Analysis and design of a continuous-wave terahertz photoconductive photomixer array source

Saeedkia, Daryoosh; Mansour, Raafat R.; Safavi‐Naeini, Safieddin

doi:10.1109/tap.2005.859909

Cited by 27 publications

(20 citation statements)

References 38 publications

(33 reference statements)

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“…Recently, THz emission was demonstrated with a planar large-area PC emitter consisting of interdigitated electrode metal-semiconductor-metal (MSM) structures on a bulk SI GaAs wafer [69]. This device can be regarded as an array of closely spaced single PC emitters and in this terms it has been investigated theoretically for THz cw-signal generation [70]. The design proposed in Ref.…”

Section: Application Examples: Thz Waveguide Probe-tip and Antenna Dmentioning

confidence: 99%

Coherent and ultrafast optoelectronics in III–V semiconductor compounds

Först

Nagel

Awad

et al. 2007

Physica Status Solidi (b)

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PACS 63. 22.+m, 71.55.Eq, 72.20.Jv, 78.47.+p III -V compound semiconductors offer a fascinating multitude of phenomena which have become accessible via ultrafast time-resolved spectroscopy. Coherent vibronic and electronic dynamics are prepared by excitation with taylored femtosecond laser pulses. The analysis of their temporal dephasing or decay provides deep insights into the interaction between electronic and vibronic degrees of freedem and the surrounding bath in high purity quantum structures. In contrast to coherent electronic or vibronic states, deliberately introduced growth defects can be used to drastically shorten the lifetime of optically excited carriers. Sub-picosecond carrier lifetimes open the possibility to realize ultrafast saturable absorbers and optoelectronic transducer elements. They are particularly important as key elements in THz technology, such as efficient THz emitters, detectors, and for on-chip THz technology. This paper summarizes the most distinguished results relevant in the context of ultrafast optoelectronics and THz technology obtained in close collaboration with the Paul-Drude-Institute Berlin over the past decade.

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Section: Application Examples: Thz Waveguide Probe-tip and Antenna Dmentioning

confidence: 99%

Coherent and ultrafast optoelectronics in III–V semiconductor compounds

Först

Nagel

Awad

et al. 2007

Physica Status Solidi (b)

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“…Analysis and design of photomixer array is also studied as a way to increase the THz radiation power [5]. Here we coherently synthesize two continuous microwave signals generated by two optical beats for the enhancement of the microwave power.…”

Section: Introductionmentioning

confidence: 99%

Coherent synthesis of two continuous microwave signals generated by two optical beats

Takeuchi

Chujo

Yamamoto

et al. 2014

IEICE Electron. Express

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Two continuous 6-GHz signals were spatially synthesized by two optical beats, so that the microwave power was increased by 6 dB. Time delay difference between two optical beats were adjusted by altering the SMF length or LD wavelength. Also two continuous 20-GHz signals were synthesized by two optical beats and detected by Schottky Barrier Diode. Frequency of the synthesized 20-GHz signal was estimated from the measured time delay difference between two optical beats.

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“…Often a damage threshold of 1 mW=lm 2 is given for 780-800 nm radiation. 9,21 One option to circumvent this is to increase the total power at constant intensity by moving to large area emitters, but their efficiency is much lower than that of small-area antenna coupled emitters. 6 With arrays of small emitters, a higher total power can be obtained, [21][22][23] but at present experimental investigations mostly concentrate on pulsed excitation and numerical analysis indicates a sublinear increase of total power with array size, 21 i.e., a large array does not reach the efficiency of single emitters.…”

Section: Introductionmentioning

confidence: 99%

Diamond heat sinking of terahertz antennas for continuous-wave photomixing

Ackemann

Alduraibi

Campbell

et al. 2012

Journal of Applied Physics

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The generation of cw Terahertz radiation from photomixing in low-temperature grown GaAs is limited by the thermal load for single emitters. We propose a new heat sinking scheme based on high thermal conductivity, transparent crystalline heat spreaders as diamond in direct contact with the active zone. A first working device based on recessed electrodes is demonstrated and has a significant power dissipation capability of more than 0.75 W (average). The electrical and terahertz characteristics are analyzed. V C 2012 American Institute of Physics. [http://dx

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Analysis and design of a continuous-wave terahertz photoconductive photomixer array source

Cited by 27 publications

References 38 publications

Coherent and ultrafast optoelectronics in III–V semiconductor compounds

Coherent and ultrafast optoelectronics in III–V semiconductor compounds

Coherent synthesis of two continuous microwave signals generated by two optical beats

Diamond heat sinking of terahertz antennas for continuous-wave photomixing

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