Occupation Modulation of Higher Subbands in a Three-Barrier Tunneling Structure with a Magnetic Field
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Abstract
We verify that the magnetic suppression of intersubband LO or LA phonon scattering can give rise to a noticeable nonthermal occupation in higher-lying subbands. This is clearly determined by the relative intensity ratio of the interband photoluminescence spectra for the E2-HH1 and E1-HH1 transitions. The observed phenomenon may provide an effective method to control the intersubband scattering rate, which is a key factor of the so-called quantum cascade lasers. This is helpful for the population inversion between both the subbands in quantum wells.
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AN Long, TANG Yan, ZHENG Hou-Zhi, ZHANG Ji-Dong, TAN Ping-Heng, YANG Fu-Hua, JI Yang, CHEN Yuan-Zhen. Occupation Modulation of Higher Subbands in a Three-Barrier Tunneling Structure with a Magnetic Field[J]. Chin. Phys. Lett., 2002, 19(10): 1509-1512.
AN Long, TANG Yan, ZHENG Hou-Zhi, ZHANG Ji-Dong, TAN Ping-Heng, YANG Fu-Hua, JI Yang, CHEN Yuan-Zhen. Occupation Modulation of Higher Subbands in a Three-Barrier Tunneling Structure with a Magnetic Field[J]. Chin. Phys. Lett., 2002, 19(10): 1509-1512.
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AN Long, TANG Yan, ZHENG Hou-Zhi, ZHANG Ji-Dong, TAN Ping-Heng, YANG Fu-Hua, JI Yang, CHEN Yuan-Zhen. Occupation Modulation of Higher Subbands in a Three-Barrier Tunneling Structure with a Magnetic Field[J]. Chin. Phys. Lett., 2002, 19(10): 1509-1512.
AN Long, TANG Yan, ZHENG Hou-Zhi, ZHANG Ji-Dong, TAN Ping-Heng, YANG Fu-Hua, JI Yang, CHEN Yuan-Zhen. Occupation Modulation of Higher Subbands in a Three-Barrier Tunneling Structure with a Magnetic Field[J]. Chin. Phys. Lett., 2002, 19(10): 1509-1512.
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