| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Tobar, Michael
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2024Conductivity freeze-out in isotopically pure Si -28 at millikelvin temperaturescitations
- 2019Experimental implementations of cavity-magnon systemscitations
- 2019Low-Temperature Properties of Whispering-Gallery Modes in Isotopically Pure Silicon-28citations
- 2018Isotopically Pure Silcon-28 Whispering Gallery Mode Resonators
- 2018Cavity magnon polaritons with lithium ferrite and three-dimensional microwave resonators at millikelvin temperaturescitations
- 2016A 3D printed superconducting aluminium microwave cavitycitations
- 2016Ultrahigh cooperativity interactions between magnons and resonant photons in a YIG spherecitations
- 2015Discovery of iron group impurity ion spin states in single crystal Y2SiO5 with strong coupling to whispering gallery photonscitations
- 2007Dependence of the dielectric permittivity of single-crystal quartz on thermal deformation at cryogenic temperaturescitations
- 2004The dual-mode frequency-locked technique for the characterisation of the temperature coefficient of permittivity of ainsotropic materialscitations
- 2004Whispering-Gallery Mode Technique Applied to the Measurement of the Dielectric Properties of Langasite Between 4 K and 300 K
- 2004Measurement of the strain-induced coefficient of permittivity of sapphire using whispering gallery modes excited in a high-Q acoustic sapphire oscillatorcitations
- 2001Whispering Gallery Method of Measuring Complex Permittivity in Highly Anisotropic Materials: Discovery of a New Type of Mode in Anisotropic Dielectric Resonatorscitations
- 2000Microwave characterisation of BaCe2Ti5O15 and Ba5Nb4O15 ceramic dielectric resonators using whispering gallery mode methodcitations
Places of action
| Organizations | Location | People |
|---|
article
Measurement of the strain-induced coefficient of permittivity of sapphire using whispering gallery modes excited in a high-Q acoustic sapphire oscillator
Abstract
A low-loss monolithic sapphire has been developed for use as a novel transducer via the interaction between the electrical and mechanical resonances, with the intent of measuring the standard quantum limit in a macroscopic mass. This work has investigated the transductance mechanism due to the interaction between electrical and mechanical resonances in a low-loss electrical and acoustic resonator, which operates in the regime where parametric interactions dominate. High electrical and mechanical quality factors (Q-factors) are obtained at low temperatures (4.2 K) using high purity sapphire and single loop suspension vibration isolation. In deriving the displacement sensitivity of the monolithic sapphire transducer (MST), the acoustic mode shape and electromagnetic field distribution must be taken into account rather than the use of a simple mass–spring model. With the aid of this model we determine for the first time the strain-induced coefficient of permittivity for sapphire, both perpendicular and parallel to the c-axis. By comparison with other work, it has been determined that changes in the dielectric constant due to strain are approximately eight times smaller than changes caused by thermal expansion.