Dependence of terahertz radiation on gap sizes of biased multi-energy arsenic-ion-implanted and semi-insulating GaAs antennas

Liu, Tze-An; Chou, Rone-Hwa; Pan, Ci‐Ling

doi:10.1007/s00340-008-3332-8

Cited by 3 publications

(2 citation statements)

References 21 publications

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“…The As + -implanted GaAs and O + -implanted GaAs PC antennas have breakdown electric field thresholds of 12.5 kV/cm and 14.1 kV/cm respectively, as compared to 3.3 kV/cm for semi-insulating GaAs PC antenna [24]. Thus, ion-implanted PC antennas benefit from high reachable bias fields and generate higher THz power in comparison with semi-insulating GaAs PC antenna [25]. The difference of the breakdown electric field between O + -implanted GaAs emitters and As + -implanted GaAs emitter should be the result of the compensation induced by oxygen impurity.…”

Section: Pc Antennas Made From Ion-implanted Gaas Materialsmentioning

confidence: 96%

THz Photoconductive Antennas Made From Ion-Bombarded Semiconductors

Mangeney

2011

J Infrared Milli Terahz Waves

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Section: Pc Antennas Made From Ion-implanted Gaas Materialsmentioning

confidence: 96%

THz Photoconductive Antennas Made From Ion-Bombarded Semiconductors

Mangeney

2011

J Infrared Milli Terahz Waves

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“…In addition, owing to the variety of experimental conditions (e.g. different sources of substrate materials), the experimental results from different group can not be compared fairly and sometimes even conflict with each other [3,4,5,6,7]. Alternatively, numerical simulation is an effective and powerful route, in which the involved parameter can be studied individually and explicitly.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of the emission properties of terahertz photoconductive antenna by finite-difference-time-domain method

Zhang

2014

Preprint

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The emission properties of terahertz(THz) photoconductive antenna (PCA) have been numerically studied by three-dimensional finite-difference-time-domain method based on the full-wave model. The dependence of the THz radiation on various parameters, such as laser power, bias voltage, substrate's material, pulse duration of the laser, beam spot's size, dimension of the antenna, were comprehensively simulated and analyzed. This work, on one hand, reveals the internal relationship between the THz radiation of a PCA and the involved parameters, so that one can have a better understanding of the PCA. On the other hand, it can inspire new PCA's design that aims at improved performance, such as high radiation power, enhanced optics-to-THz conversion efficiency, and broadband spectrum.

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Effects of pump pulse propagation and spatial distribution of bias fields on terahertz generation from photoconductive antennas

Chou

Yang

Pan

2013

Journal of Applied Physics

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Through theoretical analysis and numerical simulation, we show that bipolar terahertz pulses generated from photo-excited small-gap or mid-gap photoconductive (PC) antennas actually stem from a unique combination of spatially inhomogeneous bias field and propagation effects of pump pulses through the PC if the influence of fast carrier recombination on terahertz radiation is excluded. This finding provides new insights on the formation of bipolar terahertz pulses, instead of the traditional view based on the Drude-Lorentz model and the space-charge screening effect. We find large-aperture PC antennas always emit unipolar terahertz pulses rather than bipolar ones because the bias fields in this case can be considered homogeneous. We also show that the saturation of the peak amplitude of terahertz pulses at high pump fluence can be correctly predicted using our model without invoking space-charge screening.

show abstract

Dependence of terahertz radiation on gap sizes of biased multi-energy arsenic-ion-implanted and semi-insulating GaAs antennas

Cited by 3 publications

References 21 publications

THz Photoconductive Antennas Made From Ion-Bombarded Semiconductors

THz Photoconductive Antennas Made From Ion-Bombarded Semiconductors

Numerical analysis of the emission properties of terahertz photoconductive antenna by finite-difference-time-domain method

Effects of pump pulse propagation and spatial distribution of bias fields on terahertz generation from photoconductive antennas

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