'A'
Modulation of focus using photonic crystal waveguide
Author(s): Chen HB (Chen, Hongbo), Zeng Y (Zeng, Yong), Chen XS (Chen, Xiaoshuang), Wang J (Wang, Jian), Lu W (Lu, Wei)  
Source: PHYSICS LETTERS A    Volume: 372    Issue: 30    Pages: 5096-5100    Published: JUL 21 2008    
Authors' address:
Chinese Acad Sci, Shanghai Inst Tech Phys, Natl Lab Infrared Phys, Shanghai 200083, Peoples R China

'B'
Off-axis directional beaming of optical field diffracted by a single subwavelength metal slit with asymmetric dielectric surface gratings
Author(s): Kim S (Kim, Seyoon), Kim H (Kim, Hwi), Lim Y (Lim, Yongjun), Lee B (Lee, Byoungho)  
Source: APPLIED PHYSICS LETTERS    Volume: 90    Issue: 5  Article Number: 051113    Published: JAN 29 2007