Vijayakumar, A <br/><br/>
Design, fabrication, and evaluation of a multilevel spiral-phase Fresnel zone plate for optical trapping.  [electronic resource] 

 -  Applied optics  Sep 2012 
 - 6038-44 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1539-4522 
<br/><br/><label>Standard No.: </label>10.1364/AO.51.006038  doi