Microfabricated water immersion zone plate optical tweezer

Schonbrun, Ethan; Rinzler, Charles Cooper; Crozier, Kenneth B.

doi:10.1063/1.2837538

Cited by 45 publications

(38 citation statements)

References 14 publications

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“…Optical trapping and manipulation of micron-sized objects are becoming increasingly important techniques in biotechnology and micro-fabrication due to their noncontact nature and inherent high precision [1][2][3][4][5]. Stable trapping of nanoparticles (<100 nm), however, still remains a major challenge as high optical power is required using either free space optics or evanescent trapping configurations, a consequence of the rapid decrease of optical force when scaling down the particle size.…”

Section: Introductionmentioning

confidence: 99%

Optical trapping of dielectric nanoparticles in resonant cavities

Lin

Kimerling

et al. 2010

Phys. Rev. A

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We theoretically investigate the opto-mechanical interactions between a dielectric nanoparticle and the resonantly enhanced optical field inside a high Q, small-mode-volume optical cavity. We develop an analytical method based on open system analysis to account for the resonant perturbation due to particle introduction and predict trapping potential in good agreement with three-dimensional (3D) finite-difference time-domain (FDTD) numerical simulations. Strong size-dependent trapping dynamics distinctly different from free-space optical tweezers arise as a consequence of the finite cavity perturbation. We illustrate single nanoparticle trapping from an ensemble of monodispersed particles based on size-dependent trapping dynamics. We further discover that the failure of the conventional dipole approximation in the case of resonant cavity trapping originates from a new perturbation interaction mechanism between trapped particles and spatially localized photons.

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Section: Introductionmentioning

confidence: 99%

Optical trapping of dielectric nanoparticles in resonant cavities

Lin

Kimerling

et al. 2010

Phys. Rev. A

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“…24,25 We encode these two phase functions using an array of nanowires, each of which is one of the four elliptical nanowires described previously. We first investigate a nanowire lens whose focal length depends on the incident polarization.…”

Section: Nano Lettersmentioning

confidence: 99%

Reconfigurable Imaging Systems Using Elliptical Nanowires

2011

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Materials that have subwavelength structure can add degrees of freedom to optical system design that are not possible with bulk materials. We demonstrate two lenses that are composed out of lithographically patterned arrays of elliptical cross-section silicon nanowires, which can dynamically reconfigure their imaging properties in response to the polarization of the illumination. In each element, two different focusing functions are polarization encoded into a single lens. The first nanowire lens has a different focal length for each linear polarization state, thereby realizing the front end of a nonmechanical zoom imaging system. The second nanowire lens has a different optical axis for each linear polarization state, demonstrating stereoscopic image capture from a single physical aperture.

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“…values as high as 1.31 has been accomplished. 49 Since Fresnel zone plates are fabricated on a planar surface, it also provides a simple interface for integration with microfluidic components, unlike other refractive optics based lenses that typically have curved surfaces. 50,51 Schonbrun et al have demonstrated a high N.A.…”

Section: Introductionmentioning

confidence: 99%

Three dimensional microfluidics with embedded microball lenses for parallel and high throughput multicolor fluorescence detection

Fan

Chen

et al. 2013

Biomicrofluidics

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We report a 3D microfluidic device with 32 detection channels and 64 sheath flow channels and embedded microball lens array for high throughput multicolor fluorescence detection. A throughput of 358 400 cells/s has been accomplished. This device is realized by utilizing solid immersion micro ball lens arrays for high sensitivity and parallel fluorescence detection. High refractive index micro ball lenses (n = 2.1) are embedded underneath PDMS channels close to cell detection zones in channels. This design permits patterning high N.A. micro ball lenses in a compact fashion for parallel fluorescence detection on a small footprint device. This device also utilizes 3D microfluidic fabrication to address fluid routing issues in two-dimensional parallel sheath focusing and allows simultaneous pumping of 32 sample channels and 64 sheath flow channels with only two inlets.

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Microfabricated water immersion zone plate optical tweezer

Cited by 45 publications

References 14 publications

Optical trapping of dielectric nanoparticles in resonant cavities

Optical trapping of dielectric nanoparticles in resonant cavities

Reconfigurable Imaging Systems Using Elliptical Nanowires

Three dimensional microfluidics with embedded microball lenses for parallel and high throughput multicolor fluorescence detection

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