Enhanced Directivity From Subwavelength Infrared/Optical Nano-Antennas Loaded With Plasmonic Materials or Metamaterials Export

@article{citeulike:3790234, abstract = {Here, we explore theoretically the concept of enhanced directivity from electrically small subwavelength radiators containing negative-parameter materials, such as plasmonic materials with negative permittivity at THz, infrared and optical frequencies. In particular, we study higher order plasmonic resonances of a subwavelength core-shell spherical nano-antenna, and we analyze the near-zone field distributions and far-field radiation patterns of such a structure when it is excited by a small dipole source, demonstrating analytically and numerically the possibility of having highly directive patterns from a nano-structure with electrically small dimensions. Radiation characteristics and intrinsic limitations on performance are analyzed in detail, and a potential application of this novel technique for super-resolution detection of the displacement of a nano-object is also pointed out.}, author = {Alu, A. and Engheta, N.}, booktitle = {Antennas and Propagation, IEEE Transactions on}, citeulike-article-id = {3790234}, citeulike-linkout-0 = {http://dx.doi.org/10.1109/TAP.2007.908368}, citeulike-linkout-1 = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4380520}, doi = {10.1109/TAP.2007.908368}, journal = {Antennas and Propagation, IEEE Transactions on}, keywords = {nanoantenna}, number = {11}, pages = {3027--3039}, posted-at = {2008-12-15 20:41:08}, priority = {2}, title = {Enhanced Directivity From Subwavelength Infrared/Optical Nano-Antennas Loaded With Plasmonic Materials or Metamaterials}, url = {http://dx.doi.org/10.1109/TAP.2007.908368}, volume = {55}, year = {2007} }

TY - JOUR ID - citeulike:3790234 L3 - citeulike-article-id:3790234 N2 - Here, we explore theoretically the concept of enhanced directivity from electrically small subwavelength radiators containing negative-parameter materials, such as plasmonic materials with negative permittivity at THz, infrared and optical frequencies. In particular, we study higher order plasmonic resonances of a subwavelength core-shell spherical nano-antenna, and we analyze the near-zone field distributions and far-field radiation patterns of such a structure when it is excited by a small dipole source, demonstrating analytically and numerically the possibility of having highly directive patterns from a nano-structure with electrically small dimensions. Radiation characteristics and intrinsic limitations on performance are analyzed in detail, and a potential application of this novel technique for super-resolution detection of the displacement of a nano-object is also pointed out. IS - 11 JF - Antennas and Propagation, IEEE Transactions on EP - 3039 TI - Enhanced Directivity From Subwavelength Infrared/Optical Nano-Antennas Loaded With Plasmonic Materials or Metamaterials VL - 55 T2 - Antennas and Propagation, IEEE Transactions on SP - 3027 KW - nanoantenna AU - Alu, A AU - Engheta, N PY - 2007/// UR - http://dx.doi.org/10.1109/TAP.2007.908368 ER -