Abstract

A model of the electromagnetic radiation generated by the triggering of large-aperture biased photoconductors with ultrashort pulses is developed. In the far field, the radiated fluence and intensity, as well as waveforms of the radiated electric field, are presented as a function of optical excitation fluence.

© 1993 Optical Society of America

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References

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  1. J. T. Darrow, B. B. Hu, X.-C. Zhang, D. H. Auston, Opt. Lett. 15, 323 (1990).
    [CrossRef] [PubMed]
  2. J. T. Darrow, X.-C. Zhang, D. H. Auston, Appl. Phys. Lett. 58, 25 (1991).
    [CrossRef]
  3. P. K. Benicewicz, “Scaling of terahertz radiation from large-aperture biased photoconductors using 150-μJ, 815-nm femtosecond pulses,” Ph.D. dissertation (University of New Mexico, Albuquerque, N.M., 1993).
  4. J. T. Darrow, X.-C. Zhang, D. H. Auston, J. D. Morse, IEEE J. Quantum Electron. 28, 1607 (1992).
    [CrossRef]
  5. B. I. Greene, P. N. Saeta, D. R. Dykaar, S. Schmitt-Rink, S. L. Chuang, IEEE J. Quantum Electron. 28, 2302 (1992).
    [CrossRef]
  6. D. You, R. R. Jones, D. R. Dykaar, P. H. Bucksbaum, Opt. Lett. 18, 290 (1993).
    [CrossRef] [PubMed]
  7. M. C. Nuss, D. H. Auston, F. Capasso, Phys. Rev. Lett. 58, 2355 (1987).
    [CrossRef] [PubMed]
  8. P. N. Saeta, J. F. Federici, B. I. Greene, D. R. Dykaar, Appl. Phys. Lett. 60, 1477 (1992).
    [CrossRef]

1993 (1)

1992 (3)

J. T. Darrow, X.-C. Zhang, D. H. Auston, J. D. Morse, IEEE J. Quantum Electron. 28, 1607 (1992).
[CrossRef]

B. I. Greene, P. N. Saeta, D. R. Dykaar, S. Schmitt-Rink, S. L. Chuang, IEEE J. Quantum Electron. 28, 2302 (1992).
[CrossRef]

P. N. Saeta, J. F. Federici, B. I. Greene, D. R. Dykaar, Appl. Phys. Lett. 60, 1477 (1992).
[CrossRef]

1991 (1)

J. T. Darrow, X.-C. Zhang, D. H. Auston, Appl. Phys. Lett. 58, 25 (1991).
[CrossRef]

1990 (1)

1987 (1)

M. C. Nuss, D. H. Auston, F. Capasso, Phys. Rev. Lett. 58, 2355 (1987).
[CrossRef] [PubMed]

Auston, D. H.

J. T. Darrow, X.-C. Zhang, D. H. Auston, J. D. Morse, IEEE J. Quantum Electron. 28, 1607 (1992).
[CrossRef]

J. T. Darrow, X.-C. Zhang, D. H. Auston, Appl. Phys. Lett. 58, 25 (1991).
[CrossRef]

J. T. Darrow, B. B. Hu, X.-C. Zhang, D. H. Auston, Opt. Lett. 15, 323 (1990).
[CrossRef] [PubMed]

M. C. Nuss, D. H. Auston, F. Capasso, Phys. Rev. Lett. 58, 2355 (1987).
[CrossRef] [PubMed]

Benicewicz, P. K.

P. K. Benicewicz, “Scaling of terahertz radiation from large-aperture biased photoconductors using 150-μJ, 815-nm femtosecond pulses,” Ph.D. dissertation (University of New Mexico, Albuquerque, N.M., 1993).

Bucksbaum, P. H.

Capasso, F.

M. C. Nuss, D. H. Auston, F. Capasso, Phys. Rev. Lett. 58, 2355 (1987).
[CrossRef] [PubMed]

Chuang, S. L.

B. I. Greene, P. N. Saeta, D. R. Dykaar, S. Schmitt-Rink, S. L. Chuang, IEEE J. Quantum Electron. 28, 2302 (1992).
[CrossRef]

Darrow, J. T.

J. T. Darrow, X.-C. Zhang, D. H. Auston, J. D. Morse, IEEE J. Quantum Electron. 28, 1607 (1992).
[CrossRef]

J. T. Darrow, X.-C. Zhang, D. H. Auston, Appl. Phys. Lett. 58, 25 (1991).
[CrossRef]

J. T. Darrow, B. B. Hu, X.-C. Zhang, D. H. Auston, Opt. Lett. 15, 323 (1990).
[CrossRef] [PubMed]

Dykaar, D. R.

D. You, R. R. Jones, D. R. Dykaar, P. H. Bucksbaum, Opt. Lett. 18, 290 (1993).
[CrossRef] [PubMed]

P. N. Saeta, J. F. Federici, B. I. Greene, D. R. Dykaar, Appl. Phys. Lett. 60, 1477 (1992).
[CrossRef]

B. I. Greene, P. N. Saeta, D. R. Dykaar, S. Schmitt-Rink, S. L. Chuang, IEEE J. Quantum Electron. 28, 2302 (1992).
[CrossRef]

Federici, J. F.

P. N. Saeta, J. F. Federici, B. I. Greene, D. R. Dykaar, Appl. Phys. Lett. 60, 1477 (1992).
[CrossRef]

Greene, B. I.

P. N. Saeta, J. F. Federici, B. I. Greene, D. R. Dykaar, Appl. Phys. Lett. 60, 1477 (1992).
[CrossRef]

B. I. Greene, P. N. Saeta, D. R. Dykaar, S. Schmitt-Rink, S. L. Chuang, IEEE J. Quantum Electron. 28, 2302 (1992).
[CrossRef]

Hu, B. B.

Jones, R. R.

Morse, J. D.

J. T. Darrow, X.-C. Zhang, D. H. Auston, J. D. Morse, IEEE J. Quantum Electron. 28, 1607 (1992).
[CrossRef]

Nuss, M. C.

M. C. Nuss, D. H. Auston, F. Capasso, Phys. Rev. Lett. 58, 2355 (1987).
[CrossRef] [PubMed]

Saeta, P. N.

P. N. Saeta, J. F. Federici, B. I. Greene, D. R. Dykaar, Appl. Phys. Lett. 60, 1477 (1992).
[CrossRef]

B. I. Greene, P. N. Saeta, D. R. Dykaar, S. Schmitt-Rink, S. L. Chuang, IEEE J. Quantum Electron. 28, 2302 (1992).
[CrossRef]

Schmitt-Rink, S.

B. I. Greene, P. N. Saeta, D. R. Dykaar, S. Schmitt-Rink, S. L. Chuang, IEEE J. Quantum Electron. 28, 2302 (1992).
[CrossRef]

You, D.

Zhang, X.-C.

J. T. Darrow, X.-C. Zhang, D. H. Auston, J. D. Morse, IEEE J. Quantum Electron. 28, 1607 (1992).
[CrossRef]

J. T. Darrow, X.-C. Zhang, D. H. Auston, Appl. Phys. Lett. 58, 25 (1991).
[CrossRef]

J. T. Darrow, B. B. Hu, X.-C. Zhang, D. H. Auston, Opt. Lett. 15, 323 (1990).
[CrossRef] [PubMed]

Appl. Phys. Lett. (2)

J. T. Darrow, X.-C. Zhang, D. H. Auston, Appl. Phys. Lett. 58, 25 (1991).
[CrossRef]

P. N. Saeta, J. F. Federici, B. I. Greene, D. R. Dykaar, Appl. Phys. Lett. 60, 1477 (1992).
[CrossRef]

IEEE J. Quantum Electron. (2)

J. T. Darrow, X.-C. Zhang, D. H. Auston, J. D. Morse, IEEE J. Quantum Electron. 28, 1607 (1992).
[CrossRef]

B. I. Greene, P. N. Saeta, D. R. Dykaar, S. Schmitt-Rink, S. L. Chuang, IEEE J. Quantum Electron. 28, 2302 (1992).
[CrossRef]

Opt. Lett. (2)

Phys. Rev. Lett. (1)

M. C. Nuss, D. H. Auston, F. Capasso, Phys. Rev. Lett. 58, 2355 (1987).
[CrossRef] [PubMed]

Other (1)

P. K. Benicewicz, “Scaling of terahertz radiation from large-aperture biased photoconductors using 150-μJ, 815-nm femtosecond pulses,” Ph.D. dissertation (University of New Mexico, Albuquerque, N.M., 1993).

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Figures (4)

Fig. 1
Fig. 1

Waveforms for the radiated electric field Er(T) versus T for values of S = 0.1, 0.5, 1, 10, and 100.

Fig. 2
Fig. 2

(a) FWHM of Er(T) and Er,peak versus S. (b) Radiated fluence Fr, intensity Ir, and pulse width τr versus S.

Fig. 3
Fig. 3

Er,peak versus F for excitation in GaAs with the use of the mobility given in Eq. (8). For curves a, b, and c, B = 0 and the excitation wavelengths λ are 810, 660, and 580 nm. For curves d, e, f, and g, λ = 810, 700, 660, and 580 nm, respectively, and the nonzero values of B given in the text are used in the calculation.

Fig. 4
Fig. 4

(a) Er(T) versus T for excitation at 580 nm (a) with F = 0.0037 mJ/cm2 and (b) with F = 3.7 mJ/cm2 for B = 0 and B = 1.

Equations (8)

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E r ( t ) = - A 4 π z 0 c 2 d d t J s ( t ) ,
J s ( t ) = σ s E b ( σ s η 0 1 + n + 1 ) ,
E r ( t ) = - A E b 4 π 0 c 2 z d σ s d t ( 1 + σ s η 0 1 + n ) 2 .
σ s ( t ) = e ( 1 - R ) h ν - t I opt ( t ) μ ( t , t ) n ( t , t ) d t ,
I opt ( t ) = F π τ exp ( - t 2 / τ 2 ) ,
E r ( T ) = - C E b S exp ( - T 2 ) [ 1 + S - T exp ( - x 2 ) d x ] 2 ,
C = A n 2 π 0 c 2 η 0 τ z ,             F s = ( 1 + n ) h ν π e ( 1 - R ) μ i η 0 ,
μ ( t , t ) = μ f - ( μ f - μ i ) exp [ - ( t - t ) / τ μ ] 1 + B - t I opt ( x ) exp [ - ( t - x ) / τ c ] d x

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