A simple model of multiphoton micromachining in silk hydrogels
Abstract
High resolution three-dimensional voids can be directly written into transparent silk fibroin hydrogels using ultrashort pulses of near-infrared (NIR) light. Here, we propose a simple finite-element model that can be used to predict the size and shape of individual features under various exposure conditions. We compare predicted and measured feature volumes for a wide range of parameters and use the model to determine optimum conditions for maximum material removal. The simplicity of the model implies that the mechanism of multiphoton induced void creation in silk is due to direct absorption of light energy rather than diffusion of heat or other photoproducts, and confirms that multiphoton absorption of NIR light in silk is purely a 3-photon process.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 13, 2016
- Source ID
- 10.1063/1.4953826
Entities
People
- Carlo Alonzo
- David L. Kaplan
- Fiorenzo G Omenetto
- Irene Georgakoudi
- Matthew B. Applegate
Organizations
- Office of Naval Research
- Tufts University