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Particle size limits when using optical trapping and deflection of particles for sorting using diode laser bars
Robert W Applegate1, David W M Marr, Jeff Squier
1Center for Biomedical Engineering, The University of New Mexico, 222 University Blvd NE Centennial Engineering Center Room 2041, Albuquerque, NM 87131, USA. rappleg8@unm.edu
Optics Express
|September 23, 2009
Summary
Diode laser bar optical trapping offers a simple, cost-effective method for manipulating large particles over 100 micrometers. This technique overcomes limitations of traditional point laser traps in fluidic environments for various applications.
Area of Science:
- Biophysics
- Optical trapping
- Microfluidics
Background:
- Conventional point laser traps struggle with manipulating large particles (>100 micrometers).
- Limitations exist in directing larger particles effectively using standard optical trapping methods.
Purpose of the Study:
- To explore a simple and inexpensive diode laser bar optical trapping method for large particle manipulation.
- To adapt and verify a line optical trap model for larger particle regimes.
- To examine the advantages and limitations of this technique for particles >100 micrometers.
Main Methods:
- Utilizing diode laser bar optical trapping.
- Expanding a previously developed line optical trap model.
- Investigating particle manipulation in fluidic environments.
Main Results:
- Demonstrated a viable method for manipulating particles larger than 100 micrometers.
- Verified the effectiveness of diode laser bar trapping for large particles.
- Identified specific advantages and limitations of the technique.
Conclusions:
- Diode laser bar optical trapping is a promising technique for large particle manipulation.
- This method offers a cost-effective solution for biochemical, biological, and biomedical applications.
- The expanded line optical trap model provides a framework for understanding large particle trapping.
