Abstract
This study investigates a new process for fabricating a diffraction grating in a flexible polydimethylsiloxane (PDMS) sheet by using a high-intensity femtosecond-pulsed laser (FS-laser). Unlike soft-lithography with the bonding technique, FS-laser direct writing provides a unique micromachining method for fabricating an embedded diffraction grating (inside a PDMS substrate) with laser pulses of visible light. This approach is a nonlinear mask-less process for rapid prototyping. The wavelength of the FS-laser beam is frequency-doubled to 517 nm. The repetition rate and pulse width of the FS-laser system are 100 kHz and 350 fs, respectively. An embedded PDMS diffraction grating is successfully demonstrated based on a calculated optical phase shift structure. Crown
Original language | English |
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Pages (from-to) | 1344-1347 |
Number of pages | 4 |
Journal | Microelectronic Engineering |
Volume | 87 |
Issue number | 5-8 |
DOIs | |
Publication status | Published - 2010 May |
Externally published | Yes |
Keywords
- Diffraction grating
- Femtosecond laser
- Micromachining
- PDMS
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Electrical and Electronic Engineering