Elimination of Thermomechanical Noise in Piezoelectric Optomechanical Crystals

Slot-mode-coupled optomechanical crystals.

We present a design methodology and analysis of a cavity optomechanical system in which a localized GHz frequency mechanical mode of a nanobeam resonator is evanescently coupled to a high quality factor (Q > 10(6)) optical mode of a separate nanobeam optical cavity. Using separate nanobeams provides flexibility, enabling the independent design and optimization of the optics and mechanics of the...

Enhanced Piezoelectric Properties of Piezoelectric Single Crystals by Domain Engineering

Various engineered domain configurations were induced into barium titanate (BaTiO3) single crystals, and their piezoelectric properties were investigated as a function of (1) the crystal structure, (2) the crystallographic orientation and (3) the domain size. As a result, the orthorhombic mm2 BaTiO3 crystals showed the highest piezoelectric properties among three kinds of BaTiO3 crystals such a...

Piezoelectric Polaron Effects in Regular Crystals

gelten soll, so ist auch M' (T) ^ M (T) ; die Magnetisierung ist also monoton „mit dem Spektrum". Die in Abschnitt III durchgeführten Näherungen für die Eigenwerte kommen nun gerade einer solchen Ersetzung des wahren Spektrums durch ein approximiertes gleich und für diese Ersetzung gilt (61). Denn sowohl / V als auch eist überall größer als seine Schmiegungsparabel, durch die wir die X -Abhängi...

Coherent quantum-noise cancellation for optomechanical sensors.

Using a flow chart representation of quantum optomechanical dynamics, we design coherent quantum-noise-cancellation schemes that can eliminate the backaction noise induced by radiation pressure at all frequencies and thus overcome the standard quantum limit of force sensing. The proposed schemes can be regarded as novel examples of coherent feedforward quantum control.

Si3N4 optomechanical crystals in the resolved-sideband regime