Rhie, Jiyeah Lee, Dukhyung Kim, Taehoon Kim, Seonghun Seo, Minah Kim, Dai-Sik Bahk, Young-Mi 2024-05-30T09:30:23Z 2024-05-30T09:30:23Z 2024-05-30 2024-06 1530-6984 https://pubs.kist.re.kr/handle/201004/149962 Recently, extensive research has been reported on the detection of metal nanoparticles using terahertz waves, due to their potential for efficient and nondestructive detection of chemical and biological samples without labeling. Resonant terahertz nanoantennas can be used to detect a small amount of molecules whose vibrational modes are in the terahertz frequency range with high sensitivity. However, the positioning of target molecules is critical to obtaining a reasonable signal because the field distribution is inhomogeneous over the antenna structure. Here, we combine an optical tweezing technique and terahertz spectroscopy based on nanoplasmonics, resulting in extensive controllable tweezing and sensitive detection at the same time. We observed optical tweezing of a gold nanoparticle and detected it with terahertz waves by using a single bowtie nanoantenna. Furthermore, the calculations confirm that molecular fingerprinting is possible by using our technique. This study will be a prestep of biomolecular detection using gold nanoparticles in terahertz spectroscopy. English American Chemical Society Optical Tweezing Terahertz Probing for a Single Metal Nanoparticle Article 10.1021/acs.nanolett.4c01439 1 Nano Letters, v.24, no.22, pp.6753 - 6760 Nano Letters 24 22 6753 6760 N scie scopus 001225075300001 2-s2.0-85193297012 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article GOLD NANOPARTICLES SPECTROSCOPY Terahertz spectroscopy single particle detection optical trapping bowtie antenna molecularfingerprinting