Magnetic response of random lasing modes in a ZnO nanoparticle film deposited on a NiFe thin film

Hideki Fujiwara; Hideo Kaiju; Junji Nishii; Keiji Sasaki

doi:10.1063/1.5040720

Magnetic response of random lasing modes in a ZnO nanoparticle film deposited on a NiFe thin film

Hideki Fujiwara, Hideo Kaiju, Junji Nishii, Keiji Sasaki

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

This study experimentally demonstrates lasing mode switching within a ZnO nanoparticle film coated onto a magnetic thin film of NiFe alloy. When a neodymium magnet is brought close to or moved away from the film, switching behavior is observed in the lasing modes, although such change is not induced in a ZnO nanoparticle film on a glass substrate. Our results suggest that the observed changes in lasing modes are because of a magneto-optical effect at the surface of the NiFe thin film. The magneto-optical effect would be enhanced by localized fields near the surface, inducing suppression or enhancement of the lasing modes in response to the surrounding environments, and accounting for the lasing mode switching.

Original language	English
Article number	131108
Journal	Applied Physics Letters
Volume	113
Issue number	13
DOIs	https://doi.org/10.1063/1.5040720
Publication status	Published - 2018 Sept 24
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Magnetic response of random lasing modes in a ZnO nanoparticle film deposited on a NiFe thin film",

abstract = "This study experimentally demonstrates lasing mode switching within a ZnO nanoparticle film coated onto a magnetic thin film of NiFe alloy. When a neodymium magnet is brought close to or moved away from the film, switching behavior is observed in the lasing modes, although such change is not induced in a ZnO nanoparticle film on a glass substrate. Our results suggest that the observed changes in lasing modes are because of a magneto-optical effect at the surface of the NiFe thin film. The magneto-optical effect would be enhanced by localized fields near the surface, inducing suppression or enhancement of the lasing modes in response to the surrounding environments, and accounting for the lasing mode switching.",

author = "Hideki Fujiwara and Hideo Kaiju and Junji Nishii and Keiji Sasaki",

note = "Funding Information: This work was supported by JSPS KAKENHI (Grant Nos. 17K05016, 17K19019, and 16H06506), Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials, the Amada Foundation, and Nippon Sheet Glass Foundation for Materials Science and Engineering. Publisher Copyright: {\textcopyright} 2018 Author(s).",

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AU - Fujiwara, Hideki

AU - Kaiju, Hideo

AU - Nishii, Junji

AU - Sasaki, Keiji

N1 - Funding Information: This work was supported by JSPS KAKENHI (Grant Nos. 17K05016, 17K19019, and 16H06506), Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials, the Amada Foundation, and Nippon Sheet Glass Foundation for Materials Science and Engineering. Publisher Copyright: © 2018 Author(s).

PY - 2018/9/24

Y1 - 2018/9/24

N2 - This study experimentally demonstrates lasing mode switching within a ZnO nanoparticle film coated onto a magnetic thin film of NiFe alloy. When a neodymium magnet is brought close to or moved away from the film, switching behavior is observed in the lasing modes, although such change is not induced in a ZnO nanoparticle film on a glass substrate. Our results suggest that the observed changes in lasing modes are because of a magneto-optical effect at the surface of the NiFe thin film. The magneto-optical effect would be enhanced by localized fields near the surface, inducing suppression or enhancement of the lasing modes in response to the surrounding environments, and accounting for the lasing mode switching.

AB - This study experimentally demonstrates lasing mode switching within a ZnO nanoparticle film coated onto a magnetic thin film of NiFe alloy. When a neodymium magnet is brought close to or moved away from the film, switching behavior is observed in the lasing modes, although such change is not induced in a ZnO nanoparticle film on a glass substrate. Our results suggest that the observed changes in lasing modes are because of a magneto-optical effect at the surface of the NiFe thin film. The magneto-optical effect would be enhanced by localized fields near the surface, inducing suppression or enhancement of the lasing modes in response to the surrounding environments, and accounting for the lasing mode switching.

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Magnetic response of random lasing modes in a ZnO nanoparticle film deposited on a NiFe thin film

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