title: Plasmon enhanced photoacoustic generation from volumetric electromagnetic hotspots.
abstract: This work reports plasmon enhanced photoacoustic generation by using a three dimensional plasmonic absorber. The 3D plasmonic absorber comprises a thin polymer film on glass nanopillar arrays with nanogap-rich silver nanoislands. The 3D plasmonic absorber clearly shows 24.6 times higher enhancement of photoacoustic signals at an excitation wavelength of 630 nm than a simple polymeric absorber. The photoacoustic enhancement results from the volumetric electromagnetic field enhancement on a light-absorbing polymer through 3D plasmonic nanostructures. This novel photoacoustic absorber provides a new direction for highly efficient ultrasonic generation.
authors.affiliation: Department of Bio and Brain Engineering, KAIST Institute for Optical Science and Technology, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Republic of Korea. kjeong@kaist.ac.kr.
authors.forename: Sang-Gil
authors.initials: SG
authors.lastname: Park
authors.affiliation: Department of Bio and Brain Engineering, KAIST Institute for Optical Science and Technology, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Republic of Korea. kjeong@kaist.ac.kr.
authors.forename: Seung-Bum
authors.initials: SB
authors.lastname: Yang
authors.affiliation: Department of Bio and Brain Engineering, KAIST Institute for Optical Science and Technology, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Republic of Korea. kjeong@kaist.ac.kr.
authors.forename: Myeong-Su
authors.initials: MS
authors.lastname: Ahn
authors.affiliation: Department of Bio and Brain Engineering, KAIST Institute for Optical Science and Technology, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Republic of Korea. kjeong@kaist.ac.kr and DMC R&D Center, Samsung Electronics Co., Ltd., Suwon 443-742, Republic of Korea.
authors.forename: Young-Jae
authors.initials: YJ
authors.lastname: Oh
authors.affiliation: Center for Medical Metrology, Korea Research Institute of Standards and Science, 267 Gajeong-ro, Yuseong-gu, Daejeon 305-340, Republic of Korea.
authors.forename: Yong Tae
authors.initials: YT
authors.lastname: Kim
authors.affiliation: Department of Bio and Brain Engineering, KAIST Institute for Optical Science and Technology, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Republic of Korea. kjeong@kaist.ac.kr.
authors.forename: Ki-Hun
authors.initials: KH
authors.lastname: Jeong