Generating arbitrary photoacoustic fields with a spatial light modulator

Wei, Tian; Guo, Honglian; Lu, Jiuyang; Huang, Xueqin; Deng, Weiyin; Li, Feng; Liu, Zhengyou

doi:10.1364/ol.44.003206

Cited by 10 publications

(4 citation statements)

References 12 publications

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“…While this may be done by physical elements [11,12], this technique is largely inflexible since the patterns are static. The use of patterned holograms, by means of spatial light modulators (SLMs), has also shown to be an effective method of modifying acoustic wavefront propagation [13,14,15,16], however this relies on large illumination footprints and often necessitates the use of many acoustic cycles, thus eliminating the axial resolution benefits of single-oscillation pulses. Photoacoustic phase modulation can be carried out by temporal modulation of the incident laser pulses.…”

Section: Introductionmentioning

confidence: 99%

Tailored Photoacoustic Apertures with Superimposed Optical Holograms

Howe

Tang

Rowlands

2023

Preprint

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A new method of generating potentially arbitrary photoacoustic wavefronts with optical holograms is presented. This method uses nanosecond laser pulses at 1064 nm that are split into four time-delayed components by means of a configurable multipass optical delay apparatus which serves to map the pulses onto phase-delayed regions of a given acoustic wavefront. A single spatial light modulator generates separate holograms for each component which are imaged onto a photoacoustic transducer comprised of a thermoelastic polymer. The spatially- and temporally-modulated holograms facilitate a phased array effect which enables beam steering of the resulting acoustic pulse. For a first experimental demonstration of the method, as verified by simulation, an acoustic beam is steered in four directions by around 5 degrees.

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Section: Introductionmentioning

confidence: 99%

Tailored Photoacoustic Apertures with Superimposed Optical Holograms

Howe

Tang

Rowlands

2023

Preprint

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show abstract

“…While this may be done by physical elements [ 11 , 12 ], this technique is largely inflexible since the patterns are static. The use of patterned holograms, by means of spatial light modulators (SLMs), has also shown to be an effective method of modifying acoustic wavefront propagation [ 13 – 16 ], however this relies on large illumination footprints and often necessitates the use of many acoustic cycles, thus eliminating the axial resolution benefits of single-oscillation pulses.…”

Section: Introductionmentioning

confidence: 99%

Tailored photoacoustic apertures with superimposed optical holograms

Howe,

Tang,

Rowlands

2023

Biomed. Opt. Express

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A new method of generating potentially arbitrary photoacoustic wavefronts with optical holograms is presented. This method uses nanosecond laser pulses at 1064 nm that are split into four time-delayed components by means of a configurable multipass optical delay apparatus, which serves to map the pulses onto phase-delayed regions of a given acoustic wavefront. A single spatial light modulator generates separate holograms for each component, which are imaged onto a photoacoustic transducer comprised of a thermoelastic polymer. As a proof of concept of the broader arbitrary wavefront construction technique, the spatially- and temporally-modulated holograms in this study produce a phased array effect that enables beam steering of the resulting acoustic pulse. For a first experimental demonstration of the method, as verified by simulation, the acoustic beam is steered in four directions by around 5 degrees.

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“…While integrating optical and acoustic trapping methods can offer more advantages than using them individually [36][37][38][39][40] , the fixed trapping positions limit the flexibility of this approach. In the pursuit of flexible and precise manipulations, photoacoustic effect-based tweezers have been proposed 41,42 . This type of tweezers utilizes optically generated acoustic radiation to drive microparticles.…”

mentioning

confidence: 99%

Programmable photoacoustic patterning of microparticles in air

Zhang,

Zhao,

et al. 2024

Nat Commun

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Optical and acoustic tweezers, despite operating on different physical principles, offer non-contact manipulation of microscopic and mesoscopic objects, making them essential in fields like cell biology, medicine, and nanotechnology. The advantages and limitations of optical and acoustic manipulation complement each other, particularly in terms of trapping size, force intensity, and flexibility. We use photoacoustic effects to generate localized Lamb wave fields capable of mapping arbitrary laser pattern shapes. By using localized Lamb waves to vibrate the surface of the multilayer membrane, we can pattern tens of thousands of microscopic particles into the desired pattern simultaneously. Moreover, by quickly and successively adjusting the laser shape, microparticles flow dynamically along the corresponding elastic wave fields, creating a frame-by-frame animation. Our approach merges the programmable adaptability of optical tweezers with the potent manipulation capabilities of acoustic waves, paving the way for wave-based manipulation techniques, such as microparticle assembly, biological synthesis, and microsystems.

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Generating arbitrary photoacoustic fields with a spatial light modulator

Cited by 10 publications

References 12 publications

Tailored Photoacoustic Apertures with Superimposed Optical Holograms

Tailored Photoacoustic Apertures with Superimposed Optical Holograms

Tailored photoacoustic apertures with superimposed optical holograms

Programmable photoacoustic patterning of microparticles in air

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