M.Z. Tidrow

Publications (4)6.19 Total impact

• Article: Demonstration of Megapixel Dual-Band QWIP Focal Plane Array

  S.D. Gunapala, S.V. Bandara, J.K. Liu, J.M. Mumolo, D.Z. Ting, C.J. Hill, J. Nguyen, B. Simolon, J. Woolaway, S.C. Wang, Weiping Li, P.D. LeVan, M.Z. Tidrow
  [show abstract] [hide abstract]
  ABSTRACT: Quantum well infrared photodetectors (QWIPs) are well known for their stability, high pixel-pixel uniformity and high pixel operability which are quintessential parameters for large area imaging arrays. In this paper we report the first demonstration of the megapixel-simultaneously-readable and pixel-co-registered dual-band QWIP focal plane array (FPA). The dual-band QWIP device was developed by stacking two multi-quantum-well stacks tuned to absorb two different infrared wavelengths. The full width at half maximum (FWHM) of the midwave infrared (MWIR) band extends from 4.4-5.1 ¿m and FWHM of the long-wave infrared (LWIR) band extends from 7.8-8.8 ¿m. Dual-band QWIP detector arrays were hybridized with direct injection 30 ¿m pixel pitch megapixel dual-band simultaneously readable CMOS read out integrated circuits using the indium bump hybridization technique. The initial dual-band megapixel QWIP FPAs were cooled to 68 K operating temperature. The preliminary data taken from the first megapixel QWIP FPA has shown system NE¿T of 27 and 40 mK for MWIR and LWIR bands, respectively.
  IEEE Journal of Quantum Electronics 03/2010; · 1.88 Impact Factor
• Source

  Available from: nasa.gov

  Article: 1024 × 1024 pixel mid-wavelength and long-wavelength infrared QWIP focal plane arrays for imaging applications

  S D Gunapala, S V Bandara, J K Liu, C J Hill, S B Rafol, J M Mumolo, J T Trinh, M Z Tidrow, P D LeVan
  [show abstract] [hide abstract]
  ABSTRACT: Mid-wavelength infrared (MWIR) and long-wavelength infrared (LWIR) 1024 × 1024 pixel quantum well infrared photodetector (QWIP) focal planes have been demonstrated with excellent imaging performance. The MWIR QWIP detector array has demonstrated a noise equivalent differential temperature (NEΔT) of 17 mK at a 95 K operating temperature with f/2.5 optics at 300 K background and the LWIR detector array has demonstrated a NEΔT of 13 mK at a 70 K operating temperature with the same optical and background conditions as the MWIR detector array after the subtraction of system noise. Both MWIR and LWIR focal planes have shown background limited performance (BLIP) at 90 K and 70 K operating temperatures respectively, with similar optical and background conditions. In this paper, we will discuss the performance in terms of quantum efficiency, NEΔT, uniformity, operability and modulation transfer functions.
  Semiconductor Science and Technology 03/2005; 20(5):473. · 1.72 Impact Factor
• Article: Development of mid-wavelength and long-wavelength megapixel portable QWIP imaging cameras

  S.D. Gunapala, S.V. Bandara, J.K. Liu, C.J. Hill, S.B. Rafol, J.M. Mumolo, J.T. Trinh, M.Z. Tidrow, P.D. LeVan
  [show abstract] [hide abstract]
  ABSTRACT: Mid-wavelength infrared (MWIR) and long-wavelength infrared (LWIR) megapixel quantum well infrared photodetector (QWIP) focal plane arrays have been demonstrated with excellent imaging performance. The MWIR detector array has shown noise equivalent temperature difference (NETD) of 17 mK at 95 K operating temperature with f/2.5 optics at 300 K background and the LWIR detector array has given NETD of 13 m K at 70 K operating temperature with the same optical and background conditions as the MWIR array. Two portable prototype infrared cameras were fabricated using these two focal planes. The MWIR and the LWIR prototype cameras with similar optics have shown background limited performance (BLIP) at 90 K and 70 K operating temperatures respectively, at 300 K background. In this paper, we will discuss their performance in quantum efficiency, NETD, uniformity, and operability.
  Infrared Physics & Technology 47:67-75. · 1.30 Impact Factor
• Article: 1024×1024 Format pixel co-located simultaneously readable dual-band QWIP focal plane

  S.D. Gunapala, S.V. Bandara, J.K. Liu, J.M. Mumolo, D.Z. Ting, C.J. Hill, J. Nguyen, B. Simolon, J. Woolaway, S.C. Wang, W. Li, P.D. LeVan, M.Z. Tidrow
  [show abstract] [hide abstract]
  ABSTRACT: This paper reports the first demonstration of the megapixel-simultaneously-readable and pixel-co-registered dual-band quantum well infrared photodetector (QWIP) focal plane array (FPA). The dual-band QWIP device was developed by stacking two multi-quantum-well stacks tuned to absorb two different infrared wavelengths. The full width at half maximum (FWHM) of the mid-wave infrared (MWIR) band extends from 4.4 to 5.1 μm and the FWHM of a long-wave infrared (LWIR) band extends from 7.8 to 8.8 μm. Dual-band QWIP detector arrays were hybridized with custom fabricated direct injection read out integrated circuits (ROICs) using the indium bump hybridization technique. The initial dual-band megapixel QWIP FPAs were cooled to 70 K operating temperature. The preliminary data taken from the first megapixel QWIP FPA has shown system NEΔT of 27 and 40 mK for MWIR and LWIR bands, respectively.
  Infrared Physics & Technology 52(6):395-398. · 1.30 Impact Factor