Combined holographic-mechanical optical tweezers: Construction, optimization, and calibration

Journal Article · Sat Aug 15 00:00:00 EDT 2009 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.3196181· OSTI ID:22051022

Hanes, Richard D. L.; Jenkins, Matthew C; Egelhaaf, Stefan U ^[1]

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1. Condensed Matter Physics Laboratory, Heinrich-Heine University, 40225 Duesseldorf (Germany)

A spatial light modulator (SLM) and a pair of galvanometer-mounted mirrors (GMM) were combined into an optical tweezers setup. This provides great flexibility as the SLM creates an array of traps, which can be moved smoothly and quickly with the GMM. To optimize performance, the effect of the incidence angle on the SLM with respect to phase and intensity response was investigated. Although it is common to use the SLM at an incidence angle of 45 deg., smaller angles give a full 2{pi} phase shift and an output intensity which is less dependent on the magnitude of the phase shift. The traps were calibrated using an active oscillatory technique and a passive probability distribution method.

• OSTI ID: 22051022
• Journal Information: Review of Scientific Instruments, Vol. 80, Issue 8; Other Information: (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CALIBRATION
FLEXIBILITY
GALVANOMETERS
HOLOGRAPHY
INCIDENCE ANGLE
MIRRORS
MODULATION
OPTIMIZATION
PERFORMANCE
PHASE SHIFT
PROBABILITY
VISIBLE RADIATION