Study of High-Power Wideband Terahertz-Pulse Generation Using Integrated High-Speed Photoconductive Semiconductor Switches

Kirawanich, Phumin; Yakura, S. J.; Islam, Naz E.

doi:10.1109/tps.2008.2006978

Cited by 39 publications

(20 citation statements)

References 15 publications

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“…To do so we have developed a new numerical method based on FDTD [13]. The PCA emission has been already studied [14][15][16][17][18][19][20]. There are numerical and experimental studies of receivers based on PCAs [19,[21][22][23][24]; however, as far as we know, the lack of simultaneously simple and accurate numerical methods to simulate reception processes is one of the issues of major concern in THz-TDS and THz-I studies.…”

Section: Introductionmentioning

confidence: 99%

Time-domain numerical modeling of terahertz receivers based on photoconductive antennas

et al. 2015

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We present here a simulator that solves the main semiconductor charge and transport equations coupled to Maxwell equations to study receivers based on photoconductive antennas (R-PCAs). Making use of this tool we were able to correctly characterize the operation of these antennas. In doing so, we compared simulations with the results of the semi-empirical expression I THz t ∝ σ c t E THz t employed to evaluate the detected photocurrent by means of the convolution between the photoconductivity in the receiver and the electric field linked to the emitter antenna. We were able to accurately reproduce experimental data with our simulation tool. These kinds of tools are essential to model photoconductive antennas, a fundamental step needed for the development of terahertz time-domain spectroscopy applications based on PCAs.

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Section: Introductionmentioning

confidence: 99%

Time-domain numerical modeling of terahertz receivers based on photoconductive antennas

et al. 2015

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“…For instance, cell analysis, 1,2 ultrawide band (UWB) communications, 3,4 and terahertz pulsed technology. 5 Therefore, it is of great interest to explore the functionality and applicability of PFL based circuit, which was originally developed in the pulsed power community, in standard digital CMOS technologies.…”

Section: Introductionmentioning

confidence: 99%

Pulse-forming-line based on-chip short pulse generator

Huan¹,

Wang

2015

Review of Scientific Instruments

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A traditional pulse generation circuit based on the pulse-forming-line (PFL) is implemented in a commercial 0.13 μm digital CMOS technology. A meandered on-chip coplanar waveguide is used as the PFL, and CMOS transistor is used as switch in the Cadence Spectre simulation. The circuit sample is fabricated and tested. Pulses of ∼170 ps durations and 120-200 mV amplitudes are obtained when the power supply is tuned from 1.2 V to 2 V. The results show that the traditional PFL based circuit can be implemented in standard CMOS technology for on-chip short pulse generation. Furthermore, the PFL circuits significantly extend the short pulse generation capabilities of CMOS technology.

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“…With further researches, it has been gradually recognized the application prospects of terahertz wave in the fields of communications, medical, security and materials science [1][2][3][4][6][7][8][9][10][11][12] . At the present stage, the technology of THz pulses generated using linear photoconductivity antennas has been widely used.…”

Section: Introductionmentioning

confidence: 99%

The THz emission properties of GaAs photoconductive antenna with strong electric fields

Xue

2012

Isape2012

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The terahertz (THz) emission properties of GaAs photoconductive antennas with strong electric fields are discussed; the transient transport characteristics of non-equilibrium carriers (hot electrons) within the photoconductive antenna were comparatively analyzed. It is shown that there are significant differences in the average drift velocity variation with strong and weak electric field. In the initial phase, optical wave scattering is mainly caused by small-angle scattering, carriers are accelerated by ballistic transport to reach higher electron energy in a shorter time, and the transient drift-velocity quickly rises, which is a main reason of the stronger THz radiation.

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Study of High-Power Wideband Terahertz-Pulse Generation Using Integrated High-Speed Photoconductive Semiconductor Switches

Cited by 39 publications

References 15 publications

Time-domain numerical modeling of terahertz receivers based on photoconductive antennas

Time-domain numerical modeling of terahertz receivers based on photoconductive antennas

Pulse-forming-line based on-chip short pulse generator

The THz emission properties of GaAs photoconductive antenna with strong electric fields

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