CLEO 2008 Practice Talks

Andreas Velten

Tunable semiconductor hybrid mode-locked laser using a tapered amplifier as gain medium

A semiconductor laser, using only a tapered amplifier as gain medium, is mode-locked with a multiple quantum well saturable absorber and RF modulation, generating 0.5 ps pulses without dispersion compensation.

Jing Chen

Leaky and bound modes of finite planar metal-insulator-metal plasmonic waveguides

Consideration of finite planar metal-insulator-metal plasmonic waveguides reveals bound and leaky modes with a spectral gap between them. Antenna mode formed in the leaky radiation region offers both free-space coupling mechanisms and beam steering devices.

Alexander Neumann

Structured Illumination for Imaging Interferometric Microscopy

Imaging interferometric microscopy is a synthetic aperture approach to achieving resolutions approaching λ/4n with a low-NA objective. Structured illumination, adapted to implementation in existing microscopes, extends its capabilities.

Svyatoslav Smolev

Graded Index Optical Lens Using Inhomogeneous Metamaterials

We numerically demonstrate a low loss optical lens (~1.55 µm) with inhomogeneous graded index metamaterials. Parametric optimization studies are presented. For a (64x64) micron squared sample f=3.2 mm with T=0.76. This structure can be easily fabricated with standard semiconductor processing techniques.

Jingyu Zhang

Saturation of Second Harmonic Generation in Plasmon-Coupled GaAs-Filled Hole Arrays.

Second harmonic generation (SH) based on the enhancement of localized fields confined in nanoscale periodic, GaAs-filled holes in a metal film is presented. The SH saturates for a fundamental peak power intensity > 20 GW/cm2.

Nathan Withers

Fast-Decay-Time Scintillation of LaF_3 :Ce Colloidal Nanocrystals

Positron emission tomography requires high-brightness fast-decay scintillators for coincidence counting of positron annihilation events. We demonstrate that LaF_3 :Ce nanocrystals show promising characteristics for that application. Scintillation response and photoluminescence lifetime below 27 ns are measured.

Wednesday, April 30th, at 12:00 noon

CHTM, Room 101

A light lunch will be served at the event.