徳島大学 教育・研究者情報データベース(EDB)

1. 徳島大学.大学院社会産業理工学研究部.フロンティア研究センター.光ナノテクノロジー研究部門.ナノマテリアルテクノロジー分野(日亜寄附講座)(〜2018年3月31日)

1. 盧 翔孟

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2. (英) Ota Hiroto

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3. 熊谷 直人

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4. 北田 貴弘(->個人[塚越 貴弘])

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5. 井須 俊郎

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(英) GaAs/AlAs triple-coupled cavity with InAs quantum dots for ultrafast wavelength conversion devices

(英) We have investigated a GaAs/AlAs triple-coupled multilayer cavity structure with InAs quantum dots for an ultrafast wavelength conversion device. Three cavity modes with the resonance frequencies ω₁, ω₂, and ω₃ were used for efficient wavelength conversion via a four-wave mixing (FWM) process. Identical frequency separation between two adjacent modes (ω₁- ω₂ = ω₂- ω₃) was successfully realized using a controlled lateral thickness variation across the wafer. Time-resolved FWM signals from the triple-coupled multilayer cavity were measured using 100 fs laser pulses. The incident laser pulses were divided into two pulses and each of them was spectrally shaped individually so that the input and control pulses only covered the ω₁ and ω₂ modes, respectively. The wavelength-converted FWM signal with a frequency of ω₃ (= 2ω₂- ω₁) was clearly observed when the sample was simultaneously irradiated with the input and control laser pulses.