Scanning optical homodyne detection of high-frequency picoscale resonances in cantilever and tuning fork sensors

Zeltzer, Gabriel; Randel, Jason C.; Gupta, Amit; Bashir, Rashid; Song, Sang-Hun; Manoharan, Hari C.

doi:10.1063/1.2803774

Cited by 12 publications

(7 citation statements)

References 17 publications

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“…The simplest way to meet the T 2 ≫ T condition is to use a mechanical oscillator with a higher resonance frequency. Alternatively, as demonstrated in this work, a higher mechanical mode of the tuning fork can be employed 45 . High-frequency detection has the added advantage that the interval between π -pulses (given by 1/(2 f TF )) becomes very short, which makes dynamical decoupling more efficient and in turn leads to improved sensitivity 42 , 46 .…”

Section: Resultsmentioning

confidence: 99%

Scanning gradiometry with a single spin quantum magnetometer

et al. 2022

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Quantum sensors based on spin defects in diamond have recently enabled detailed imaging of nanoscale magnetic patterns, such as chiral spin textures, two-dimensional ferromagnets, or superconducting vortices, based on a measurement of the static magnetic stray field. Here, we demonstrate a gradiometry technique that significantly enhances the measurement sensitivity of such static fields, leading to new opportunities in the imaging of weakly magnetic systems. Our method relies on the mechanical oscillation of a single nitrogen-vacancy center at the tip of a scanning diamond probe, which up-converts the local spatial gradients into ac magnetic fields enabling the use of sensitive ac quantum protocols. We show that gradiometry provides important advantages over static field imaging: (i) an order-of-magnitude better sensitivity, (ii) a more localized and sharper image, and (iii) a strong suppression of field drifts. We demonstrate the capabilities of gradiometry by imaging the nanotesla fields appearing above topographic defects and atomic steps in an antiferromagnet, direct currents in a graphene device, and para- and diamagnetic metals.

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Section: Resultsmentioning

confidence: 99%

Scanning gradiometry with a single spin quantum magnetometer

et al. 2022

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“…To fully understand and quantitatively demonstrate the position-dependent nature of the multimode resonance spectra, we now focus on measuring the peak amplitude of each of the five resonance modes, while scanning the laser spot throughout the device area (that is, the so-called scanning spectromicroscopy) 33,34 . The left panels in Fig.…”

Section: Resultsmentioning

confidence: 99%

Spatial mapping of multimode Brownian motions in high-frequency silicon carbide microdisk resonators

2014

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High-order and multiple modes in high-frequency micro/nanomechanical resonators are attractive for empowering signal processing and sensing with multi-modalities, yet many challenges remain in identifying and manipulating these modes, and in developing constitutive materials and structures that efficiently support high-order modes. Here we demonstrate high-frequency multimode silicon carbide microdisk resonators and spatial mapping of the intrinsic Brownian thermomechanical vibrations, up to the ninth flexural mode, with displacement sensitivities of B7 À 14 fm Hz À 1/2 . The microdisks are made in a 500-nm-carbide on 500-nm-oxide thin-film technology that facilitates ultrasensitive motion detection via scanning laser interferometry with high spectral and spatial resolutions. Mapping of these thermomechanical vibrations vividly visualizes the shapes and textures of high-order Brownian motions in the microdisks. Measurements on devices with varying dimensions provide deterministic information for precisely identifying the mode sequence and characteristics, and for examining mode degeneracy, spatial asymmetry and other effects, which can be exploited for encoding information with increasing complexity.

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“…Detection using high-harmonic frequencies Atomic force microscope (AFM) with the microcantilever as central nowadays is becoming a conventional device in the detection of micro to nano-objects that helps to reveal the physical and chemical properties in nanoscale. [1][2][3][4][5] Several studies have been adopted to enhance the functionality of the cantilever via changing its cross-section materials [6][7][8][9][10] and dimensions [11][12][13][14][15] and revealed that the sensitivity of the cantilever sensor could be enhanced if higher modes of oscillation are used [16][17][18][19] and the quality factor could be increased, especially when functioned in liquids. 20,21) This is explained by the fact that the surface-to-bulk ratio is lower at higher-order modes, which leads to lower air/fluid damping.…”

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confidence: 99%

Tuning the flexural frequency of overhang-/T-shaped microcantilevers for high harmonics

Dat,

Cuong Nguyen,

Duy Vy

et al. 2023

Jpn. J. Appl. Phys.

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High-harmonic (HH) frequencies in microcantilever impose several applications in precision detection thanks to the higher sensitivity of the higher modes in comparison to the fundamental modes. In this study, we showed that by tuning the cantilever length via changing the clamped position, the dimensional ratio of the overhang to the main cantilever part is altered and the HHs could be effectively obtained. Multiple HH frequencies have been achieved, from 4th to 8th order of the second- and from 11th to 26th order of the third-mechanical mode versus the first mode, and these orders are much higher if higher modes are used. The analytical calculation is in agreement with available results of other groups. HH behavior when the cantilever is interaction with sample is also examined and is strongly depending on the overhang parameters. These results could guide the experimentalist in the tuning and controlling of the HHs in detecting objects.

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Scanning optical homodyne detection of high-frequency picoscale resonances in cantilever and tuning fork sensors

Cited by 12 publications

References 17 publications

Scanning gradiometry with a single spin quantum magnetometer

Scanning gradiometry with a single spin quantum magnetometer

Spatial mapping of multimode Brownian motions in high-frequency silicon carbide microdisk resonators

Tuning the flexural frequency of overhang-/T-shaped microcantilevers for high harmonics

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