Simulation of Phased Arrays with Rectangular Microstrip Patches on Photonic Crystal Substrates

   University essay from Institutionen för datavetenskap, fysik och matematik, DFM

   Author : Asim Akhtar; Hassan Mateen Alahi; Moeed Sehnan; [2012]
   Keywords : Phased arrays antenna on photonic crystal;

   Abstract : This thesis describes the investigation of photonic crystals as a substrate in microstrip phased array antennas. Alumina with a relative dielectric constant of 9.6 is used as substrate to obtain miniaturization of the components in the high-frequency range. READ MORE