Photonic Materials & Devices – Page 32

Nano-Scale Effects in GaN-based Light-Emitting Diodes

Piprek J., Nakamura S., University of California, US

We here investigate the effects of built-in polarization on the properties of non-symmetric InGaN quantum wells. The impact of these nano-scale effects on the performance of blue light emitting diodes is analyzed utilizing advanced numerical [...]

An Ultra-Fast Scheme for Sample-Detection in Dynamic-Mode Atomic Force Microscopy

Sahoo D.R., Sebastian A., Salapaka M.V., Iowa State University, US

In typical dynamic mode operation of atomic force microscopes steady state signals like amplitude and phase are used for detection and imaging of material. In these methods, high quality factor of the cantilever results in [...]

High Resolution Backside Imaging and Thermography using a Numerical Aperature Increasing Lens

Ünlü M.S., Ippolito S.B., Eraslan M.G., Thorne S.A., Vamivakas A., Goldberg B.B., Leblebici Y., Boston University, US

Nanoscale imaging of defects in ICs is a great current technological challenge as IC feature sizes continue to shrink. We have developed novel techniques based on a Numerical Aperture Increasing Lens (NAIL) to study semiconductors [...]

Local Optical Field in the Neighborhood of Structured Surfaces: Phase Singularities and Talbot Effect

Levine B., Caumont M., Amien C., Chaudret B., Dwir B., Bacsa W.S., LPST Université Paul Sabatier, FR

We have probed the local optical field in the vicinity of structured surfaces to observe optical coherence effects. We have used a sub -wavelength sized optical fiber probe to map the local field of microgratings [...]

Ultimate Limits to Optical Displacement Detection in Nanoelectromechanical Systems

Kouh T., Karabacak D., Kim D-H., Ekinci K.L., Boston University, US

Nano-electro-mechanical Systems (NEMS) are among the most promising manifestations of the emerging field of nanotechnology. These are electromechanical systems with dimensions in the deep submicron mostly operated in their resonant modes. In this size regime, [...]

Nano Photonics, Optoelectronics and Imaging

CAD for Opto-Electronic Microsystems

Kurzweg T.P., Levitan S.P., Marchand P.J., Prough K.R., Chiarulli D.M., University of Pittsburgh, US

The use of MEMs technology has enabled the fabrica-tion of micro-optical and micro-electro-mechanical systems on a common substrate. This has led to new challenges in computer aided design of optical micro-electro-mechanical systems. We have extended [...]

Physically Rigorous Modeling of Sensing Techniques Exploiting the Thermo-Optical and Electro-Optical Effect

Thalhammer R., Hille F., Scheubert P., Wachutka G., Münich University of Technology, DE

The complex refractive index in semiconductors depends on several electrical, thermal, and mechanical state variables, e. g. carrier concentrations, lattice temperature, or mechanical stress. Making use of these dependencies, various internal laser probing techniques and [...]

System-Level Optical Models of 3-D Laser Projection Systems Using Micromirror Arrays

Albrecht J., Seidel R., Melzer L., Müller D., Chemnitz University of Technology, DE

In this paper the development of system-level optical models that can be used e.g. for simulating entire laser projection systems is presented. After a short motivation ray optics as the simplest theory of optics is [...]

Rectilinear Dynamics of Magnetically Driven Microsystems

Kilani M.I., Chen C-J., Haik Y., Pai V., FAMU-FSU College of Engineering, US

The dynamic behavior of magnetically driven microsystems is investigated in this study. An experimental setup designed to simulate the dynamic response of a micro-roller element moving in rectilinear path under influence of an external magnetic [...]