Contribution of second-harmonic generation to the creation of free carriers in CdTe single crystals

Petrovic, M. S.; Suchocki, A.; Powell, Richard C.; Cantwell, G.; Aldridge, J.

doi:10.1063/1.103148

Applied Physics Letters

1990

DOI: 10.1063/1.103148

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Contribution of second-harmonic generation to the creation of free carriers in CdTe single crystals

M. S. Petrovic

A. Suchocki

Richard C. Powell

et al.

Abstract: It is shown that cadmium telluride exhibits second-harmonic generation under 1064 nm ps pulse excitation despite strong absorption of the green light which is generated. The process of second-harmonic generation contributes to the creation of an electron-hole plasma in CdTe which affects the measured value of the two-photon absorption coefficient and other nonlinear properties of the material.

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Cited by 7 publications

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“…Angular dependence of the SHG conversion efficiency for CdTe single crystal of very good crystallographic and optical quality iS shown in Fig. la [7]. The fundamental infrared red was perpendicular to the (110) surface of the sample.…”

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confidence: 99%

Transmission Second Harmonic Generation in Cd_1-xMn_xTe at 1.064 µm

et al. 1995

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Second harmonic generation, created by nanosecond Nd : YAG laser pulses at 1.064 pm with relatively low intensity in Cd1-xMnxTe bulk crystals and thin layers was measured in transmission geometry. The effect practically occurs in a very thin surface layer of the material and it is used as a relatively straightforward method of layer quality characterization. It is shown that the angular dependence of the second harmonic generation intensity in thin layers of CdTe with good crystallographic (and optical) quality agrees very well with the theory in contrary to the samples with some distortions from the ideal structure which exhibits large distortions from the theory.PACS numbers: 42.65. Ky, 68.70.+w Recently, nonlinear properties of thin layers and quantum structures of various II-VI and III-V semiconductors attracted considerable attention due to possible application in a variety of fields. Relatively high electro-optic coefficient of these materials and relatively fast optical response make them attractive for devices used in optical communication, data processing, real time optical processing and optical limiting. Recent studies [1][2][3] show that cadmium manganeSe telluride exhibits strong nonlinear response in the visible and in the near-infrared. These materials may be of interest since it is possible to control its forbidden gap by the manganese content thus enhancing a nonlinear response due to band-to-band optical transitions.It has been recently shown that the second order nonlinear susceptibility coefficients for CdMnTe crystals are higher than these for CdTe [4] which makes this material even more attractive for applicationS.CdMnTe crystals were found to generate efficiently second harmonic in the infrared, excited by CO2 laser radiation at 10.6 µm. In this paper we show that CdMnTe crystals, grown by the Bridgman technique and molecular beam epitaxy (423)

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Transmission Second Harmonic Generation in Cd_1-xMn_xTe at 1.064 µm

et al. 1995

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Transient Energy Transfer by ps‐Laser‐Induced Free‐Carrier and Photorefractive Gratings in CdTe at 1 μm

Rückmann

Kornack

Kolenda

et al. 1992

Physica Status Solidi (b)

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Three-beam mixing is investigated in ps-transient grating experiments carried out on (1 LO) CdTe at 1 pm in the case of two-photon absorption (TPA). The coupling of three transient gratings via TPA results in an amplification of the free-carrier transient energy transfer (TET) from pump beams to the probe beam. The competition between TET and TPA as well as the TET influence on the diffraction versus intensity curve are investigated experimentally and are studied theoretically using a model including nonlinear absorption and mixed gratings. Furthermore, for the first time the contribution of the ps-photorefractive coupling to the probe-beam diffraction signal is observed investigating the orientational dependence of dirffaction kinetics.Bei Experimenten mit transienten Gittern im ps-Bereich an (1 10) CdTe bei 1 pm wird fur den Fall der Zwei-Photonen-Absorption (TPA) die Dreistrahl-Mischung untersucht. Die Kopplung von drei transienten Gittern uber TPA fiihrt zu einer Verstirkung des transienten Energietransfers (TET) freier Ladungstrlger vom Pumpstrahl zum MeBstrahl. Das Wechselspiel zwischen TET und TPA sowie der TET-EinfluD auf die Beugung als Funktion der Intensitat werden experimentell untersucht und theoretisch analysiert anhand eines Modells, das nichtlineare Absorption und gemischte Gitter einschlie8t. Weiterhin wird rum ersten Ma1 der Beitrag der photorefraktiven Kopplung im ps-Bereich zum Beugungssignal des Meastrahls bei Untersuchungen zur Orientierungsabhiingigkeit der Beugungskinetik ermittelt.

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Transmission second harmonic generation in CdTe at 1.064 ?m

et al. 1991

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Contribution of second-harmonic generation to the creation of free carriers in CdTe single crystals

Cited by 7 publications

References 23 publications

Transmission Second Harmonic Generation in Cd_1-xMn_xTe at 1.064 µm

Transmission Second Harmonic Generation in Cd_1-xMn_xTe at 1.064 µm

Transient Energy Transfer by ps‐Laser‐Induced Free‐Carrier and Photorefractive Gratings in CdTe at 1 μm

Transmission second harmonic generation in CdTe at 1.064 ?m

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Contribution of second-harmonic generation to the creation of free carriers in CdTe single crystals

Cited by 7 publications

References 23 publications

Transmission Second Harmonic Generation in Cd1-xMnxTe at 1.064 µm

Transmission Second Harmonic Generation in Cd1-xMnxTe at 1.064 µm

Transient Energy Transfer by ps‐Laser‐Induced Free‐Carrier and Photorefractive Gratings in CdTe at 1 μm

Transmission second harmonic generation in CdTe at 1.064 ?m

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Product

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Transmission Second Harmonic Generation in Cd_1-xMn_xTe at 1.064 µm

Transmission Second Harmonic Generation in Cd_1-xMn_xTe at 1.064 µm