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Title: Two-photon absorption induced by electric field gradient of optical near-field and its application to photolithography

Abstract

An electric field gradient is an inherent property of the optical near-field (ONF). We investigated its effect on electron excitation in a quantum dot via model calculations combining a density matrix formalism and a classical Lorentz model. The electric field gradient of the ONF was found to cause two-photon absorption by an unusual mechanism. Furthermore, the absorption exhibits a nonmonotonic dependence on the spatial arrangement of the nanosystem, completely different from that of conventional two-photon absorption induced by an intense electric field. The present two-photon absorption process was verified in a previous experimental observation by reinterpreting the results of ONF photolithography.

Authors:
; ;  [1];  [2]
  1. Department of Electrical Engineering and Information Systems, Graduate School of Engineering, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-8656 (Japan)
  2. Department of Theoretical and Computational Molecular Science, Institute for Molecular Science, Myodaiji, Okazaki 444-8585 (Japan)
Publication Date:
OSTI Identifier:
22399031
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 106; Journal Issue: 19; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; ABSORPTION; DENSITY MATRIX; ELECTRIC FIELDS; ELECTRONS; EXCITATION; PHOTONS; QUANTUM DOTS

Citation Formats

Yamaguchi, Maiku, Kawazoe, Tadashi, Yatsui, Takashi, and Nobusada, Katsuyuki, E-mail: nobusada@ims.ac.jp. Two-photon absorption induced by electric field gradient of optical near-field and its application to photolithography. United States: N. p., 2015. Web. doi:10.1063/1.4921005.
Yamaguchi, Maiku, Kawazoe, Tadashi, Yatsui, Takashi, & Nobusada, Katsuyuki, E-mail: nobusada@ims.ac.jp. Two-photon absorption induced by electric field gradient of optical near-field and its application to photolithography. United States. doi:10.1063/1.4921005.
Yamaguchi, Maiku, Kawazoe, Tadashi, Yatsui, Takashi, and Nobusada, Katsuyuki, E-mail: nobusada@ims.ac.jp. Mon . "Two-photon absorption induced by electric field gradient of optical near-field and its application to photolithography". United States. doi:10.1063/1.4921005.
@article{osti_22399031,
title = {Two-photon absorption induced by electric field gradient of optical near-field and its application to photolithography},
author = {Yamaguchi, Maiku and Kawazoe, Tadashi and Yatsui, Takashi and Nobusada, Katsuyuki, E-mail: nobusada@ims.ac.jp},
abstractNote = {An electric field gradient is an inherent property of the optical near-field (ONF). We investigated its effect on electron excitation in a quantum dot via model calculations combining a density matrix formalism and a classical Lorentz model. The electric field gradient of the ONF was found to cause two-photon absorption by an unusual mechanism. Furthermore, the absorption exhibits a nonmonotonic dependence on the spatial arrangement of the nanosystem, completely different from that of conventional two-photon absorption induced by an intense electric field. The present two-photon absorption process was verified in a previous experimental observation by reinterpreting the results of ONF photolithography.},
doi = {10.1063/1.4921005},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 19,
volume = 106,
place = {United States},
year = {2015},
month = {5}
}