GaAs-based micro/nanomechanical resonators

GaAs Coupled Micro Resonators with Enhanced Sensitive Mass Detection

This work demonstrates the improvement of mass detection sensitivity and time response using a simple sensor structure. Indeed, complicated technological processes leading to very brittle sensing structures are often required to reach high sensitivity when we want to detect specific molecules in biological fields. These developments constitute an obstacle to the early diagnosis of diseases. An ...

Size-independent Young’s modulus of inverted conical GaAs nanowire resonators

We explore mechanical properties of top down fabricated, singly clamped inverted conical GaAs nanowires. Combining nanowire lengths of 2–9 lm with foot diameters of 36–935 nm yields fundamental flexural eigenmodes spanning two orders of magnitude from 200 kHz to 42 MHz. We extract a size-independent value of Young’s modulus of (456 3) GPa. With foot diameters down to a few tens of nanometers, t...

Capping of InAs/GaAs Quantum Dots for GaAs Based Lasers

Active ring resonators based on GaInAsP/InP

Compact integrated microring resonators are promising candidates for various applications in optical signal processing and communication such as optical filters, wavelength (de)multiplexers, single mode sources, dispersion compensators and wavelength converters. Active GaInAsP/InP material is particularly suited for the fabrication of "lossless" filter devices as well as novel laser components ...

Active sensing in silicon-based MEMS resonators

Microelectromechanical resonators are advantageous over traditional LC tanks and off-chip quartz crystals due to their high quality factors, small size and low power consumption. FET-sensing has been demonstrated in resonant body transistors (RBTs) to reach an order of magnitude higher frequencies than possible with passive resonators due to the greater sensing efficiency of FET sensing over tr...