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Papers by Ali Said

Research paper thumbnail of Waveguide electro-optic modulator in fused silica fabricated by femtosecond laser direct writing and thermal poling

Research paper thumbnail of Microsystems and Sensors

Topics in Applied Physics, 2011

ABSTRACT In this chapter, the use of femtosecond laser to fabricate glass-based microsystems and ... more ABSTRACT In this chapter, the use of femtosecond laser to fabricate glass-based microsystems and sensors is examined. Several advanced technology demonstrators are presented, including some very unusual fused silica MEMS. Present technological barriers are discussed.

Research paper thumbnail of Fabrication of high-aspect ratio, micro-fluidic channels and tunnels using femtosecond laser pulses and chemical etching

Optics express, Jan 17, 2004

We present novel results obtained in the fabrication of high-aspect ratio micro-fluidic microstru... more We present novel results obtained in the fabrication of high-aspect ratio micro-fluidic microstructures chemically etched from fused silica substrates locally exposed to femtosecond laser radiation. A volume sampling method to generate three-dimensional patterns is proposed and a systematic SEM-based analysis of the microstructure is presented. The results obtained gives new insights toward a better understanding of the femtosecond laser interaction with fused silica glass (a-SiO(2)).

Research paper thumbnail of Investigation of Femtosecond Laser Irradiation on Fused Silica Etching Selectivity

MRS Proceedings, 2004

Femtosecond laser irradiation has various noticeable effects on fused silica. It can locally incr... more Femtosecond laser irradiation has various noticeable effects on fused silica. It can locally increase the index of refraction and modify the material chemical selectivity. Regions that have been exposed to the laser are etched hundred fold faster than unexposed regions. These effects are of practical importance from an application point-of-view and open new opportunities for the development of integrated photonics

Research paper thumbnail of Integrating optics and micro-mechanics in a single substrate: a step toward monolithic integration in fused silica

Research paper thumbnail of Nanoindentation and birefringence measurements on fused silica specimen exposed to low-energy femtosecond pulses

Research paper thumbnail of Microfluidic sorting system based on optical waveguide integration and diode laser bar trapping

Research paper thumbnail of Waveguide electro-optic modulator in fused silica fabricated by femtosecond laser direct writing and thermal poling

Research paper thumbnail of Microsystems and Sensors

Topics in Applied Physics, 2011

ABSTRACT In this chapter, the use of femtosecond laser to fabricate glass-based microsystems and ... more ABSTRACT In this chapter, the use of femtosecond laser to fabricate glass-based microsystems and sensors is examined. Several advanced technology demonstrators are presented, including some very unusual fused silica MEMS. Present technological barriers are discussed.

Research paper thumbnail of Fabrication of high-aspect ratio, micro-fluidic channels and tunnels using femtosecond laser pulses and chemical etching

Optics express, Jan 17, 2004

We present novel results obtained in the fabrication of high-aspect ratio micro-fluidic microstru... more We present novel results obtained in the fabrication of high-aspect ratio micro-fluidic microstructures chemically etched from fused silica substrates locally exposed to femtosecond laser radiation. A volume sampling method to generate three-dimensional patterns is proposed and a systematic SEM-based analysis of the microstructure is presented. The results obtained gives new insights toward a better understanding of the femtosecond laser interaction with fused silica glass (a-SiO(2)).

Research paper thumbnail of Investigation of Femtosecond Laser Irradiation on Fused Silica Etching Selectivity

MRS Proceedings, 2004

Femtosecond laser irradiation has various noticeable effects on fused silica. It can locally incr... more Femtosecond laser irradiation has various noticeable effects on fused silica. It can locally increase the index of refraction and modify the material chemical selectivity. Regions that have been exposed to the laser are etched hundred fold faster than unexposed regions. These effects are of practical importance from an application point-of-view and open new opportunities for the development of integrated photonics

Research paper thumbnail of Integrating optics and micro-mechanics in a single substrate: a step toward monolithic integration in fused silica

Research paper thumbnail of Nanoindentation and birefringence measurements on fused silica specimen exposed to low-energy femtosecond pulses

Research paper thumbnail of Microfluidic sorting system based on optical waveguide integration and diode laser bar trapping

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