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Subject: search.filters.subject.INFRARED DETECTORS

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Now showing 1 - 3 of 3
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    BOLOMETRIC YBA2CU3O7-X INFRARED DETECTOR
    (1991-09-12)
    TSENG, TY
    ;
    CHANG, CY
    ;
    HAUNG, CJ
    ;
    CHEN, MC
    ;
    電子工程學系及電子研究所
    Results of the measurement of optical detection in YBa2Cu3O7-x superconducting epitaxial films at a wavelength of 0.94-mu-m are presented. These films show bolometric responses at temperatures in the resistive transition regions which are strongly dependent on the bias current. For 0.94-mu-m radiation, electronically chopped at 20 Hz, measurement of a meander bridge yields a bolometric responsivity of approximately 6.1 V/W.
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    VERTICAL INTEGRATION OF A GAAS/ALGAAS QUANTUM-WELL LASER AND A LONG-WAVELENGTH QUANTUM-WELL INFRARED PHOTODETECTOR
    (1994-03-03)
    TSANG, JS
    ;
    LEE, CP
    ;
    TSAI, KL
    ;
    CHEN, HR
    ;
    電子工程學系及電子研究所
    A short-wavelength (approximately 0.8mum) GaAs/AlGaAs graded-index separate-confinement heterostructure quantum-well laser has been monolithically integrated with a long-wavelength (approximately 8mum) GaAs/AlGaAs multiple-quantum-well infra-red photodetector on a semi-insulating GaAs substrate by molecular beam epitaxy. The vertical integration method is used and the combined structure is a pinin structure. Both the laser and detector exhibit excellent characteristics. At room temperature, the ridge waveguide laser has an extremely low threshold current of 25 mA and a differential quantum efficiency above 65% with a stripe width of 20mum. The quantum-well detector has a peak response at 8mum and a responsivity of 0.7A/W.
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    2-COLOR QUANTUM-WELL INFRARED PHOTODETECTOR WITH PEAK SENSITIVITIES AT 3.9 MU-M AND 8.1 MU-M
    (1994-08-04)
    TSAI, KL
    ;
    LEE, CP
    ;
    TSANG, JS
    ;
    CHEN, HR
    ;
    電子工程學系及電子研究所
    A two-colour infra-red photodetector using multistacks of GaAs/AlGaAs quantum wells is demonstrated. The response peaks are at 3.9 and 8.1 mum. The peak responsivities of the detector are 0.4A/W and 35mA/W for 8.1mum and 3.9mum bands, respectively. The detectivities of the 3.9 and 8.1 mum bands are 7.5 x 10(9) and 1.5 x 10(10)cmHz1/2/W. These values are the best reported results for two-colour detectors with peak sensitivities in the spectral regions of 3-5 and 8-12mum.