Electronically-controlled optical tweezing using space-time-wavelength mapping

Rahman, Shah; Torun, Rasul; Zhao, Qiancheng; Atasever, Tuva; Boyraz, Özdal

doi:10.1117/12.2192487

Cited by 1 publication

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“…This technique has previously been utilized for real time imaging and detection of micro particles, real time wide field microscopy, arbitrary waveform generation, in photonic time--stretched analog--to--digital converters, waveform digitizers, and in investigation of optical rogue waves [26--35]. In this paper, we build up on our previous study [25], and present further details and applications of the STWM technique in optical tweezing. In this technique, time--domain modulation of power spectral density is used to manipulate the intensity gradient at the focal plane of a laser beam, which in turn controls the 2--D force profile at the focal plane of the beam.…”

Section: Introductionmentioning

confidence: 99%

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Electronic control of optical tweezers using space-time-wavelength mapping

et al. 2016

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We present a new approach for electronic control of optical tweezers by using space--time--wavelength mapping (STWM), a technique that uses time--domain modulation to control local intensity values, and hence the resulting optical force, in space. The proposed technique enables direct control of magnitude, location, and polarity of force hot--spots created by Lorentz force (gradient force). In this paper, we develop an analytical formulation of the proposed STWM technique for optical tweezing. In the case study presented here, we show that 150 fs optical pulses are dispersed in time and space to achieve a focused elliptical beam that is ~20 μm long and ~2 μm wide. By choosing the appropriate RF waveform and electro--optic modulator, we can generate multiple hot--spots with >200 pN force per pulse.

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Section: Introductionmentioning

confidence: 99%

“…Here, we introduce electronic control of optical tweezing by using space--time--wavelength mapping (STWM) technology [25]. We show that STWM is a powerful approach for creating desired intensity gradients in a 2--D focal plane and for providing direct control of the force field acting on particles.…”

Section: Introductionmentioning

confidence: 99%