The role of nonlinear optical absorption in narrowband difference-frequency terahertz-wave generation

Matteo Cherchi, Saverio Bivona, Alfonso C. Cino, Alessandro C. Busacca, Roberto L. Oliveri

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

We present a general analysis of the influence of nonlinear optical absorption on terahertz generation via optical-difference frequency generation when reaching for the quantum conversion efficiency limit. By casting the equations governing the process in a suitably normalized form, including either two-photon- or three- photon absorption terms, we have been able to plot universal charts for phase-matched optical-to-terahertz conversion for different values of the nonlinear absorption coefficients. We apply our analysis to some experi- ments reported to date in order to understand to what extent multiphoton absorption could have played a role and also to predict the maximum achievable conversion efficiency at higher peak pump intensities.
Original languageEnglish
Pages (from-to)222-227
Number of pages6
JournalJournal of the Optical Society of America B: Optical Physics
Volume27
Issue number2
DOIs
Publication statusPublished - 2010
MoE publication typeA1 Journal article-refereed

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wave generation
narrowband
optical absorption
multiphoton absorption
photons
charts
absorptivity
plots
pumps

Cite this

Cherchi, Matteo ; Bivona, Saverio ; Cino, Alfonso C. ; Busacca, Alessandro C. ; Oliveri, Roberto L. / The role of nonlinear optical absorption in narrowband difference-frequency terahertz-wave generation. In: Journal of the Optical Society of America B: Optical Physics. 2010 ; Vol. 27, No. 2. pp. 222-227.
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abstract = "We present a general analysis of the influence of nonlinear optical absorption on terahertz generation via optical-difference frequency generation when reaching for the quantum conversion efficiency limit. By casting the equations governing the process in a suitably normalized form, including either two-photon- or three- photon absorption terms, we have been able to plot universal charts for phase-matched optical-to-terahertz conversion for different values of the nonlinear absorption coefficients. We apply our analysis to some experi- ments reported to date in order to understand to what extent multiphoton absorption could have played a role and also to predict the maximum achievable conversion efficiency at higher peak pump intensities.",
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The role of nonlinear optical absorption in narrowband difference-frequency terahertz-wave generation. / Cherchi, Matteo; Bivona, Saverio; Cino, Alfonso C.; Busacca, Alessandro C.; Oliveri, Roberto L.

In: Journal of the Optical Society of America B: Optical Physics, Vol. 27, No. 2, 2010, p. 222-227.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Cherchi, Matteo

AU - Bivona, Saverio

AU - Cino, Alfonso C.

AU - Busacca, Alessandro C.

AU - Oliveri, Roberto L.

PY - 2010

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AB - We present a general analysis of the influence of nonlinear optical absorption on terahertz generation via optical-difference frequency generation when reaching for the quantum conversion efficiency limit. By casting the equations governing the process in a suitably normalized form, including either two-photon- or three- photon absorption terms, we have been able to plot universal charts for phase-matched optical-to-terahertz conversion for different values of the nonlinear absorption coefficients. We apply our analysis to some experi- ments reported to date in order to understand to what extent multiphoton absorption could have played a role and also to predict the maximum achievable conversion efficiency at higher peak pump intensities.

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