Producing Ultrastiff Graphene with Direct Laser Writing
Graphene has exceptionally high in-plane strength but exceptionally low out-of-plane stiffness, making it flimsy and hard to handle. Here, researchers show that using a laser writing technique called optical forging increases graphene bending stiffness up to five orders of magnitude, opening venues for a plethora of new applications, such as GHz resonators and 3D scaffolds.
Direct laser writing (optical forging) of the patterns was performed with a 515-nm femtosecond laser (PHAROS-10 from Light Conversion, 600 kHz repetition rate, 250 fs pulse duration) focused with an objective lens (N.A. = 0.8) to a single Gaussian spot (FWHM ~ 500 nm).
Watch the video (on LinkedIn) demonstrating the optical forging process.
The PHAROS series of modular-design industrial-grade femtosecond lasers feature:
- 190 fs – 20 ps tunable pulse duration
- 2 mJ maximum pulse energy
- 20 W maximum output power
- Single-shot – 1 MHz repetition rate
- Pulse picker for pulse-on-demand mode
- Industrial-grade design
- Optional automated harmonic generator
- Optional CEP stabilization
- Optional repetition rate locking to an external source
To request more information or a quotation for this or other Light Conversion products, contact IL Photonics.