Microsphere-chain waveguides: Focusing and transport properties

Allen, Kenneth W.; Darafsheh, Arash; Abolmaali, Farzaneh; Mojaverian, Neda; Limberopoulos, Nicholaos I.; Lupu, Anatole; Astratov, Vasily N.

doi:10.1063/1.4890595

Cited by 49 publications

(24 citation statements)

References 28 publications

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“…It has been shown that by using microsphere-chain waveguides [24,25] focusing and resolutions can improved. Microsphere near-field nano-structures were observed and analyzed using picosecond pulses [26].…”

Section: Introductionmentioning

confidence: 99%

Nano-jet related to Bessel beams and to super-resolutions in microsphere optical experiments

Ben‐Aryeh

2017

EPJ Techn Instrum

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The appearance of a Nano-jet in the microsphere optical experiments is analyzed by relating this effect to non-diffracting Bessel beams. By inserting a circular aperture with a radius of subwavelength dimension in the EM waist, and sending the transmitted light into a confocal microscope, the EM oscillations by the different Bessel beams are avoided. On this constant EM field evanescent waves are superposed. While this effect improves the optical-depth of the imaging process, the object fine-structures are obtained, from the modulation of the EM fields by the evanescent waves. The use of a combination of the microsphere optical system with an interferometer for phase contrast measurements is described.

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Section: Introductionmentioning

confidence: 99%

Nano-jet related to Bessel beams and to super-resolutions in microsphere optical experiments

Ben‐Aryeh

2017

EPJ Techn Instrum

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“…The linear chains or arrays of resonant spheres can be used as coupled resonator optical waveguides, high-order spectral filters or sensor devices with the engineered photonic band structures and optical properties. [26][27][28][29][30][31][32][33][34][35] Developing this photonic technology based on using photonic atoms with uniquely identical resonant properties requires knowledge of the spectral shape of the optical propulsion peaks. To perform these studies, in this work we developed a method to precisely control the wavelength detuning between the laser emission line and WGMs in individual microspheres.…”

Section: Introductionmentioning

confidence: 99%

Spectral control and temporal properties of resonant optical propulsion of dielectric microspheres in evanescent fiber couplers

Maslov²,

Astratov

2014

SPIE Proceedings

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Resonant light pressure effects provide new degrees of freedom for optical manipulation of microparticles. In particular, they can be used for optical sorting of photonic atoms with extraordinary uniform resonant properties. These atoms can be used as building blocks of structures and devices with engineered photonic dispersions. To study the spectral shape of the force peaks, we developed a method to precisely control the wavelength detuning between the tunable laser emission line and central position of the whispering gallery mode (WGM) peaks in tapered fiber-to-microsphere water-immersed couplers. Our method is achieved by integrating optical tweezers to individually manipulate microspheres and based on preliminary spectral characterization of WGM peak positions followed by setting a precise amount of laser wavelength detuning for optical propulsion experiments. We demonstrated dramatic enhancement of the optical forces exerted on 20 μm polystyrene spheres under resonant conditions. Spectral properties of the resonant force enhancement were studies with controlled laser line detuning. In addition, we observed the dynamics of radial trapping and longitudinal propelling process and analyzed their temporal properties. Our studies also demonstrated a stable radial trapping of microspheres near the surface of tapered fiber for high speed resonant optical propulsion along the fiber.

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“…Over the course of the past decade there has been significant development in regards to the fundamental properties and potential applications of photonic nanojets (PNJs) [1][2][3] and nanojet-induced modes (NIMs) [4][5][6][7][8][9][10], spanning the areas from biomedical optics to super-resolution imaging [11,12]. Dielectric microspheres provide strong concentration of electromagnetic power which can be used for ultraprecise surgery and for increasing the sensitivity of the photodetector devices [13].…”

Section: Introductionmentioning

confidence: 99%

Photonic jets for strained-layer superlattice infrared photodetector enhancement

Allen

Duran

Ariyawansa

et al. 2014

NAECON 2014 - IEEE National Aerospace and Electronics Conference

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Photonic jets are light beams focused by dielectric microspheres down to subwavelength dimensions. In this work we show that they can be used for enhancing performance of strained-layer superlattice (SLS) infrared (IR) photodiodes in the midwave-infrared spectral band (3-5 μm). We optimized the design of these structures and experimentally demonstrated the increased sensitivity compared to conventional photodetectors.

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Microsphere-chain waveguides: Focusing and transport properties

Cited by 49 publications

References 28 publications

Nano-jet related to Bessel beams and to super-resolutions in microsphere optical experiments

Nano-jet related to Bessel beams and to super-resolutions in microsphere optical experiments

Spectral control and temporal properties of resonant optical propulsion of dielectric microspheres in evanescent fiber couplers

Photonic jets for strained-layer superlattice infrared photodetector enhancement

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