KEYWORDS: Diamond, Chemical species, Absorption, Quantum physics, Thin films, Signal to noise ratio, Signal detection, Sensors, Microwave radiation, Tolerancing
Nitrogen-vacancy (NV) pair in diamond has been widely investigated due to its profound quantum properties even at relatively higher temperature compared with those materials having to satisfy strict cryogenic conditions to display quantum states. Spin properties of NV center in diamond can be tuned by external electromagnetic radiations, which leads to its application in detecting microwave signals. Here in this work, density functional theory (DFT) method has been used to analyze electronic properties of diamond with NV centers with the aim of utilizing it for detecting very weak microwave radiations from electron cryotron radiations, to ultimately determine neutrino mass.
A scanning white light interferometer can characterize out of plane features and motion in M(N)EMS devices. Like any
other form and displacement measuring instrument, the scanning interferometer results should be linked to the metre
definition to be comparable and unambiguous. Traceability is built up by careful error characterization and calibration of
the interferometer. The main challenge in this calibration is to have a reference device producing accurate and
reproducible dynamic out-of-plane displacement when submitted to standard loads. We use a flat mirror attached to a
piezoelectric transducer for static and (quasi)dynamic calibration of a stroboscopic scanning light interferometer. First
we calibrated the piezo-scanned flexure guided transducer stage using a symmetric differential heterodyne laser
interferometer developed at the Centre for Metrology and Accreditation (MIKES). The standard uncertainty of the piezo
stage motion calibration was 3.0 nm. Then we used the piezo-stage as a transfer standard to calibrate our stroboscopic
interferometer whose light source was pulsed at 200 Hz and 400 Hz with 0.5% duty cycle. We measured the static
position and (quasi)dynamic motion of the attached mirror relative to a reference surface. This methodology permits
calibrating the vertical scale of the stroboscopic scanning white light interferometer.
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