Abstract

The transmission spectra of two CO isotopic variants, i.e., CO12 and CO13, are measured with a recently developed widely tunable THz source. The pure rotational transition lines of J=67, 1011, 1112, 1213, and 1314 have been identified in the spectra. The transition frequencies and the rotational constant of each CO isotopic variant are also presented. Experimental results indicate that the difference of the rotational constants between the two isotopic variants can be used to reliably differentiate CO12 and CO13. Compared with the measurements made by using a Fourier transform infrared spectrometer, our tunable THz source has produced approximately the same accuracies for measuring transition frequencies or determining rotational constants.

© 2007 Optical Society of America

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References

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  1. W. Shi and Y. J. Ding, "Monochromatic and high-power THz source tunable in the range of 2.7-38.4 μm and 58.2-3540 μm for variety of potential applications," Appl. Phys. Lett. 84, 1635-1637 (2004).
    [CrossRef]
  2. P. Atkins and R. Friedman, Molecular Quantum Mechanics, 4th ed. (Oxford U. Press, 2005).
  3. T. D. Varberg and K. M. Evenson, "Accurate Far-Infrared rotational frequencies of carbon monoxide," Astrophys. J. 385, 763-765 (1992).
    [CrossRef]
  4. L. R. Zink, P. De Natale, F. S. Pavone, M. Prevedelli, K. M. Evenson, and M. Inguscio, "Rotational far infrared spectrum of 13CO," J. Mol. Spectrosc. 143, 304-310 (1990).
    [CrossRef]
  5. I. G. Nolt, J. V. Radostitz, G. Dilonardo, K. M. Evenson, D. A. Jennings, K. R. Leopold, M. D. Vanek, L. R. Zink, A. Hinz, and K. V. Chance, "Accurate rotational constants of CO, HCl, and HF: spectral standards for the 0.3 to 6 THz (10 to 200 cm−1) region," J. Mol. Spectrosc. 125, 274-287 (1987).
    [CrossRef]
  6. G. Winnewisser, S. P. Belov, Th. Klaus, and R. Schieder, "Sub-Doppler measurements on the rotational transitions of carbon monoxide," J. Mol. Spectrosc. 184, 468-472 (1997).
    [CrossRef]
  7. G. Klapper, F. Lewen, R. Gendriesch, S. P. Belov, and G. Winnewisser, "Sub-Doppler measurements of rotational spectrum of 13C16O," J. Mol. Spectrosc. 201, 124-127 (2000).
    [CrossRef]
  8. J. W. Fleming and John Chamberlain, "High resolution far infrared Fourier transform spectroscopy using Michelson interferometers with and without collimation," Infrared Phys. 14, 277-292 (1974).
    [CrossRef]
  9. S. Matsuura, M. Tani, H. Abe, K. Sakai, H. Ozeki, and S. Saito, "High-resolution terahertz spectroscopy by a compact radiation source based on photomixing with diode lasers in a photoconducting antenna," J. Mol. Spectrosc. 187, 97-101 (1998).
    [CrossRef] [PubMed]
  10. G. A. Blake, K. B. Laughlin, R. C. Cohen, K. L. Busarow, D.-H. Gwo, C. A. Schmuttenmaer, D. W. Steyert, and R. J. Saykally, "Tunable far-infrared laser spectrometers," Rev. Sci. Instrum. 62, 1693-1700 (1991).
    [CrossRef]
  11. Y. J. Ding and W. Shi, "Phase-matched frequency mixing of THz and near-infrared laser pulses in a ZnGeP2 crystal," Opt. Express 14, 8311-8316 (2006).
    [CrossRef] [PubMed]
  12. J.-M. Flaud, C. Camy-Peyret, and R. A. Toth, Water Vapor Parameters From Microwave to Medium Infrared (Pergamon, 1981).
  13. H. Harde, R. A. Cheville, and D. Grischkowsky, "Terahertz studies of collision-broadended rotational lines," J. Phys. Chem. A 101, 3646-3660 (1997).
    [CrossRef]

2006 (1)

2004 (1)

W. Shi and Y. J. Ding, "Monochromatic and high-power THz source tunable in the range of 2.7-38.4 μm and 58.2-3540 μm for variety of potential applications," Appl. Phys. Lett. 84, 1635-1637 (2004).
[CrossRef]

2000 (1)

G. Klapper, F. Lewen, R. Gendriesch, S. P. Belov, and G. Winnewisser, "Sub-Doppler measurements of rotational spectrum of 13C16O," J. Mol. Spectrosc. 201, 124-127 (2000).
[CrossRef]

1998 (1)

S. Matsuura, M. Tani, H. Abe, K. Sakai, H. Ozeki, and S. Saito, "High-resolution terahertz spectroscopy by a compact radiation source based on photomixing with diode lasers in a photoconducting antenna," J. Mol. Spectrosc. 187, 97-101 (1998).
[CrossRef] [PubMed]

1997 (2)

G. Winnewisser, S. P. Belov, Th. Klaus, and R. Schieder, "Sub-Doppler measurements on the rotational transitions of carbon monoxide," J. Mol. Spectrosc. 184, 468-472 (1997).
[CrossRef]

H. Harde, R. A. Cheville, and D. Grischkowsky, "Terahertz studies of collision-broadended rotational lines," J. Phys. Chem. A 101, 3646-3660 (1997).
[CrossRef]

1992 (1)

T. D. Varberg and K. M. Evenson, "Accurate Far-Infrared rotational frequencies of carbon monoxide," Astrophys. J. 385, 763-765 (1992).
[CrossRef]

1991 (1)

G. A. Blake, K. B. Laughlin, R. C. Cohen, K. L. Busarow, D.-H. Gwo, C. A. Schmuttenmaer, D. W. Steyert, and R. J. Saykally, "Tunable far-infrared laser spectrometers," Rev. Sci. Instrum. 62, 1693-1700 (1991).
[CrossRef]

1990 (1)

L. R. Zink, P. De Natale, F. S. Pavone, M. Prevedelli, K. M. Evenson, and M. Inguscio, "Rotational far infrared spectrum of 13CO," J. Mol. Spectrosc. 143, 304-310 (1990).
[CrossRef]

1987 (1)

I. G. Nolt, J. V. Radostitz, G. Dilonardo, K. M. Evenson, D. A. Jennings, K. R. Leopold, M. D. Vanek, L. R. Zink, A. Hinz, and K. V. Chance, "Accurate rotational constants of CO, HCl, and HF: spectral standards for the 0.3 to 6 THz (10 to 200 cm−1) region," J. Mol. Spectrosc. 125, 274-287 (1987).
[CrossRef]

1974 (1)

J. W. Fleming and John Chamberlain, "High resolution far infrared Fourier transform spectroscopy using Michelson interferometers with and without collimation," Infrared Phys. 14, 277-292 (1974).
[CrossRef]

Abe, H.

S. Matsuura, M. Tani, H. Abe, K. Sakai, H. Ozeki, and S. Saito, "High-resolution terahertz spectroscopy by a compact radiation source based on photomixing with diode lasers in a photoconducting antenna," J. Mol. Spectrosc. 187, 97-101 (1998).
[CrossRef] [PubMed]

Atkins, P.

P. Atkins and R. Friedman, Molecular Quantum Mechanics, 4th ed. (Oxford U. Press, 2005).

Belov, S. P.

G. Klapper, F. Lewen, R. Gendriesch, S. P. Belov, and G. Winnewisser, "Sub-Doppler measurements of rotational spectrum of 13C16O," J. Mol. Spectrosc. 201, 124-127 (2000).
[CrossRef]

G. Winnewisser, S. P. Belov, Th. Klaus, and R. Schieder, "Sub-Doppler measurements on the rotational transitions of carbon monoxide," J. Mol. Spectrosc. 184, 468-472 (1997).
[CrossRef]

Blake, G. A.

G. A. Blake, K. B. Laughlin, R. C. Cohen, K. L. Busarow, D.-H. Gwo, C. A. Schmuttenmaer, D. W. Steyert, and R. J. Saykally, "Tunable far-infrared laser spectrometers," Rev. Sci. Instrum. 62, 1693-1700 (1991).
[CrossRef]

Busarow, K. L.

G. A. Blake, K. B. Laughlin, R. C. Cohen, K. L. Busarow, D.-H. Gwo, C. A. Schmuttenmaer, D. W. Steyert, and R. J. Saykally, "Tunable far-infrared laser spectrometers," Rev. Sci. Instrum. 62, 1693-1700 (1991).
[CrossRef]

Camy-Peyret, C.

J.-M. Flaud, C. Camy-Peyret, and R. A. Toth, Water Vapor Parameters From Microwave to Medium Infrared (Pergamon, 1981).

Chamberlain, John

J. W. Fleming and John Chamberlain, "High resolution far infrared Fourier transform spectroscopy using Michelson interferometers with and without collimation," Infrared Phys. 14, 277-292 (1974).
[CrossRef]

Chance, K. V.

I. G. Nolt, J. V. Radostitz, G. Dilonardo, K. M. Evenson, D. A. Jennings, K. R. Leopold, M. D. Vanek, L. R. Zink, A. Hinz, and K. V. Chance, "Accurate rotational constants of CO, HCl, and HF: spectral standards for the 0.3 to 6 THz (10 to 200 cm−1) region," J. Mol. Spectrosc. 125, 274-287 (1987).
[CrossRef]

Cheville, R. A.

H. Harde, R. A. Cheville, and D. Grischkowsky, "Terahertz studies of collision-broadended rotational lines," J. Phys. Chem. A 101, 3646-3660 (1997).
[CrossRef]

Cohen, R. C.

G. A. Blake, K. B. Laughlin, R. C. Cohen, K. L. Busarow, D.-H. Gwo, C. A. Schmuttenmaer, D. W. Steyert, and R. J. Saykally, "Tunable far-infrared laser spectrometers," Rev. Sci. Instrum. 62, 1693-1700 (1991).
[CrossRef]

De Natale, P.

L. R. Zink, P. De Natale, F. S. Pavone, M. Prevedelli, K. M. Evenson, and M. Inguscio, "Rotational far infrared spectrum of 13CO," J. Mol. Spectrosc. 143, 304-310 (1990).
[CrossRef]

Dilonardo, G.

I. G. Nolt, J. V. Radostitz, G. Dilonardo, K. M. Evenson, D. A. Jennings, K. R. Leopold, M. D. Vanek, L. R. Zink, A. Hinz, and K. V. Chance, "Accurate rotational constants of CO, HCl, and HF: spectral standards for the 0.3 to 6 THz (10 to 200 cm−1) region," J. Mol. Spectrosc. 125, 274-287 (1987).
[CrossRef]

Ding, Y. J.

Y. J. Ding and W. Shi, "Phase-matched frequency mixing of THz and near-infrared laser pulses in a ZnGeP2 crystal," Opt. Express 14, 8311-8316 (2006).
[CrossRef] [PubMed]

W. Shi and Y. J. Ding, "Monochromatic and high-power THz source tunable in the range of 2.7-38.4 μm and 58.2-3540 μm for variety of potential applications," Appl. Phys. Lett. 84, 1635-1637 (2004).
[CrossRef]

Evenson, K. M.

T. D. Varberg and K. M. Evenson, "Accurate Far-Infrared rotational frequencies of carbon monoxide," Astrophys. J. 385, 763-765 (1992).
[CrossRef]

L. R. Zink, P. De Natale, F. S. Pavone, M. Prevedelli, K. M. Evenson, and M. Inguscio, "Rotational far infrared spectrum of 13CO," J. Mol. Spectrosc. 143, 304-310 (1990).
[CrossRef]

I. G. Nolt, J. V. Radostitz, G. Dilonardo, K. M. Evenson, D. A. Jennings, K. R. Leopold, M. D. Vanek, L. R. Zink, A. Hinz, and K. V. Chance, "Accurate rotational constants of CO, HCl, and HF: spectral standards for the 0.3 to 6 THz (10 to 200 cm−1) region," J. Mol. Spectrosc. 125, 274-287 (1987).
[CrossRef]

Flaud, J.-M.

J.-M. Flaud, C. Camy-Peyret, and R. A. Toth, Water Vapor Parameters From Microwave to Medium Infrared (Pergamon, 1981).

Fleming, J. W.

J. W. Fleming and John Chamberlain, "High resolution far infrared Fourier transform spectroscopy using Michelson interferometers with and without collimation," Infrared Phys. 14, 277-292 (1974).
[CrossRef]

Friedman, R.

P. Atkins and R. Friedman, Molecular Quantum Mechanics, 4th ed. (Oxford U. Press, 2005).

Gendriesch, R.

G. Klapper, F. Lewen, R. Gendriesch, S. P. Belov, and G. Winnewisser, "Sub-Doppler measurements of rotational spectrum of 13C16O," J. Mol. Spectrosc. 201, 124-127 (2000).
[CrossRef]

Grischkowsky, D.

H. Harde, R. A. Cheville, and D. Grischkowsky, "Terahertz studies of collision-broadended rotational lines," J. Phys. Chem. A 101, 3646-3660 (1997).
[CrossRef]

Gwo, D.-H.

G. A. Blake, K. B. Laughlin, R. C. Cohen, K. L. Busarow, D.-H. Gwo, C. A. Schmuttenmaer, D. W. Steyert, and R. J. Saykally, "Tunable far-infrared laser spectrometers," Rev. Sci. Instrum. 62, 1693-1700 (1991).
[CrossRef]

Harde, H.

H. Harde, R. A. Cheville, and D. Grischkowsky, "Terahertz studies of collision-broadended rotational lines," J. Phys. Chem. A 101, 3646-3660 (1997).
[CrossRef]

Hinz, A.

I. G. Nolt, J. V. Radostitz, G. Dilonardo, K. M. Evenson, D. A. Jennings, K. R. Leopold, M. D. Vanek, L. R. Zink, A. Hinz, and K. V. Chance, "Accurate rotational constants of CO, HCl, and HF: spectral standards for the 0.3 to 6 THz (10 to 200 cm−1) region," J. Mol. Spectrosc. 125, 274-287 (1987).
[CrossRef]

Inguscio, M.

L. R. Zink, P. De Natale, F. S. Pavone, M. Prevedelli, K. M. Evenson, and M. Inguscio, "Rotational far infrared spectrum of 13CO," J. Mol. Spectrosc. 143, 304-310 (1990).
[CrossRef]

Jennings, D. A.

I. G. Nolt, J. V. Radostitz, G. Dilonardo, K. M. Evenson, D. A. Jennings, K. R. Leopold, M. D. Vanek, L. R. Zink, A. Hinz, and K. V. Chance, "Accurate rotational constants of CO, HCl, and HF: spectral standards for the 0.3 to 6 THz (10 to 200 cm−1) region," J. Mol. Spectrosc. 125, 274-287 (1987).
[CrossRef]

Klapper, G.

G. Klapper, F. Lewen, R. Gendriesch, S. P. Belov, and G. Winnewisser, "Sub-Doppler measurements of rotational spectrum of 13C16O," J. Mol. Spectrosc. 201, 124-127 (2000).
[CrossRef]

Klaus, Th.

G. Winnewisser, S. P. Belov, Th. Klaus, and R. Schieder, "Sub-Doppler measurements on the rotational transitions of carbon monoxide," J. Mol. Spectrosc. 184, 468-472 (1997).
[CrossRef]

Laughlin, K. B.

G. A. Blake, K. B. Laughlin, R. C. Cohen, K. L. Busarow, D.-H. Gwo, C. A. Schmuttenmaer, D. W. Steyert, and R. J. Saykally, "Tunable far-infrared laser spectrometers," Rev. Sci. Instrum. 62, 1693-1700 (1991).
[CrossRef]

Leopold, K. R.

I. G. Nolt, J. V. Radostitz, G. Dilonardo, K. M. Evenson, D. A. Jennings, K. R. Leopold, M. D. Vanek, L. R. Zink, A. Hinz, and K. V. Chance, "Accurate rotational constants of CO, HCl, and HF: spectral standards for the 0.3 to 6 THz (10 to 200 cm−1) region," J. Mol. Spectrosc. 125, 274-287 (1987).
[CrossRef]

Lewen, F.

G. Klapper, F. Lewen, R. Gendriesch, S. P. Belov, and G. Winnewisser, "Sub-Doppler measurements of rotational spectrum of 13C16O," J. Mol. Spectrosc. 201, 124-127 (2000).
[CrossRef]

Matsuura, S.

S. Matsuura, M. Tani, H. Abe, K. Sakai, H. Ozeki, and S. Saito, "High-resolution terahertz spectroscopy by a compact radiation source based on photomixing with diode lasers in a photoconducting antenna," J. Mol. Spectrosc. 187, 97-101 (1998).
[CrossRef] [PubMed]

Nolt, I. G.

I. G. Nolt, J. V. Radostitz, G. Dilonardo, K. M. Evenson, D. A. Jennings, K. R. Leopold, M. D. Vanek, L. R. Zink, A. Hinz, and K. V. Chance, "Accurate rotational constants of CO, HCl, and HF: spectral standards for the 0.3 to 6 THz (10 to 200 cm−1) region," J. Mol. Spectrosc. 125, 274-287 (1987).
[CrossRef]

Ozeki, H.

S. Matsuura, M. Tani, H. Abe, K. Sakai, H. Ozeki, and S. Saito, "High-resolution terahertz spectroscopy by a compact radiation source based on photomixing with diode lasers in a photoconducting antenna," J. Mol. Spectrosc. 187, 97-101 (1998).
[CrossRef] [PubMed]

Pavone, F. S.

L. R. Zink, P. De Natale, F. S. Pavone, M. Prevedelli, K. M. Evenson, and M. Inguscio, "Rotational far infrared spectrum of 13CO," J. Mol. Spectrosc. 143, 304-310 (1990).
[CrossRef]

Prevedelli, M.

L. R. Zink, P. De Natale, F. S. Pavone, M. Prevedelli, K. M. Evenson, and M. Inguscio, "Rotational far infrared spectrum of 13CO," J. Mol. Spectrosc. 143, 304-310 (1990).
[CrossRef]

Radostitz, J. V.

I. G. Nolt, J. V. Radostitz, G. Dilonardo, K. M. Evenson, D. A. Jennings, K. R. Leopold, M. D. Vanek, L. R. Zink, A. Hinz, and K. V. Chance, "Accurate rotational constants of CO, HCl, and HF: spectral standards for the 0.3 to 6 THz (10 to 200 cm−1) region," J. Mol. Spectrosc. 125, 274-287 (1987).
[CrossRef]

Saito, S.

S. Matsuura, M. Tani, H. Abe, K. Sakai, H. Ozeki, and S. Saito, "High-resolution terahertz spectroscopy by a compact radiation source based on photomixing with diode lasers in a photoconducting antenna," J. Mol. Spectrosc. 187, 97-101 (1998).
[CrossRef] [PubMed]

Sakai, K.

S. Matsuura, M. Tani, H. Abe, K. Sakai, H. Ozeki, and S. Saito, "High-resolution terahertz spectroscopy by a compact radiation source based on photomixing with diode lasers in a photoconducting antenna," J. Mol. Spectrosc. 187, 97-101 (1998).
[CrossRef] [PubMed]

Saykally, R. J.

G. A. Blake, K. B. Laughlin, R. C. Cohen, K. L. Busarow, D.-H. Gwo, C. A. Schmuttenmaer, D. W. Steyert, and R. J. Saykally, "Tunable far-infrared laser spectrometers," Rev. Sci. Instrum. 62, 1693-1700 (1991).
[CrossRef]

Schieder, R.

G. Winnewisser, S. P. Belov, Th. Klaus, and R. Schieder, "Sub-Doppler measurements on the rotational transitions of carbon monoxide," J. Mol. Spectrosc. 184, 468-472 (1997).
[CrossRef]

Schmuttenmaer, C. A.

G. A. Blake, K. B. Laughlin, R. C. Cohen, K. L. Busarow, D.-H. Gwo, C. A. Schmuttenmaer, D. W. Steyert, and R. J. Saykally, "Tunable far-infrared laser spectrometers," Rev. Sci. Instrum. 62, 1693-1700 (1991).
[CrossRef]

Shi, W.

Y. J. Ding and W. Shi, "Phase-matched frequency mixing of THz and near-infrared laser pulses in a ZnGeP2 crystal," Opt. Express 14, 8311-8316 (2006).
[CrossRef] [PubMed]

W. Shi and Y. J. Ding, "Monochromatic and high-power THz source tunable in the range of 2.7-38.4 μm and 58.2-3540 μm for variety of potential applications," Appl. Phys. Lett. 84, 1635-1637 (2004).
[CrossRef]

Steyert, D. W.

G. A. Blake, K. B. Laughlin, R. C. Cohen, K. L. Busarow, D.-H. Gwo, C. A. Schmuttenmaer, D. W. Steyert, and R. J. Saykally, "Tunable far-infrared laser spectrometers," Rev. Sci. Instrum. 62, 1693-1700 (1991).
[CrossRef]

Tani, M.

S. Matsuura, M. Tani, H. Abe, K. Sakai, H. Ozeki, and S. Saito, "High-resolution terahertz spectroscopy by a compact radiation source based on photomixing with diode lasers in a photoconducting antenna," J. Mol. Spectrosc. 187, 97-101 (1998).
[CrossRef] [PubMed]

Toth, R. A.

J.-M. Flaud, C. Camy-Peyret, and R. A. Toth, Water Vapor Parameters From Microwave to Medium Infrared (Pergamon, 1981).

Vanek, M. D.

I. G. Nolt, J. V. Radostitz, G. Dilonardo, K. M. Evenson, D. A. Jennings, K. R. Leopold, M. D. Vanek, L. R. Zink, A. Hinz, and K. V. Chance, "Accurate rotational constants of CO, HCl, and HF: spectral standards for the 0.3 to 6 THz (10 to 200 cm−1) region," J. Mol. Spectrosc. 125, 274-287 (1987).
[CrossRef]

Varberg, T. D.

T. D. Varberg and K. M. Evenson, "Accurate Far-Infrared rotational frequencies of carbon monoxide," Astrophys. J. 385, 763-765 (1992).
[CrossRef]

Winnewisser, G.

G. Klapper, F. Lewen, R. Gendriesch, S. P. Belov, and G. Winnewisser, "Sub-Doppler measurements of rotational spectrum of 13C16O," J. Mol. Spectrosc. 201, 124-127 (2000).
[CrossRef]

G. Winnewisser, S. P. Belov, Th. Klaus, and R. Schieder, "Sub-Doppler measurements on the rotational transitions of carbon monoxide," J. Mol. Spectrosc. 184, 468-472 (1997).
[CrossRef]

Zink, L. R.

L. R. Zink, P. De Natale, F. S. Pavone, M. Prevedelli, K. M. Evenson, and M. Inguscio, "Rotational far infrared spectrum of 13CO," J. Mol. Spectrosc. 143, 304-310 (1990).
[CrossRef]

I. G. Nolt, J. V. Radostitz, G. Dilonardo, K. M. Evenson, D. A. Jennings, K. R. Leopold, M. D. Vanek, L. R. Zink, A. Hinz, and K. V. Chance, "Accurate rotational constants of CO, HCl, and HF: spectral standards for the 0.3 to 6 THz (10 to 200 cm−1) region," J. Mol. Spectrosc. 125, 274-287 (1987).
[CrossRef]

Appl. Phys. Lett. (1)

W. Shi and Y. J. Ding, "Monochromatic and high-power THz source tunable in the range of 2.7-38.4 μm and 58.2-3540 μm for variety of potential applications," Appl. Phys. Lett. 84, 1635-1637 (2004).
[CrossRef]

Astrophys. J. (1)

T. D. Varberg and K. M. Evenson, "Accurate Far-Infrared rotational frequencies of carbon monoxide," Astrophys. J. 385, 763-765 (1992).
[CrossRef]

Infrared Phys. (1)

J. W. Fleming and John Chamberlain, "High resolution far infrared Fourier transform spectroscopy using Michelson interferometers with and without collimation," Infrared Phys. 14, 277-292 (1974).
[CrossRef]

J. Mol. Spectrosc. (5)

S. Matsuura, M. Tani, H. Abe, K. Sakai, H. Ozeki, and S. Saito, "High-resolution terahertz spectroscopy by a compact radiation source based on photomixing with diode lasers in a photoconducting antenna," J. Mol. Spectrosc. 187, 97-101 (1998).
[CrossRef] [PubMed]

L. R. Zink, P. De Natale, F. S. Pavone, M. Prevedelli, K. M. Evenson, and M. Inguscio, "Rotational far infrared spectrum of 13CO," J. Mol. Spectrosc. 143, 304-310 (1990).
[CrossRef]

I. G. Nolt, J. V. Radostitz, G. Dilonardo, K. M. Evenson, D. A. Jennings, K. R. Leopold, M. D. Vanek, L. R. Zink, A. Hinz, and K. V. Chance, "Accurate rotational constants of CO, HCl, and HF: spectral standards for the 0.3 to 6 THz (10 to 200 cm−1) region," J. Mol. Spectrosc. 125, 274-287 (1987).
[CrossRef]

G. Winnewisser, S. P. Belov, Th. Klaus, and R. Schieder, "Sub-Doppler measurements on the rotational transitions of carbon monoxide," J. Mol. Spectrosc. 184, 468-472 (1997).
[CrossRef]

G. Klapper, F. Lewen, R. Gendriesch, S. P. Belov, and G. Winnewisser, "Sub-Doppler measurements of rotational spectrum of 13C16O," J. Mol. Spectrosc. 201, 124-127 (2000).
[CrossRef]

J. Phys. Chem. A (1)

H. Harde, R. A. Cheville, and D. Grischkowsky, "Terahertz studies of collision-broadended rotational lines," J. Phys. Chem. A 101, 3646-3660 (1997).
[CrossRef]

Opt. Express (1)

Rev. Sci. Instrum. (1)

G. A. Blake, K. B. Laughlin, R. C. Cohen, K. L. Busarow, D.-H. Gwo, C. A. Schmuttenmaer, D. W. Steyert, and R. J. Saykally, "Tunable far-infrared laser spectrometers," Rev. Sci. Instrum. 62, 1693-1700 (1991).
[CrossRef]

Other (2)

J.-M. Flaud, C. Camy-Peyret, and R. A. Toth, Water Vapor Parameters From Microwave to Medium Infrared (Pergamon, 1981).

P. Atkins and R. Friedman, Molecular Quantum Mechanics, 4th ed. (Oxford U. Press, 2005).

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Figures (6)

Fig. 1
Fig. 1

(Color online) Transmission spectrum of a tunable THz radiation after passing through ambient air is measured before calibration of the THz source is made.

Fig. 2
Fig. 2

(Color online) Transmission spectra of CO 12 and CO 13 are measured by frequency tuning a THz source with (a) a coarse step size and (b) a fine step size.

Fig. 3
Fig. 3

(Color online) The 6 7 transition peaks for CO 12 and CO 13 are measured by using a tunable THz source.

Fig. 4
Fig. 4

(Color online) Transition frequency is measured versus rotational quantum number for CO 12 (open squares) and CO 13 (open circles), respectively, using a tunable THz source. Solid curves correspond to linear least-square fits to data.

Fig. 5
Fig. 5

(Color online) Transmission spectra are measured for CO 12 and CO 13 by using FTIR spectrometer for the transitions of (a) 10 11 , 11 12 , 12 13 , and 13 14 and (b) 6 7 .

Fig. 6
Fig. 6

(Color online) Transition frequency is measured versus rotational quantum number for CO 12 (open squares) and CO 13 (open circles), respectively, using a FTIR spectrometer. Solid curves correspond to linear least-square fits to data.

Tables (2)

Tables Icon

Table 1 Pure Rotational Transition Frequencies Measured by Tunable THz Source

Tables Icon

Table 2 Pure Rotational Transition Frequencies Measured by FTIR

Equations (1)

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υ = 2 B 0 ( J + 1 ) 4 D 0 ( J + 1 ) 3 ,

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