Resonant slot nanoantennas for surface plasmon radiation in optical frequency range Appl. Phys. Lett. 100, 241115 (2012); 10.1063/1.4729552Experimental realization of all-dielectric composite cubes/rods left-handed metamaterial
Nitrogen vacancy (NV) centers in diamond have developed into a powerful solid-state platform for compact quantum sensors. Here, we compare different DC magnetometry methods like, e.g. continuous-wave optically detected magnetic resonance (CW-ODMR) and continuously excited (CE-) Ramsey measurements combined with lock-in detection to achieve high sensitivity using low optical excitation intensities. We achieve a sensitivity of 0.5 pT/Hz 1/2 while retaining mm sized sensor form. We also demonstrate a gradiometer set up which achieves pT sensitivity in unshielded environments. Combined with previous efforts on the diamond AC magnetometry, the diamond magnetometer is promising to perform as a full range magnetometer with pT-fT sensitivity and mm 3 sensing volume in ambient environments.
I. INTRODUCTIONQuantum sensors have made extraordinary progress in sensitivity, precision, bandwidth, spatial and temporal resolution over the past years [1][2][3][4]. This has enabled highly precise
Structure and electrical properties at radio frequencies as well as within the 3.5-35 GHz frequency range have been investigated for ceramic samples of the (1 − y)(Ba x Sr 1−x )TiO 3 ·yMgO (BSM) system where x = 0.4-0.6; y = 0.15-0.30. For the compositions studied the bulk ferroelectrics were synthesized with the dielectric constant of 400-600 and high tunability coefficient. We indicated that the quality factor of the samples was in the range of 100-1000 within the frequency band of 3.5-35 GHz. The phase correlations and unit cell constants of the perovskite phase of the BSM samples were studied. The low loss factor and high tunability of the bulk material allowed us using the BSM ferroelectric ceramic layer for tunable accelerating structures of the Argonne Dielectric Wakefield Accelerator and for high power switches design and development for the future linear colliders.
We demonstrate experimentally Fano resonances in all-dielectric oligomers clusters of dielectric particles. We study two structures consisting of a ring of six ceramic spheres with and without a central particle and demonstrate that both structures exhibit resonant suppression of the forward scattering associated with the Fano resonance originated from the excitation of magnetic dipole modes. By employing the near-field measurement techniques, we establish the relation between near- and far-field properties of the Fano resonances and identify directly their origin. We support our findings by an analytical approach based on the discrete-dipole approximation and find an excellent agreement with the experimental data.
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