Terahertz pinch harmonics enabled by single nano rods

Hyeong Ryeol Park, Young Mi Bahk, Jong Ho Choe, Sanghoon Han, Seong Soo Choi, Kwang Jun Ahn, Namkyoo Park, Q. Han Park, Dai Sik Kim

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)24775-24781
Number of pages7
JournalOptics Express
Issue number24
StatePublished - Nov 21 2011


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