A coupled quantum dot intersubband optical amplifier structure is reported. InGaAsP/GaAs supperlattice is used to effectively generate population inversion between the excited states and the ground state of the QD. Due to the three-dimensional quantum confinement, normal incidence optical amplification with low threshold current density can be expected. Such an intersubband optical amplifier is promising for highly-sensitive middle infrared (MWIR) and longwave infrared sensing and imaging.
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Chonbuk Natl Univ, Coll Engn, Div Adv Mat Engn, Res Ctr Adv Mat Dev, Jeonju 561756, South KoreaChonbuk Natl Univ, Coll Engn, Div Adv Mat Engn, Res Ctr Adv Mat Dev, Jeonju 561756, South Korea
Kim, Jin Soo
Lee, Cheul-Ro
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Chonbuk Natl Univ, Coll Engn, Div Adv Mat Engn, Res Ctr Adv Mat Dev, Jeonju 561756, South KoreaChonbuk Natl Univ, Coll Engn, Div Adv Mat Engn, Res Ctr Adv Mat Dev, Jeonju 561756, South Korea
Lee, Cheul-Ro
Oh, Dae Kon
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Elect & Telecommun Res Inst, IT Convergence & Components Lab, Taejon 305700, South KoreaChonbuk Natl Univ, Coll Engn, Div Adv Mat Engn, Res Ctr Adv Mat Dev, Jeonju 561756, South Korea
Oh, Dae Kon
Choi, Byung Seok
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Elect & Telecommun Res Inst, IT Convergence & Components Lab, Taejon 305700, South KoreaChonbuk Natl Univ, Coll Engn, Div Adv Mat Engn, Res Ctr Adv Mat Dev, Jeonju 561756, South Korea
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School of Physics and Astronomy, University of St. Andrews, Fife-KY16 9SS, United KingdomSchool of Physics and Astronomy, University of St. Andrews, Fife-KY16 9SS, United Kingdom
Malins, D.B.
Gomez-Iglesias, A.
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School of Physics and Astronomy, University of St. Andrews, Fife-KY16 9SS, United KingdomSchool of Physics and Astronomy, University of St. Andrews, Fife-KY16 9SS, United Kingdom
Gomez-Iglesias, A.
Rafailov, E.U.
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Carnegie Laboratory of Physics, Division of Electronic Engineering and Physics, University of Dundee, Nethergate, Dundee DD1 4HN, United KingdomSchool of Physics and Astronomy, University of St. Andrews, Fife-KY16 9SS, United Kingdom
Rafailov, E.U.
Sibbett, W.
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School of Physics and Astronomy, University of St. Andrews, Fife-KY16 9SS, United KingdomSchool of Physics and Astronomy, University of St. Andrews, Fife-KY16 9SS, United Kingdom
Sibbett, W.
Miller, A.
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School of Physics and Astronomy, University of St. Andrews, Fife-KY16 9SS, United KingdomSchool of Physics and Astronomy, University of St. Andrews, Fife-KY16 9SS, United Kingdom