title: Terahertz pinch harmonics enabled by single nano rods.
abstract: A pinch harmonic (or guitar harmonic) is a musical note produced by lightly pressing the thumb of the picking hand upon the string immediately after it is picked [J. Chem. Educ. 84, 1287 (2007)]. This technique turns off the fundamental and all overtones except those with a node at that location. Here we present a terahertz analogue of pinch harmonics, whereby a metallic nano rod placed at a harmonic node on a terahertz nanoresonator suppresses the fundamental mode, making the higher harmonics dominant. Strikingly, a skin depth-wide nano rod placed at the mid-point turns off all resonances. Our work demonstrates that terahertz electromagnetic waves can be tailored by nanoparticles strategically positioned, paving important path towards terahertz switching and detection applications.
authors: Department of Physics and Astronomy and Center for Subwavelength Optics, Seoul National University, Seoul, 151-747, Korea.
authors: Hyeong-Ryeol
authors: HR
authors: Park
authors: Young-Mi
authors: YM
authors: Bahk
authors: Jong Ho
authors: JH
authors: Choe
authors: Sanghoon
authors: S
authors: Han
authors: Seong Soo
authors: SS
authors: Choi
authors: Kwang Jun
authors: KJ
authors: Ahn
authors: Namkyoo
authors: N
authors: Park
authors: Q-Han
authors: QH
authors: Park
authors: Dai-Sik
authors: DS
authors: Kim
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000295:instrumentation*; D009991:Oscillometry / Q000295:instrumentation*; D055053:Terahertz Radiation; D014159:Transducers