000227342 001__ 227342
000227342 005__ 20190317000657.0
000227342 0247_ $$2doi$$a10.1016/j.jmr.2017.03.013
000227342 022__ $$a1090-7807
000227342 02470 $$2ISI$$a000400723900013
000227342 037__ $$aARTICLE
000227342 245__ $$aSingle-chip electron spin resonance detectors operating at 50 GHz, 92 GHz, and 146 GHz
000227342 260__ $$bAcademic Press Inc Elsevier Science$$c2017$$aSan Diego
000227342 269__ $$a2017
000227342 300__ $$a9
000227342 336__ $$aJournal Articles
000227342 520__ $$aWe report on the design and characterization of single-chip electron spin resonance (ESR) detectors operating at 50 GHz, 92 GHz, and 146 GHz. The core of the single-chip ESR detectors is an integrated LC-oscillator, formed by a single turn aluminum planar coil, a metal-oxide-metal capacitor, and two metal-oxide semiconductor field effect transistors used as negative resistance network. On the same chip, a second, nominally identical, LC-oscillator together with a mixer and an output buffer are also integrated. Thanks to the slightly asymmetric capacitance of the mixer inputs, a signal at a few hundreds of MHz is obtained at the output of the mixer. The mixer is used for frequency down-conversion, with the aim to obtain an output signal at a frequency easily manageable off-chip. The coil diameters are 120 μm, 70 μm, and 45 μm for the U-band, W-band, and the D-band oscillators, respectively. The experimental frequency noises at 100 kHz offset from the carrier are 90 Hz/Hz1/2, 300 Hz/Hz1/2, and 700 Hz/Hz1/2 at 300 K, respectively. The ESR spectra are obtained by measuring the frequency variations of the single-chip oscillators as a function of the applied magnetic field. The experimental spin sensitivities, as measured with a sample of α,γ-bisdiphenylene-β-phenylallyl (BDPA)/benzene complex, are 1 × 108 spins/Hz1/2, 4 × 107 spins/Hz1/2, 2 × 107 spins/Hz1/2 at 300 K, respectively. We also show the possibility to perform experiments up to 360 GHz by means of the higher harmonics in the microwave field produced by the integrated single-chip LC-oscillators.
000227342 6531_ $$aESR
000227342 6531_ $$aCMOS
000227342 6531_ $$aLC-oscillator
000227342 700__ $$0247467$$g229906$$aMatheoud, Alessandro Valentino
000227342 700__ $$0245977$$g206755$$aGualco, Gabriele
000227342 700__ $$aJeong, Minki
000227342 700__ $$0248777$$g178470$$aZivkovic, Ivica
000227342 700__ $$0240120$$g145781$$aBrugger, Jürgen
000227342 700__ $$aRønnow, Henrik M.$$g176429$$0243430
000227342 700__ $$aAnders, Jens
000227342 700__ $$aBoero, Giovanni$$g110635$$0240034
000227342 773__ $$j278$$tJournal of Magnetic Resonance$$q113-121
000227342 8564_ $$uhttps://infoscience.epfl.ch/record/227342/files/FinalVersion.pdf$$zPublisher's version$$s992579$$yPublisher's version
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000227342 937__ $$aEPFL-ARTICLE-227342
000227342 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000227342 980__ $$aARTICLE