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Related Experiment Video

Updated: Jan 9, 2026

Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System

Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System

Published on: June 30, 2018

Dynamically adjustable annular laser trapping based on axicons.

Bing Shao¹, Sadik C Esener, Jaclyn M Nascimento

¹Department of Electrical and Computer Engineering, University of California, San Diego, La Jolla 92093-0408, USA. bshao@soliton.ucsd.edu

|August 17, 2006

Summary

This summary is machine-generated.

Researchers developed a novel laser trap to study sperm movement and egg attraction. This tool offers a new way to objectively measure animal fertility and biological responses.

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Related Experiment Videos

Last Updated: Jan 9, 2026

Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System

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Published on: June 30, 2018

Measurement of Tension Release During Laser Induced Axon Lesion to Evaluate Axonal Adhesion to the Substrate at Piconewton and Millisecond Resolution

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Construction of a High Resolution Microscope with Conventional and Holographic Optical Trapping Capabilities

Construction of a High Resolution Microscope with Conventional and Holographic Optical Trapping Capabilities

Published on: April 22, 2013

Area of Science:

Biophysics
Reproductive Biology
Optical Engineering

Background:

Sperm chemotaxis and motility are crucial for fertilization.
Existing methods for studying sperm behavior can be limited in objectivity and scalability.
Precise manipulation of sperm is needed for detailed analysis.

Purpose of the Study:

To design, simulate, and implement an annular laser trap for studying sperm chemotaxis and motility.
To create a dynamic and adjustable trapping system for sperm analysis.
To establish a quantitative tool for assessing animal fertility.

Main Methods:

Utilized axicon-based annular laser trapping.
Employed ray-tracing simulation for system design.
Implemented dynamic adjustment of the trapping ring diameter (over 400 microm).
Conducted trapping experiments with microspheres and dog sperm.

Main Results:

Successfully designed and implemented a functional annular laser trap.
Demonstrated the dynamic adjustability of the trapping ring diameter.
Validated the system's feasibility through experiments with microspheres and dog sperm.
Confirmed that power requirements align with theoretical predictions.

Conclusions:

The developed annular laser trap is a feasible and effective tool for sperm analysis.
This technology provides a prototype for a parallel, objective, and quantitative method for studying animal fertility.
The system has potential applications in biotropism research and reproductive science.