Jpn. J. Appl. Phys. 44 (2005) pp. 1771-1776  |Previous Article| |Next Article|  |Table of Contents|
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Electric Field Imaging Using Intense Half-Cycle Terahertz Pulses

Rakchanok Rungsawang, Keiji Tukamoto and Toshiaki Hattori

(Received July 17, 2004; accepted December 15, 2004; published April 8, 2005)

Characteristics of terahertz (THz) imaging using approximately half-cycle THz pulses were studied using a large-aperture biased photoconductive antenna which emits an intense THz field with a large THz beam. Studies of the dependence of the THz image quality on delay time show that real-time imaging is possible if the probe pulse is timed appropriately. The best images were observed at a time window when the THz field had a steep transient. This allows two-dimensional imaging in a fixed-time mode, which enables observation of a nonstationary object. Using phase-sensitive electrooptic detection and scanning a delay time, not only two-dimensional time-domain spectroscopy is possible, but frequency-resolved images are also available. Depending on the frequency, we found that images of the actual shape or the edge of an object were obtained.

KEYWORDS: terahertz imaging, half-cycle electric pulse, photoconductive antenna, phase-sensitive detection, frequency-resolved image
URL: http://jjap.ipap.jp/link?JJAP/44/1771/
DOI: 10.1143/JJAP.44.1771

References | Citing Articles (4)

1. B. B. Hu and M. C Nuss: Opt. Lett. 20 (1995) 1716.
2. M. C. Beard, G. M. Turner and C. A. Schmuttenmaer: Phys. Med. Biol. 47 (2002) 3841.
3. K. Kawase, Y. Ogawa, Y. Watanabe and H. Inoue: Opt. Express 11 (2003) 2549.
4. M. Herrmann, M. Tani and K. Sakai: Jpn. J. Appl. Phys. 39 (2000) 6254[IPAP].
5. Q. Wu, T. D. Hewitt and X.-C. Zhang: Appl. Phys. Lett. 69 (1996) 1026[AIP Scitation].
6. S.-G. Park, A. M. Weiner, M. R. Melloch, C. W. Siders, J. L. W. Siders and A. J. Taylor: IEEE J. Quantum Electron. 35 (1999) 1257[CrossRef].
7. H. Yoneda, K. Tokuyama, K. Ueda, H. Yamamoto and K. Baba: Appl. Opt. 40 (2001) 6733.
8. K. Reimann, R. P. Smith, A. M. Weiner, T. Elsaesser and M. Woerner: Opt. Lett. 28 (2003) 471.
9. G. L. Carr, M. C. Martin, W. R. McKinney, K. Jordan, G. R. Neil and G. P. Williams: Nature 420 (2002) 153[CrossRef].
10. C. Raman, C. W. S. Conover, C. I. Sukenik and P. H. Bucksbaum: Phys. Rev. Lett. 76 (1996) 2436[APS].
11. R. Rungsawang, K. Ohta, K. Tukamoto and T. Hattori: J. Phys. D 36 (2003) 229[IoP STACKS].
12. M. Usami, T. Iwamoto, R. Fukasawa, M. Tani, M. Watanabe and K. Sakai: Phys. Med. Biol. 47 (2002) 3749.
13. F. Miyamaru, T. Yonera, M. Tani and M. Hangyo: Jpn. J. Appl. Phys. 43 (2004) L489[IPAP].
14. R. Rungsawasng, A. Mochiduki, S. Ookuma and T. Hattori: Jpn. J. Appl. Phys. 44 (2005) L288[IPAP].
15. Z. Jiang, F. G. Sun, Q. Chen and X.-C. Zhang: Appl. Phys. Lett. 74 (1999) 1191[AIP Scitation].
16. T. Hattori, K. Ohta, R. Rungsawang and K. Tukamoto: J. Phys. D 37 (2004) 770[IoP STACKS].
17. G. L. Eesley, M. D. Levenson and W. M. Tolles: IEEE J. Quantum Electron. 14 (1978) 45[CrossRef].
18. T. Hattori, R. Rungsawang, K. Ohta and K. Tukamoto: Jpn. J. Appl. Phys. 41 (2002) 5198[IPAP].
19. M. T. Reiten, S. A. Harmon and R. A. Cheville: J. Opt. Soc. Am. B 20 (2003) 2215.