Turning losses into gain in nonlinear optics

Absorption in Metamaterials: Turning Loss into Gain

MIT Student 12 May 2010 ME 2.57: Nano-to-Macro Transport Processes Prof. Chen Absorption in Metamaterials: Turning Loss into Gain INTRODUCTION Nature has often served as inspiration for engineers. The setae of gecko feet are mimicked for climbing robots, the vivid coats of butterflies and peacocks motivate research in structural colors, and the streamline shapes of certain species of fish are i...

Policy Options for Turning a Drain into a Gain

High demand for researchers and scientists has led to an increase in skilled migration in recent years. The paper focuses on improving our understanding of the push and pull factors affecting the migration decisions of researchers and scientists from developing countries and discusses policy options for maximizing the potential gains associated with international mobility of advanced human capi...

Nonlinear Optics Basics: Kramers-Krönig Relations in Nonlinear Optics

Hiding an elephant into a matchbox with transformation optics

Based on transformation optics‎, ‎we propose an illusion device that can make‎ ‎objects look much smaller and different than they actually are‎. ‎In particular‎, ‎the device has a capability to hide a large object (like an elephant) into a‎ ‎small one (like a matchbox)‎. ‎Compared to previous proposals for illusion‎ ‎devices‎, ‎there is no requirement for negative refractive index or for spee...

Synthesis of TiO2-ZnO-ZrO2 Nanocomposites for Nonlinear Optics Applications

A sol-gel technique under ultrasonic irradiation was applied to synthesize ZrO2/TiO2/ZnOnanocomposites. X-ray diffraction analysis confirmed the successful synthesis of nanocomposites. The strain and crystalline size values of ZrO2/TiO2/ZnO nanocomposites are estimated to be 9.98×10-4 and 17.66 nm, respectively. The linear absorption coefficient of ZrO2/TiO2/ZnO nanocomposites was measure...