Axion detection with negatively coupled cavity arrays

Research output: Contribution to journalArticle

17 Citations (Scopus)


Using eigenmode analysis and full 3D FEM modelling, we demonstrate that a closed cavity built of an array of elementary harmonic oscillators with negative mutual couplings exhibits a dispersion curve with lower order modes corresponding to higher frequencies. Such cavity arrays may help to achieve large mode volumes for boosting sensitivity of the axion searches, where the mode volume for the composed array scales proportional to the number of elements, but the frequency remains constant. The negatively coupled cavity array is demonstrated with magnetically coupling coils, where the sign of next-neighbour coupling (controlled with their chirality) sets the dispersion curve properties of the resonator array medium. Furthermore, we show that similar effects can be achieved using only positively coupled cavities of different frequencies assembled in periodic cells. This principle is demonstrated for the multi-post re-entrant system, which can be realised with an array of straight metallic rods organised in chiral structures.

Original languageEnglish
Pages (from-to)2199-2204
Number of pages6
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Issue number33
Publication statusPublished - 25 Aug 2018

Fingerprint Dive into the research topics of 'Axion detection with negatively coupled cavity arrays'. Together they form a unique fingerprint.

Cite this