Del Mar Photonics

Ultrafast laser-induced crystallization of amorphous silicon films
Tae Y. Choi
Swiss Federal Institute of Technology Zurich
Institute of Energy Technology
CH-8092, Switzerland
David J. Hwang
Costas P. Grigoropoulos
University of California
Department of Mechanical Engineering
Berkeley, California 94720-1740

Abstract. Ultrashort pulsed laser irradiation is used to crystallize 100-nm amorphous-silicon (a-Si) films. The crystallization process is observed by time-resolved pump-and-probe reflection imaging in the range of 0.2 ps to 100 ns. The in-situ images, in conjunction with postprocessed scanning electron microscopy (SEM) and atomic force microscopy
(AFM) mapping of the crystallized structure, provide evidence for nonthermal ultra-fast phase transition and subsequent surface-initiated crystallization.

Subject terms: ultrashort; amorphous silicon; pump and probe; ultrafast phase transition; crystallization.

Related Del Mar Photonics products

Femtosecond Lasers

Ti:Sapphire lasers
Trestles femtosecond Ti:Sapphire laser
Trestles Finesse femtosecond Ti:Sapphire laser with integrated DPSS pump laser
Teahupoo Rider femtosecond amplified Ti:Sapphire laser

Cr:Forsterite lasers
Mavericks femtosecond Cr:Forsterite laser

Er-based lasers
Tamarack femtosecond fiber laser (Er-doped fiber)
Buccaneer femtosecond OA fiber laser (Er-doped fiber) and SHG
Cannon Ultra-broadband light source

Yb-based lasers
Tourmaline femtosecond Yt-doped fiber laser
Tourmaline Yb-SS400 Ytterbium-doped Femtosecond Solid-State Laser
Tourmaline Yb-ULRepRate-07 Yb-based high-energy fiber laser system kit

Cr:ZnSe lasers
Chata femtosecond Cr:ZnSe laser (2.5 micron) coming soon

Femtosecond pulse measurement instrumentation

Reef scanning and single shot femtosecond autocorrelators
Avoca SPIDER - Spectral phase interferometry for direct electric-field reconstruction (SPIDER)
Rincon third order femtosecond cross-correlator (third order autocorrelator TOAC) also referred to as contrast meter

Ultrafast Dynamics Research Tools

Beacon femtosecond fluorescence up-conversion (optical gating) spectrometer
Hatteras Ultrafast Transient Absorption Spectrometer

Femtosecond Systems and Accessories

Femtosecond Micromachining
Femtosecond nanophotonics
Femtosecond NSOM
Near-field Scanning Optical Microscope (NSOM)
Pacifica femtosecond fiber laser based terahertz spectrometer
Pismo pulse picker (ultrafast electro-optical shutter)
Wavelength conversion: second and third harmonics generators for femtosecond lasers - THG for amplified TiSa - RegA 9000
Jibe white light continuum generator
Kirra Optical Faraday Rotators and Isolators

Instruments for Nanotechnologies

Near-field Scanning Optical Microscope (NSOM)
Femtosecond nanophotonics
Femtosecond NSOM

more products