2022
DOI: 10.1021/acs.nanolett.1c03890
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Multimode Optomechanical Weighting of a Single Nanoparticle

Abstract: We demonstrate multimode optomechanical sensing of individual nanoparticles with a radius between 75 and 150 nm. A semiconductor optomechanical disk resonator is optically driven and detected under ambient conditions, as nebulized nanoparticles land on it. Multiple mechanical and optical resonant signals of the disk are tracked simultaneously, providing access to several pieces of physical information about the landing analyte in real time. Thanks to a fast camera registering the time and position of landing, … Show more

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Cited by 12 publications
(9 citation statements)
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References 28 publications
(47 reference statements)
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“…The signal-to-noise ratios (i.e., the ratios between the peak top level and the noise floor level) are 3.2 and 1.7, which result in displacement sensitivity (i.e., the minimum detectable displacement) of 4.5 × 10 −18 normalm/Hz in our optomechanical setup and temperature condition [25°C for both the room (air) and water]. This sensitivity is on a level similar to that in microdisks ( 7 , 10 , 12 ) and microcapillaries ( 5 , 6 , 8 ) and will be further improved by constructing a balanced homodyne interferometer ( 35 ). Combining the efficient transduction between two mechanical modes and the strong optomechanical coupling enables us to detect the thermal motion when the TMBR is immersed in liquid.…”
Section: Resultsmentioning
confidence: 76%
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“…The signal-to-noise ratios (i.e., the ratios between the peak top level and the noise floor level) are 3.2 and 1.7, which result in displacement sensitivity (i.e., the minimum detectable displacement) of 4.5 × 10 −18 normalm/Hz in our optomechanical setup and temperature condition [25°C for both the room (air) and water]. This sensitivity is on a level similar to that in microdisks ( 7 , 10 , 12 ) and microcapillaries ( 5 , 6 , 8 ) and will be further improved by constructing a balanced homodyne interferometer ( 35 ). Combining the efficient transduction between two mechanical modes and the strong optomechanical coupling enables us to detect the thermal motion when the TMBR is immersed in liquid.…”
Section: Resultsmentioning
confidence: 76%
“…Recently, two innovative optomechanical approaches have been demonstrated to maintain the optical sensitivity ( 5 , 8 , 10 , 12 ). The first approach is based on a glass microcapillary.…”
Section: Introductionmentioning
confidence: 99%
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“… 23 . The co-existence of optical and mechanical modes in the structure provides a dual detection approach for an analyte that would land on the disk 24 . In our experiments, this landing analyte is additionally imaged in real-time thanks to a ×100 magnification microscope objective coupled to a fast camera with 1 kHz frame acquisition rate.…”
Section: Resultsmentioning
confidence: 99%