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Papers by Mark Cronin-golomb

Research paper thumbnail of Imaging microscopic viscosity with confocal scanning optical tweezers

Research paper thumbnail of Microscopic flow measurements with optically trapped microprobes

Research paper thumbnail of Measuring microscopic viscosity with optical tweezers as a confocal probe

Research paper thumbnail of Efficient self-aligning multibeam coupling into a single-mode fiber

Journal of Lightwave Technology, 1995

Research paper thumbnail of Compact microfluidic refractometer

2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference

1. Introduction Microfluidics, the emerging science of fluids constrained on the micron scale, ha... more 1. Introduction Microfluidics, the emerging science of fluids constrained on the micron scale, has found increasing application in a diverse range of fields. One such field is lab-on-a-chip, where large volume laboratory diagnostic and reaction processes are miniaturized into a planar environment. Such processes include DNA amplification [1], explosives [2] and pathogen [3] detection. A useful parameter the measure in such detections is the refractive index of the fluids inside the microfluidic device. Refractive index is potentially indicative of a variety of ...

Research paper thumbnail of Femtosecond two-beam coupling and temporal encoding in barium titanate

Research paper thumbnail of Grating competition in photorefractive crystals

Research paper thumbnail of Bidirectional oscillation and phase conjugation in a sodium-vapor ring resonator

Research paper thumbnail of Optical self-focusing in photorefractive crystals and its compensation by a self-pumped phase conjugator

Conference on Lasers and Electro-Optics

Research paper thumbnail of Applications of forgiving coherence length requirements in passive phase conjugate mirrors

Conference on Lasers and Electro-Optics

Research paper thumbnail of Optical Tweezers and Optofluidics

2006 Digest of the LEOS Summer Topical Meetings, 2006

First, we fabricated a variable optical attenuator by using a dicing saw to cut a microfluidic ch... more First, we fabricated a variable optical attenuator by using a dicing saw to cut a microfluidic channel across a single mode fiber embedded in UV-cured photo-polymer (NOA-61 from Norland Optical Adhesives) on a 700μm thick glass substrate. The resulting microfluidic channel was loaded with a 50μl drop of a 0.1mg/ml suspension of 20μm diameter silica microspheres (Kisker-biotech GbR) and sealed with adhesive tape. The device was mounted on an inverted optical tweezers microscope equipped with a piezoelectric stage. A NdVO4 laser provided the optical ...

Research paper thumbnail of Companding nonlinearities in optical signal processing

Proceedings of LEOS'94, 1994

ABSTRACT

Research paper thumbnail of Silk fibroin-based Active Optofluidics

The ancient silk fiber finds resurgence in a new paradigm of highly functional optofluidic device... more The ancient silk fiber finds resurgence in a new paradigm of highly functional optofluidic devices embodied by an active oxygenation sensor comprising a hemoglobin infused cast silk integrated diffraction grating for spectral analysis.

Research paper thumbnail of Optically trapped silica micro-fibers

ACOFT/AOS 2006 - Australian Conference on Optical Fibre Technology/Australian Optical Society, 2006

Page 1. 39 ISBN 0 –9775657– 0 –X ACOFT/AOS 2006 – Proceedings Melbourne, Australia, 10 – 13 July ... more Page 1. 39 ISBN 0 –9775657– 0 –X ACOFT/AOS 2006 – Proceedings Melbourne, Australia, 10 – 13 July 2006 Optically Trapped Silica Micro-fibers Peter Domachuk, Eric C. Magi, Mark Cronin-Golomb*, Benjamin J. Eggleton CUDOS, School of Physics, University of Sydney, Sydney, NSW, 2006, Australia *Dept. of Biomedical Engineering, Tufts University, Medford, MA, 02155, USA Abstract — We introduce a new type of optical MEMS through an optical micro-fiber waveguide controlled using optical trapping. ...

Research paper thumbnail of Investigation of Millimeter Wave Parametric Generation from a THz Photonic Band Gap Device

2006 IEEE Aerospace Conference, 2006

We present 1,2 a photonic band gap (PBG) structure design for terahertz (THz) wave parametric gen... more We present 1,2 a photonic band gap (PBG) structure design for terahertz (THz) wave parametric generation, which has crystal layer fabrication tolerance of a few micrometers and can be made with traditional polishing methods. This PBG structure consists of two component materials with a small refractive index difference at near infrared pump wavelengths and a large refractive index difference for THz waves. With this design the PBG device has optical properties very close to that of a bulk crystal in the near infrared, but photonic crystal features in the THz range, such as structural dispersion, which allows placement of the phase matched pump wavelength in the near infrared to eliminate two-photon absorption of the pump and signal beams. The added design flexibility also allows the use of the most efficient crystal orientations. Potential applications of this THz PBG structure are discussed.

Research paper thumbnail of Wave propagation in photorefractive media

Topics in Applied Physics, 1989

Research paper thumbnail of High-resolution nanomechanical analysis of suspended electrospun silk fibers with the torsional harmonic atomic force microscope

Beilstein journal of nanotechnology, 2013

Atomic force microscopes have become indispensable tools for mechanical characterization of nanos... more Atomic force microscopes have become indispensable tools for mechanical characterization of nanoscale and submicron structures. However, materials with complex geometries, such as electrospun fiber networks used for tissue scaffolds, still pose challenges due to the influence of tension and bending modulus on the response of the suspended structures. Here we report mechanical measurements on electrospun silk fibers with various treatments that allow discriminating among the different mechanisms that determine the mechanical behavior of these complex structures. In particular we were able to identify the role of tension and boundary conditions (pinned versus clamped) in determining the mechanical response of electrospun silk fibers. Our findings show that high-resolution mechanical imaging with torsional harmonic atomic force microscopy provides a reliable method to investigate the mechanics of materials with complex geometries.

Research paper thumbnail of Use of Optical Tweezers to Fabricate Tunable Filters in Photonic Crystal Fibers

2007 Conference on Lasers and Electro-Optics (CLEO), 2007

Tunable optical filters are fabricated in hollow core photonic crystal fibers by using optical tw... more Tunable optical filters are fabricated in hollow core photonic crystal fibers by using optical tweezer beams directed transversely to the fiber to load and space silica microspheres in the fluid filled hollow core.

Research paper thumbnail of Optical Limiters Based on the Photorefractive Effect

Abstract : During the course of this research, the working environment at ORTEL made it possible ... more Abstract : During the course of this research, the working environment at ORTEL made it possible for another important line of research to develop: photorefractive self pumped phase conjugation of the near infrared radiation of GaA1As lasers near 850nm. The results of that research are included in this report. Real time holography with the photorefractive effect results in the coupling of the two writing beams together through the hologram such that one beam - image or reference - is amplified at the expense of the other. This amplification/deamplification effect may be used to build optical oscillators, many of which are self-pumped phase conjugate mirrors. The primary aim of this study was to attempt to optimize these effects with a view towards applying the deamplification effect in optical limiting.

Research paper thumbnail of Linear Stability Analysis of Photorefractive Four-Wave Mixing with Pumpdepletion

Research paper thumbnail of Imaging microscopic viscosity with confocal scanning optical tweezers

Research paper thumbnail of Microscopic flow measurements with optically trapped microprobes

Research paper thumbnail of Measuring microscopic viscosity with optical tweezers as a confocal probe

Research paper thumbnail of Efficient self-aligning multibeam coupling into a single-mode fiber

Journal of Lightwave Technology, 1995

Research paper thumbnail of Compact microfluidic refractometer

2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference

1. Introduction Microfluidics, the emerging science of fluids constrained on the micron scale, ha... more 1. Introduction Microfluidics, the emerging science of fluids constrained on the micron scale, has found increasing application in a diverse range of fields. One such field is lab-on-a-chip, where large volume laboratory diagnostic and reaction processes are miniaturized into a planar environment. Such processes include DNA amplification [1], explosives [2] and pathogen [3] detection. A useful parameter the measure in such detections is the refractive index of the fluids inside the microfluidic device. Refractive index is potentially indicative of a variety of ...

Research paper thumbnail of Femtosecond two-beam coupling and temporal encoding in barium titanate

Research paper thumbnail of Grating competition in photorefractive crystals

Research paper thumbnail of Bidirectional oscillation and phase conjugation in a sodium-vapor ring resonator

Research paper thumbnail of Optical self-focusing in photorefractive crystals and its compensation by a self-pumped phase conjugator

Conference on Lasers and Electro-Optics

Research paper thumbnail of Applications of forgiving coherence length requirements in passive phase conjugate mirrors

Conference on Lasers and Electro-Optics

Research paper thumbnail of Optical Tweezers and Optofluidics

2006 Digest of the LEOS Summer Topical Meetings, 2006

First, we fabricated a variable optical attenuator by using a dicing saw to cut a microfluidic ch... more First, we fabricated a variable optical attenuator by using a dicing saw to cut a microfluidic channel across a single mode fiber embedded in UV-cured photo-polymer (NOA-61 from Norland Optical Adhesives) on a 700μm thick glass substrate. The resulting microfluidic channel was loaded with a 50μl drop of a 0.1mg/ml suspension of 20μm diameter silica microspheres (Kisker-biotech GbR) and sealed with adhesive tape. The device was mounted on an inverted optical tweezers microscope equipped with a piezoelectric stage. A NdVO4 laser provided the optical ...

Research paper thumbnail of Companding nonlinearities in optical signal processing

Proceedings of LEOS'94, 1994

ABSTRACT

Research paper thumbnail of Silk fibroin-based Active Optofluidics

The ancient silk fiber finds resurgence in a new paradigm of highly functional optofluidic device... more The ancient silk fiber finds resurgence in a new paradigm of highly functional optofluidic devices embodied by an active oxygenation sensor comprising a hemoglobin infused cast silk integrated diffraction grating for spectral analysis.

Research paper thumbnail of Optically trapped silica micro-fibers

ACOFT/AOS 2006 - Australian Conference on Optical Fibre Technology/Australian Optical Society, 2006

Page 1. 39 ISBN 0 –9775657– 0 –X ACOFT/AOS 2006 – Proceedings Melbourne, Australia, 10 – 13 July ... more Page 1. 39 ISBN 0 –9775657– 0 –X ACOFT/AOS 2006 – Proceedings Melbourne, Australia, 10 – 13 July 2006 Optically Trapped Silica Micro-fibers Peter Domachuk, Eric C. Magi, Mark Cronin-Golomb*, Benjamin J. Eggleton CUDOS, School of Physics, University of Sydney, Sydney, NSW, 2006, Australia *Dept. of Biomedical Engineering, Tufts University, Medford, MA, 02155, USA Abstract — We introduce a new type of optical MEMS through an optical micro-fiber waveguide controlled using optical trapping. ...

Research paper thumbnail of Investigation of Millimeter Wave Parametric Generation from a THz Photonic Band Gap Device

2006 IEEE Aerospace Conference, 2006

We present 1,2 a photonic band gap (PBG) structure design for terahertz (THz) wave parametric gen... more We present 1,2 a photonic band gap (PBG) structure design for terahertz (THz) wave parametric generation, which has crystal layer fabrication tolerance of a few micrometers and can be made with traditional polishing methods. This PBG structure consists of two component materials with a small refractive index difference at near infrared pump wavelengths and a large refractive index difference for THz waves. With this design the PBG device has optical properties very close to that of a bulk crystal in the near infrared, but photonic crystal features in the THz range, such as structural dispersion, which allows placement of the phase matched pump wavelength in the near infrared to eliminate two-photon absorption of the pump and signal beams. The added design flexibility also allows the use of the most efficient crystal orientations. Potential applications of this THz PBG structure are discussed.

Research paper thumbnail of Wave propagation in photorefractive media

Topics in Applied Physics, 1989

Research paper thumbnail of High-resolution nanomechanical analysis of suspended electrospun silk fibers with the torsional harmonic atomic force microscope

Beilstein journal of nanotechnology, 2013

Atomic force microscopes have become indispensable tools for mechanical characterization of nanos... more Atomic force microscopes have become indispensable tools for mechanical characterization of nanoscale and submicron structures. However, materials with complex geometries, such as electrospun fiber networks used for tissue scaffolds, still pose challenges due to the influence of tension and bending modulus on the response of the suspended structures. Here we report mechanical measurements on electrospun silk fibers with various treatments that allow discriminating among the different mechanisms that determine the mechanical behavior of these complex structures. In particular we were able to identify the role of tension and boundary conditions (pinned versus clamped) in determining the mechanical response of electrospun silk fibers. Our findings show that high-resolution mechanical imaging with torsional harmonic atomic force microscopy provides a reliable method to investigate the mechanics of materials with complex geometries.

Research paper thumbnail of Use of Optical Tweezers to Fabricate Tunable Filters in Photonic Crystal Fibers

2007 Conference on Lasers and Electro-Optics (CLEO), 2007

Tunable optical filters are fabricated in hollow core photonic crystal fibers by using optical tw... more Tunable optical filters are fabricated in hollow core photonic crystal fibers by using optical tweezer beams directed transversely to the fiber to load and space silica microspheres in the fluid filled hollow core.

Research paper thumbnail of Optical Limiters Based on the Photorefractive Effect

Abstract : During the course of this research, the working environment at ORTEL made it possible ... more Abstract : During the course of this research, the working environment at ORTEL made it possible for another important line of research to develop: photorefractive self pumped phase conjugation of the near infrared radiation of GaA1As lasers near 850nm. The results of that research are included in this report. Real time holography with the photorefractive effect results in the coupling of the two writing beams together through the hologram such that one beam - image or reference - is amplified at the expense of the other. This amplification/deamplification effect may be used to build optical oscillators, many of which are self-pumped phase conjugate mirrors. The primary aim of this study was to attempt to optimize these effects with a view towards applying the deamplification effect in optical limiting.

Research paper thumbnail of Linear Stability Analysis of Photorefractive Four-Wave Mixing with Pumpdepletion