Abstract

Experimental results from a video-rate terahertz interferometric imaging system are presented. The source emits continuous narrow bandwidth radiation at 0.1THz. The 2D image of a point source is reconstructed at a rate of 16ms per frame with a four-element detector array. The image resolution and quality are affected by the number of detectors, the configuration of the detection array, and how well the baselines are calibrated. Details of the hardware system and video-rate terahertz image are presented.

© 2009 Optical Society of America

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  1. D. M. Mittleman, Sensing with Terahertz Radiation (Springer Series in Optical Sciences) (Springer, 2002).
  2. J. F. Federici, B. Schulkin, F. Huang, D. Gary, R. Barat, F. Oliveira, and D. Zimdars, “THz imaging and sensing for security applications--explosives, weapons and drugs,” Semicond. Sci. Technol. 20, S266 (2005).
    [CrossRef]
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    [CrossRef]
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    [CrossRef] [PubMed]
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    [CrossRef]
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    [CrossRef]
  10. A. R. Thompson, J. M. Moran, and G. W. Swenson, Interferometry and Synthesis in Radio Astronomy (Krieger, 1991).
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    [CrossRef]
  12. A. Bandyopadhyay, A. Stepanov, B. Schulkin, M. D. Federici, A. Sengupta, D. Gary, J. F. Federici, R. Barat, Z.-H. Michalopoulou, and D. Zimdars, “Terahertz interferometric and synthetic aperture imaging,” J. Opt. Soc. Am. A 23, 1168-1178 (2006).
    [CrossRef]
  13. A. M. Sinyukov, A. Bandyopadhyay, A. Sengupta, R. B. Barat, D. E. Gary, Z.-H. Michalopoulou, D. Zimdars, and J. F. Federici, “Terahertz interferometric and synthetic aperture imaging,” Int. J. High Speed Electron. Syst. 17, 431-443 (2007).
    [CrossRef]
  14. K. P. Walsh, B. Schulkin, D. Gary, J. F. Federici, R. Barat, and D. Zimdars, “Terahertz near-field interferometric and synthetic aperture imaging,” Proc. SPIE 5411, 9-17 (2004).
    [CrossRef]
  15. A. M. Sinyukov, Z. Liu, Y. L. Hor, K. Su, R. B. Barat, D. E. Gary, Z.-H. Michalopoulou, I. Zorych, J. F. Federici, and D. Zimdars, “Rapid-phase modulation of terahertz radiation for high-speed terahertz imaging and spectroscopy,” Opt. Lett. 33, 1593-1595 (2008).
    [CrossRef] [PubMed]

2008 (2)

2007 (2)

W. L. Chan, J. Deibel, and D. M. Mittleman, “Imaging with terahertz radiation,” Rep. Prog. Phys. 70, 1325-1379 (2007).
[CrossRef]

A. M. Sinyukov, A. Bandyopadhyay, A. Sengupta, R. B. Barat, D. E. Gary, Z.-H. Michalopoulou, D. Zimdars, and J. F. Federici, “Terahertz interferometric and synthetic aperture imaging,” Int. J. High Speed Electron. Syst. 17, 431-443 (2007).
[CrossRef]

2006 (2)

2005 (1)

J. F. Federici, B. Schulkin, F. Huang, D. Gary, R. Barat, F. Oliveira, and D. Zimdars, “THz imaging and sensing for security applications--explosives, weapons and drugs,” Semicond. Sci. Technol. 20, S266 (2005).
[CrossRef]

2004 (2)

F. Huang, B. Schulkin, H. Altan, J. F. Federici, D. Gary, R. Barat, D. Zimdars, M. Chen, and D. B. Tanner, “Terahertz study of 1,3,5-trinitro-s-triazine by time-domain and Fourier transform infrared spectroscopy,” Appl. Phys. Lett. 85, 5535-5537 (2004).
[CrossRef]

K. P. Walsh, B. Schulkin, D. Gary, J. F. Federici, R. Barat, and D. Zimdars, “Terahertz near-field interferometric and synthetic aperture imaging,” Proc. SPIE 5411, 9-17 (2004).
[CrossRef]

2003 (1)

J. F. Federici, D. Gary, B. Schulkin, F. Huang, H. Altan, R. Barat, and D. Zimdars, “Terahertz imaging using an interferometric array,” Appl. Phys. Lett. 83, 2477-2479 (2003).
[CrossRef]

2002 (1)

A. Nahata, J. T. Yardley, and T. F. Heinz, “Two-dimensional imaging of continuous-wave terahertz radiation using electro-optic detection,” Appl. Phys. Lett. 81, 963-965 (2002).
[CrossRef]

1996 (1)

Q. Wu, T. D. Hewitt, and X.-C. Zhang, “Two-dimensional electro-optic imaging of THz beams,” Appl. Phys. Lett. 69, 1026-1028 (1996).
[CrossRef]

1995 (1)

Altan, H.

F. Huang, B. Schulkin, H. Altan, J. F. Federici, D. Gary, R. Barat, D. Zimdars, M. Chen, and D. B. Tanner, “Terahertz study of 1,3,5-trinitro-s-triazine by time-domain and Fourier transform infrared spectroscopy,” Appl. Phys. Lett. 85, 5535-5537 (2004).
[CrossRef]

J. F. Federici, D. Gary, B. Schulkin, F. Huang, H. Altan, R. Barat, and D. Zimdars, “Terahertz imaging using an interferometric array,” Appl. Phys. Lett. 83, 2477-2479 (2003).
[CrossRef]

Bandyopadhyay, A.

A. M. Sinyukov, A. Bandyopadhyay, A. Sengupta, R. B. Barat, D. E. Gary, Z.-H. Michalopoulou, D. Zimdars, and J. F. Federici, “Terahertz interferometric and synthetic aperture imaging,” Int. J. High Speed Electron. Syst. 17, 431-443 (2007).
[CrossRef]

A. Bandyopadhyay, A. Stepanov, B. Schulkin, M. D. Federici, A. Sengupta, D. Gary, J. F. Federici, R. Barat, Z.-H. Michalopoulou, and D. Zimdars, “Terahertz interferometric and synthetic aperture imaging,” J. Opt. Soc. Am. A 23, 1168-1178 (2006).
[CrossRef]

Baraniuk, R. G.

W. L. Chan, K. Charan, D. Takhar, K. F. Kelly, R. G. Baraniuk, and D. M. Mittleman, “A single-pixel terahertz imaging system based on compressed sensing,” Appl. Phys. Lett. 93, 121105 (2008).
[CrossRef]

Barat, R.

A. Bandyopadhyay, A. Stepanov, B. Schulkin, M. D. Federici, A. Sengupta, D. Gary, J. F. Federici, R. Barat, Z.-H. Michalopoulou, and D. Zimdars, “Terahertz interferometric and synthetic aperture imaging,” J. Opt. Soc. Am. A 23, 1168-1178 (2006).
[CrossRef]

J. F. Federici, B. Schulkin, F. Huang, D. Gary, R. Barat, F. Oliveira, and D. Zimdars, “THz imaging and sensing for security applications--explosives, weapons and drugs,” Semicond. Sci. Technol. 20, S266 (2005).
[CrossRef]

F. Huang, B. Schulkin, H. Altan, J. F. Federici, D. Gary, R. Barat, D. Zimdars, M. Chen, and D. B. Tanner, “Terahertz study of 1,3,5-trinitro-s-triazine by time-domain and Fourier transform infrared spectroscopy,” Appl. Phys. Lett. 85, 5535-5537 (2004).
[CrossRef]

K. P. Walsh, B. Schulkin, D. Gary, J. F. Federici, R. Barat, and D. Zimdars, “Terahertz near-field interferometric and synthetic aperture imaging,” Proc. SPIE 5411, 9-17 (2004).
[CrossRef]

J. F. Federici, D. Gary, B. Schulkin, F. Huang, H. Altan, R. Barat, and D. Zimdars, “Terahertz imaging using an interferometric array,” Appl. Phys. Lett. 83, 2477-2479 (2003).
[CrossRef]

Barat, R. B.

A. M. Sinyukov, Z. Liu, Y. L. Hor, K. Su, R. B. Barat, D. E. Gary, Z.-H. Michalopoulou, I. Zorych, J. F. Federici, and D. Zimdars, “Rapid-phase modulation of terahertz radiation for high-speed terahertz imaging and spectroscopy,” Opt. Lett. 33, 1593-1595 (2008).
[CrossRef] [PubMed]

A. M. Sinyukov, A. Bandyopadhyay, A. Sengupta, R. B. Barat, D. E. Gary, Z.-H. Michalopoulou, D. Zimdars, and J. F. Federici, “Terahertz interferometric and synthetic aperture imaging,” Int. J. High Speed Electron. Syst. 17, 431-443 (2007).
[CrossRef]

Bastiaans, G. J.

Chan, W. L.

W. L. Chan, K. Charan, D. Takhar, K. F. Kelly, R. G. Baraniuk, and D. M. Mittleman, “A single-pixel terahertz imaging system based on compressed sensing,” Appl. Phys. Lett. 93, 121105 (2008).
[CrossRef]

W. L. Chan, J. Deibel, and D. M. Mittleman, “Imaging with terahertz radiation,” Rep. Prog. Phys. 70, 1325-1379 (2007).
[CrossRef]

Charan, K.

W. L. Chan, K. Charan, D. Takhar, K. F. Kelly, R. G. Baraniuk, and D. M. Mittleman, “A single-pixel terahertz imaging system based on compressed sensing,” Appl. Phys. Lett. 93, 121105 (2008).
[CrossRef]

Chen, M.

F. Huang, B. Schulkin, H. Altan, J. F. Federici, D. Gary, R. Barat, D. Zimdars, M. Chen, and D. B. Tanner, “Terahertz study of 1,3,5-trinitro-s-triazine by time-domain and Fourier transform infrared spectroscopy,” Appl. Phys. Lett. 85, 5535-5537 (2004).
[CrossRef]

Chen, Y.

Deibel, J.

W. L. Chan, J. Deibel, and D. M. Mittleman, “Imaging with terahertz radiation,” Rep. Prog. Phys. 70, 1325-1379 (2007).
[CrossRef]

Federici, J. F.

A. M. Sinyukov, Z. Liu, Y. L. Hor, K. Su, R. B. Barat, D. E. Gary, Z.-H. Michalopoulou, I. Zorych, J. F. Federici, and D. Zimdars, “Rapid-phase modulation of terahertz radiation for high-speed terahertz imaging and spectroscopy,” Opt. Lett. 33, 1593-1595 (2008).
[CrossRef] [PubMed]

A. M. Sinyukov, A. Bandyopadhyay, A. Sengupta, R. B. Barat, D. E. Gary, Z.-H. Michalopoulou, D. Zimdars, and J. F. Federici, “Terahertz interferometric and synthetic aperture imaging,” Int. J. High Speed Electron. Syst. 17, 431-443 (2007).
[CrossRef]

A. Bandyopadhyay, A. Stepanov, B. Schulkin, M. D. Federici, A. Sengupta, D. Gary, J. F. Federici, R. Barat, Z.-H. Michalopoulou, and D. Zimdars, “Terahertz interferometric and synthetic aperture imaging,” J. Opt. Soc. Am. A 23, 1168-1178 (2006).
[CrossRef]

J. F. Federici, B. Schulkin, F. Huang, D. Gary, R. Barat, F. Oliveira, and D. Zimdars, “THz imaging and sensing for security applications--explosives, weapons and drugs,” Semicond. Sci. Technol. 20, S266 (2005).
[CrossRef]

F. Huang, B. Schulkin, H. Altan, J. F. Federici, D. Gary, R. Barat, D. Zimdars, M. Chen, and D. B. Tanner, “Terahertz study of 1,3,5-trinitro-s-triazine by time-domain and Fourier transform infrared spectroscopy,” Appl. Phys. Lett. 85, 5535-5537 (2004).
[CrossRef]

K. P. Walsh, B. Schulkin, D. Gary, J. F. Federici, R. Barat, and D. Zimdars, “Terahertz near-field interferometric and synthetic aperture imaging,” Proc. SPIE 5411, 9-17 (2004).
[CrossRef]

J. F. Federici, D. Gary, B. Schulkin, F. Huang, H. Altan, R. Barat, and D. Zimdars, “Terahertz imaging using an interferometric array,” Appl. Phys. Lett. 83, 2477-2479 (2003).
[CrossRef]

Federici, M. D.

Gary, D.

A. Bandyopadhyay, A. Stepanov, B. Schulkin, M. D. Federici, A. Sengupta, D. Gary, J. F. Federici, R. Barat, Z.-H. Michalopoulou, and D. Zimdars, “Terahertz interferometric and synthetic aperture imaging,” J. Opt. Soc. Am. A 23, 1168-1178 (2006).
[CrossRef]

J. F. Federici, B. Schulkin, F. Huang, D. Gary, R. Barat, F. Oliveira, and D. Zimdars, “THz imaging and sensing for security applications--explosives, weapons and drugs,” Semicond. Sci. Technol. 20, S266 (2005).
[CrossRef]

F. Huang, B. Schulkin, H. Altan, J. F. Federici, D. Gary, R. Barat, D. Zimdars, M. Chen, and D. B. Tanner, “Terahertz study of 1,3,5-trinitro-s-triazine by time-domain and Fourier transform infrared spectroscopy,” Appl. Phys. Lett. 85, 5535-5537 (2004).
[CrossRef]

K. P. Walsh, B. Schulkin, D. Gary, J. F. Federici, R. Barat, and D. Zimdars, “Terahertz near-field interferometric and synthetic aperture imaging,” Proc. SPIE 5411, 9-17 (2004).
[CrossRef]

J. F. Federici, D. Gary, B. Schulkin, F. Huang, H. Altan, R. Barat, and D. Zimdars, “Terahertz imaging using an interferometric array,” Appl. Phys. Lett. 83, 2477-2479 (2003).
[CrossRef]

Gary, D. E.

A. M. Sinyukov, Z. Liu, Y. L. Hor, K. Su, R. B. Barat, D. E. Gary, Z.-H. Michalopoulou, I. Zorych, J. F. Federici, and D. Zimdars, “Rapid-phase modulation of terahertz radiation for high-speed terahertz imaging and spectroscopy,” Opt. Lett. 33, 1593-1595 (2008).
[CrossRef] [PubMed]

A. M. Sinyukov, A. Bandyopadhyay, A. Sengupta, R. B. Barat, D. E. Gary, Z.-H. Michalopoulou, D. Zimdars, and J. F. Federici, “Terahertz interferometric and synthetic aperture imaging,” Int. J. High Speed Electron. Syst. 17, 431-443 (2007).
[CrossRef]

Heinz, T. F.

A. Nahata, J. T. Yardley, and T. F. Heinz, “Two-dimensional imaging of continuous-wave terahertz radiation using electro-optic detection,” Appl. Phys. Lett. 81, 963-965 (2002).
[CrossRef]

Hewitt, T. D.

Q. Wu, T. D. Hewitt, and X.-C. Zhang, “Two-dimensional electro-optic imaging of THz beams,” Appl. Phys. Lett. 69, 1026-1028 (1996).
[CrossRef]

Hor, Y. L.

Hu, B. B.

Huang, F.

J. F. Federici, B. Schulkin, F. Huang, D. Gary, R. Barat, F. Oliveira, and D. Zimdars, “THz imaging and sensing for security applications--explosives, weapons and drugs,” Semicond. Sci. Technol. 20, S266 (2005).
[CrossRef]

F. Huang, B. Schulkin, H. Altan, J. F. Federici, D. Gary, R. Barat, D. Zimdars, M. Chen, and D. B. Tanner, “Terahertz study of 1,3,5-trinitro-s-triazine by time-domain and Fourier transform infrared spectroscopy,” Appl. Phys. Lett. 85, 5535-5537 (2004).
[CrossRef]

J. F. Federici, D. Gary, B. Schulkin, F. Huang, H. Altan, R. Barat, and D. Zimdars, “Terahertz imaging using an interferometric array,” Appl. Phys. Lett. 83, 2477-2479 (2003).
[CrossRef]

Kelly, K. F.

W. L. Chan, K. Charan, D. Takhar, K. F. Kelly, R. G. Baraniuk, and D. M. Mittleman, “A single-pixel terahertz imaging system based on compressed sensing,” Appl. Phys. Lett. 93, 121105 (2008).
[CrossRef]

Liu, H.-B.

Liu, Z.

Michalopoulou, Z.-H.

Mittleman, D. M.

W. L. Chan, K. Charan, D. Takhar, K. F. Kelly, R. G. Baraniuk, and D. M. Mittleman, “A single-pixel terahertz imaging system based on compressed sensing,” Appl. Phys. Lett. 93, 121105 (2008).
[CrossRef]

W. L. Chan, J. Deibel, and D. M. Mittleman, “Imaging with terahertz radiation,” Rep. Prog. Phys. 70, 1325-1379 (2007).
[CrossRef]

D. M. Mittleman, Sensing with Terahertz Radiation (Springer Series in Optical Sciences) (Springer, 2002).

Moran, J. M.

A. R. Thompson, J. M. Moran, and G. W. Swenson, Interferometry and Synthesis in Radio Astronomy (Krieger, 1991).

Nahata, A.

A. Nahata, J. T. Yardley, and T. F. Heinz, “Two-dimensional imaging of continuous-wave terahertz radiation using electro-optic detection,” Appl. Phys. Lett. 81, 963-965 (2002).
[CrossRef]

Nuss, M. C.

Oliveira, F.

J. F. Federici, B. Schulkin, F. Huang, D. Gary, R. Barat, F. Oliveira, and D. Zimdars, “THz imaging and sensing for security applications--explosives, weapons and drugs,” Semicond. Sci. Technol. 20, S266 (2005).
[CrossRef]

Schulkin, B.

A. Bandyopadhyay, A. Stepanov, B. Schulkin, M. D. Federici, A. Sengupta, D. Gary, J. F. Federici, R. Barat, Z.-H. Michalopoulou, and D. Zimdars, “Terahertz interferometric and synthetic aperture imaging,” J. Opt. Soc. Am. A 23, 1168-1178 (2006).
[CrossRef]

J. F. Federici, B. Schulkin, F. Huang, D. Gary, R. Barat, F. Oliveira, and D. Zimdars, “THz imaging and sensing for security applications--explosives, weapons and drugs,” Semicond. Sci. Technol. 20, S266 (2005).
[CrossRef]

F. Huang, B. Schulkin, H. Altan, J. F. Federici, D. Gary, R. Barat, D. Zimdars, M. Chen, and D. B. Tanner, “Terahertz study of 1,3,5-trinitro-s-triazine by time-domain and Fourier transform infrared spectroscopy,” Appl. Phys. Lett. 85, 5535-5537 (2004).
[CrossRef]

K. P. Walsh, B. Schulkin, D. Gary, J. F. Federici, R. Barat, and D. Zimdars, “Terahertz near-field interferometric and synthetic aperture imaging,” Proc. SPIE 5411, 9-17 (2004).
[CrossRef]

J. F. Federici, D. Gary, B. Schulkin, F. Huang, H. Altan, R. Barat, and D. Zimdars, “Terahertz imaging using an interferometric array,” Appl. Phys. Lett. 83, 2477-2479 (2003).
[CrossRef]

Sengupta, A.

A. M. Sinyukov, A. Bandyopadhyay, A. Sengupta, R. B. Barat, D. E. Gary, Z.-H. Michalopoulou, D. Zimdars, and J. F. Federici, “Terahertz interferometric and synthetic aperture imaging,” Int. J. High Speed Electron. Syst. 17, 431-443 (2007).
[CrossRef]

A. Bandyopadhyay, A. Stepanov, B. Schulkin, M. D. Federici, A. Sengupta, D. Gary, J. F. Federici, R. Barat, Z.-H. Michalopoulou, and D. Zimdars, “Terahertz interferometric and synthetic aperture imaging,” J. Opt. Soc. Am. A 23, 1168-1178 (2006).
[CrossRef]

Sinyukov, A. M.

A. M. Sinyukov, Z. Liu, Y. L. Hor, K. Su, R. B. Barat, D. E. Gary, Z.-H. Michalopoulou, I. Zorych, J. F. Federici, and D. Zimdars, “Rapid-phase modulation of terahertz radiation for high-speed terahertz imaging and spectroscopy,” Opt. Lett. 33, 1593-1595 (2008).
[CrossRef] [PubMed]

A. M. Sinyukov, A. Bandyopadhyay, A. Sengupta, R. B. Barat, D. E. Gary, Z.-H. Michalopoulou, D. Zimdars, and J. F. Federici, “Terahertz interferometric and synthetic aperture imaging,” Int. J. High Speed Electron. Syst. 17, 431-443 (2007).
[CrossRef]

Stepanov, A.

Su, K.

Swenson, G. W.

A. R. Thompson, J. M. Moran, and G. W. Swenson, Interferometry and Synthesis in Radio Astronomy (Krieger, 1991).

Takhar, D.

W. L. Chan, K. Charan, D. Takhar, K. F. Kelly, R. G. Baraniuk, and D. M. Mittleman, “A single-pixel terahertz imaging system based on compressed sensing,” Appl. Phys. Lett. 93, 121105 (2008).
[CrossRef]

Tanner, D. B.

F. Huang, B. Schulkin, H. Altan, J. F. Federici, D. Gary, R. Barat, D. Zimdars, M. Chen, and D. B. Tanner, “Terahertz study of 1,3,5-trinitro-s-triazine by time-domain and Fourier transform infrared spectroscopy,” Appl. Phys. Lett. 85, 5535-5537 (2004).
[CrossRef]

Thompson, A. R.

A. R. Thompson, J. M. Moran, and G. W. Swenson, Interferometry and Synthesis in Radio Astronomy (Krieger, 1991).

Walsh, K. P.

K. P. Walsh, B. Schulkin, D. Gary, J. F. Federici, R. Barat, and D. Zimdars, “Terahertz near-field interferometric and synthetic aperture imaging,” Proc. SPIE 5411, 9-17 (2004).
[CrossRef]

Wu, Q.

Q. Wu, T. D. Hewitt, and X.-C. Zhang, “Two-dimensional electro-optic imaging of THz beams,” Appl. Phys. Lett. 69, 1026-1028 (1996).
[CrossRef]

Yardley, J. T.

A. Nahata, J. T. Yardley, and T. F. Heinz, “Two-dimensional imaging of continuous-wave terahertz radiation using electro-optic detection,” Appl. Phys. Lett. 81, 963-965 (2002).
[CrossRef]

Zhang, X.-C.

Zimdars, D.

A. M. Sinyukov, Z. Liu, Y. L. Hor, K. Su, R. B. Barat, D. E. Gary, Z.-H. Michalopoulou, I. Zorych, J. F. Federici, and D. Zimdars, “Rapid-phase modulation of terahertz radiation for high-speed terahertz imaging and spectroscopy,” Opt. Lett. 33, 1593-1595 (2008).
[CrossRef] [PubMed]

A. M. Sinyukov, A. Bandyopadhyay, A. Sengupta, R. B. Barat, D. E. Gary, Z.-H. Michalopoulou, D. Zimdars, and J. F. Federici, “Terahertz interferometric and synthetic aperture imaging,” Int. J. High Speed Electron. Syst. 17, 431-443 (2007).
[CrossRef]

A. Bandyopadhyay, A. Stepanov, B. Schulkin, M. D. Federici, A. Sengupta, D. Gary, J. F. Federici, R. Barat, Z.-H. Michalopoulou, and D. Zimdars, “Terahertz interferometric and synthetic aperture imaging,” J. Opt. Soc. Am. A 23, 1168-1178 (2006).
[CrossRef]

J. F. Federici, B. Schulkin, F. Huang, D. Gary, R. Barat, F. Oliveira, and D. Zimdars, “THz imaging and sensing for security applications--explosives, weapons and drugs,” Semicond. Sci. Technol. 20, S266 (2005).
[CrossRef]

F. Huang, B. Schulkin, H. Altan, J. F. Federici, D. Gary, R. Barat, D. Zimdars, M. Chen, and D. B. Tanner, “Terahertz study of 1,3,5-trinitro-s-triazine by time-domain and Fourier transform infrared spectroscopy,” Appl. Phys. Lett. 85, 5535-5537 (2004).
[CrossRef]

K. P. Walsh, B. Schulkin, D. Gary, J. F. Federici, R. Barat, and D. Zimdars, “Terahertz near-field interferometric and synthetic aperture imaging,” Proc. SPIE 5411, 9-17 (2004).
[CrossRef]

J. F. Federici, D. Gary, B. Schulkin, F. Huang, H. Altan, R. Barat, and D. Zimdars, “Terahertz imaging using an interferometric array,” Appl. Phys. Lett. 83, 2477-2479 (2003).
[CrossRef]

Zorych, I.

Appl. Phys. Lett. (5)

F. Huang, B. Schulkin, H. Altan, J. F. Federici, D. Gary, R. Barat, D. Zimdars, M. Chen, and D. B. Tanner, “Terahertz study of 1,3,5-trinitro-s-triazine by time-domain and Fourier transform infrared spectroscopy,” Appl. Phys. Lett. 85, 5535-5537 (2004).
[CrossRef]

W. L. Chan, K. Charan, D. Takhar, K. F. Kelly, R. G. Baraniuk, and D. M. Mittleman, “A single-pixel terahertz imaging system based on compressed sensing,” Appl. Phys. Lett. 93, 121105 (2008).
[CrossRef]

Q. Wu, T. D. Hewitt, and X.-C. Zhang, “Two-dimensional electro-optic imaging of THz beams,” Appl. Phys. Lett. 69, 1026-1028 (1996).
[CrossRef]

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[CrossRef]

J. F. Federici, D. Gary, B. Schulkin, F. Huang, H. Altan, R. Barat, and D. Zimdars, “Terahertz imaging using an interferometric array,” Appl. Phys. Lett. 83, 2477-2479 (2003).
[CrossRef]

Int. J. High Speed Electron. Syst. (1)

A. M. Sinyukov, A. Bandyopadhyay, A. Sengupta, R. B. Barat, D. E. Gary, Z.-H. Michalopoulou, D. Zimdars, and J. F. Federici, “Terahertz interferometric and synthetic aperture imaging,” Int. J. High Speed Electron. Syst. 17, 431-443 (2007).
[CrossRef]

J. Opt. Soc. Am. A (1)

Opt. Express (1)

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Proc. SPIE (1)

K. P. Walsh, B. Schulkin, D. Gary, J. F. Federici, R. Barat, and D. Zimdars, “Terahertz near-field interferometric and synthetic aperture imaging,” Proc. SPIE 5411, 9-17 (2004).
[CrossRef]

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[CrossRef]

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J. F. Federici, B. Schulkin, F. Huang, D. Gary, R. Barat, F. Oliveira, and D. Zimdars, “THz imaging and sensing for security applications--explosives, weapons and drugs,” Semicond. Sci. Technol. 20, S266 (2005).
[CrossRef]

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D. M. Mittleman, Sensing with Terahertz Radiation (Springer Series in Optical Sciences) (Springer, 2002).

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Supplementary Material (2)

» Media 1: AVI (502 KB)     
» Media 2: AVI (1806 KB)     

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Figures (9)

Fig. 1
Fig. 1

Geometry of an interferometer baseline where a delay τ is inserted in one detector in order to steer the phase center.

Fig. 2
Fig. 2

THz imaging system setup (a) and the detector array configuration (b).

Fig. 3
Fig. 3

Spectrum of the four detectors acquired from the digitizer.

Fig. 4
Fig. 4

Reconstructed image (without baseline calibration) from four detectors. Media 1 shows the corresponding movie of this moving source along the horizontal direction.

Fig. 5
Fig. 5

Image synthesis process for experimental data (top row) and simulation (bottom row). From left to right are reconstructed images at frequency 100, 70, and 30 GHz and the frequency synthesized images from these three frequency images, respectively.

Fig. 6
Fig. 6

Reconstructed and cleaned image without baseline calibration for a moving source along a 20 mm × 20 mm square. The real source trace is from ( 0 , 0 ) ( 10 , 0 ) ( 10 , 10 ) ( 10 , 10 ) ( 10 , 10 ) ( 10 , 10 ) ( 10 , 0 ) ( 0 , 0 ) . Since the images are shifted ( 40 , 40 ) mm to the upper left, the square trace is shifted accordingly. Note the center coordinate of these images is ( 50 , 50 ) mm .

Fig. 7
Fig. 7

Phase difference of detectors 2, 3, and 4 (from top to bottom row) relative to detector 1 before (left column) and after (right column) baseline calibration for 5 source locations at (0,0), ( 10 , 10 ) , ( 10 , 10 ) , (10,10), ( 10 , 10 ) .

Fig. 8
Fig. 8

Reconstructed and cleaned image after baseline calibration for a moving source along a 20 mm × 20 mm square. The source trace is from ( 0 , 0 ) ( 10 , 0 ) ( 10 , 10 ) ( 10 , 10 ) ( 10 , 10 ) ( 10 , 10 ) ( 10 , 0 ) ( 0 , 0 ) .

Fig. 9
Fig. 9

Reconstructed video for a source moving along a 20 × 20 mm square after baseline calibration (Media 2).

Equations (3)

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θ = 1 B λ ,
Δ L = Z 0 B λ ,
σ E ( ξ , η ) = l = 1 N ( N 1 ) / 2 [ Re ( A l e i Δ ϕ l ) cos ( k ( u l ξ + v l η ) ) Im ( A l e i Δ ϕ l ) sin ( k ( u l ξ + v l η ) ) ] ,

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