TY - GEN
T1 - Optical silver superlens imaging below the diffraction limit
AU - Lee, Hyesog
AU - Xiong, Yi
AU - Fang, Nicholas
AU - Srituravanich, Werayut
AU - Durant, Stephane
AU - Ambati, Muralidhar
AU - Sun, Cheng
AU - Zhang, Xiang
PY - 2006
Y1 - 2006
N2 - Conventional optical imaging systems cannot resolve the features smaller than approximately half the size of the working wavelength, called the diffraction limit. The superlens theory predicts that a flat lens made of an ideal material with negative permittivity and/or permeability is able to resolve features much smaller than working wavelength through the restoration of evanescent waves[l]. We experimentally demonstrated the superlens concept for the first time using a thin silver slab in a quasi-static regime; a 60nm half-pitch object was imaged with λ=365nm illumination wavelength, λ/6 resolution[3], and the imaging of 50nm half-pitch object under the same light source, λ/7, was also reported[4]. Here, we present mainly experimental studies of near-field optical superlens imaging.
AB - Conventional optical imaging systems cannot resolve the features smaller than approximately half the size of the working wavelength, called the diffraction limit. The superlens theory predicts that a flat lens made of an ideal material with negative permittivity and/or permeability is able to resolve features much smaller than working wavelength through the restoration of evanescent waves[l]. We experimentally demonstrated the superlens concept for the first time using a thin silver slab in a quasi-static regime; a 60nm half-pitch object was imaged with λ=365nm illumination wavelength, λ/6 resolution[3], and the imaging of 50nm half-pitch object under the same light source, λ/7, was also reported[4]. Here, we present mainly experimental studies of near-field optical superlens imaging.
UR - http://www.scopus.com/inward/record.url?scp=33947705109&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33947705109&partnerID=8YFLogxK
U2 - 10.1557/proc-0919-j04-01
DO - 10.1557/proc-0919-j04-01
M3 - Conference contribution
AN - SCOPUS:33947705109
SN - 1558998764
SN - 9781558998766
T3 - Materials Research Society Symposium Proceedings
SP - 61
EP - 67
BT - Negative Index Materials
PB - Materials Research Society
T2 - 2006 MRS Spring Meeting
Y2 - 17 April 2006 through 21 April 2006
ER -