A fiber based diamond RF B-field sensor and characterization of a small helical antenna

Abstract

We present a microwave B-field scanning imaging technique using diamond microcrystal containing nitrogen vacancy center that is attached to a fiber tip. We propose a pulsed modulation technique, enabling the implementation of a variety of pulsed quantum algorithm for state manipulation and fast readout of spin state. A detailed mapping of the magnetic B-field distribution of a helical antenna with sub-100 micron resolution is presented and compared with numerical simulations. This fiber based microwave B-field probe has the advantage of minimized invasiveness, small overall size, will boost broad interest in a variety of applications where near field distribution is essential to device characterization, to name a few, antenna radiation profiling, monolithic microwave integrated circuits failure diagnosis, electromagnetic compatibility test of microwave integrated circuits and microwave cavity field mode mapping.

Quantum near field probe for integrated circuits electromagnetic interference at wafer level

“…According to Biot-Savart Law, 24 the magnetic induction B ! at a certain point near the chip surface can be calculated by integrating the magnetic induction components at that point generated from current elements of different sections, as Equation (1), where Id l ! , e r !…”

“…At the same time, highly integrated and complex ICs bring emerging demands for IC EMI test. 1 It is difficult for existing techniques to figure out the EMI path at single die level due to its limited spatial resolution and working frequency ranges. 2,3 Especially when the chips are integrated at an extremely high density, or packed as a microsystem, problems of electromagnetic compatibility and verification is an issue of central significance.…”

Experimental study on the characteristics of near‐field distribution of chips based on nano‐diamond quantum magnetometer

“…At a certain resonance frequency, the length of the microwave pulse in the linear region is measured by a Rabi oscillation experiment to ensure that the field strength of the chip under test has a linear relationship with the intensity of the fluorescent signal. 18 The procedure of this method included four steps: Optical focusing, frequency tuning, fluorescence (FL) data collection and imaging reconstruction. First, the scanning system is optically focused.…”

Optimized Planar Microwave Antenna for Nitrogen Vacancy Center Based Sensing Applications

“…Stripline antennas tend to be large in size and overload piezo scanners in confocal microscopes when placed on top [ 43 , 44 , 45 , 46 ]. Coil antennas only radiate MW of low amplitude [ 47 , 48 , 49 ]. Resonators are limited in bandwidth [ 50 , 51 , 52 , 53 , 54 , 55 , 56 ].…”