Enhancement of acousto-optic interaction by using phoxonic crystal with structural hierarchy = 계층구조가 삽입된 Phoxonic Crystal을 이용한 음향-광학 상호작용 증대

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In this study, we propose phoxonic crystals with structural hierarchy to enhance the acousto-optic interaction. In previous studies, researchers investigated the interaction between light and sound which have same wavelength scales, so infrared interacts with high-frequency acoustic wave in GHz range. However, the light cannot interact strongly with the sound due to high acoustic attenuation coefficient which is proportional to the square of frequency. By using acoustic wave with low frequency, the acousto-optic interaction can be enhanced, but the wavelength of sound is far different from that of the infrared. Therefore, it is necessary to investigate the phoxonic crystals which can control waves with different wavelength. In this study, we propose the phoxonic crystals with structural hierarchy and a cavity. The proposed phoxonic crystals confine more optic waves at the cavity than conventional phoxonic crystals, so the acousto-optic interaction is enhanced by about 2.8 times. In order to confine more acoustic waves, we propose three-phase phoxonic crystals with structural hierarchy by using mathematical homogenization theory. The structures further enhance the confinement of sound and the acousto-optic interaction.
Advisors
Jeon, Wonjuresearcher전원주researcher
Description
한국과학기술원 :기계공학과,
Publisher
한국과학기술원
Issue Date
2019
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 기계공학과, 2019.2,[iii, 29 p. :]

Keywords

phoxonic crystal▼astructural hierarchy▼aacouto-optic interaction▼ahomogenization; 포소닉 크리스탈▼a계층구조▼a음향-광학 상호작용▼a균질화

URI
http://hdl.handle.net/10203/265945
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=843042&flag=dissertation
Appears in Collection
ME-Theses_Master(석사논문)
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