Semiconductor-superlattice parametric oscillator for generation of sub-terahertz and terahertz waves

Renk, K. F.; Rogl, A.; Stahl, B. I.

doi:10.1016/j.jlumin.2006.08.037

Cited by 13 publications

(11 citation statements)

References 19 publications

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“…is the strong nonlinearity caused by Bragg reflections of the miniband electrons. Further and more detailed theoretical investigations are published elsewhere [28,29]; in these studies, it is also shown that space charge domains can be absent.…”

Section: Theory Of Spo Actionmentioning

confidence: 94%

Semiconductor-Superlattice Parametric Oscillator as a Subterahertz and Possible Terahertz Radiation Source

Renk

Rogl

Stahl

et al. 2007

Advances in OptoElectronics

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We describe the operation of a semiconductor-superlattice parametric oscillator (SPO) at a subterahertz frequency (near 300 GHz). The oscillator is driven by a microwave source (frequency near 100 GHz). We also present an analysis indicating that operation at frequencies above 1 THz should be possible. The SPO is based on the ability of conduction electrons in a superlattice to perform Bloch oscillations. Broadband tunability as well as the monochromacy of a driving microwave field are transferred to the SPO.

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Section: Theory Of Spo Actionmentioning

confidence: 94%

Semiconductor-Superlattice Parametric Oscillator as a Subterahertz and Possible Terahertz Radiation Source

Renk

Rogl

Stahl

et al. 2007

Advances in OptoElectronics

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“…Based on the nonlinearity, superlattice detectors [8] (up to 12 THz [9,10]), frequency mixers [11] (up to 0.5 THz), and frequency multipliers [12] (up to 3 THz [13,14]) have been developed. Recently, a microwave pumped parametric oscillator for upconversion of radiation to higher-harmonic radiation has been proposed [15] and parametric oscillation at the third harmonic (near 300 GHz) of a pump field has been demonstrated [16][17][18]; for a recent discussion of nonlinear effects see also Litvinov and Manasson [19]. Here, we report on a parametric oscillator that operated synchronously on two different harmonics of a pump frequency, namely on the third and fifth harmonic.…”

mentioning

confidence: 91%

Double-resonance Semiconductor Superlattice Parametric Oscillator for Generation of Subterahertz Radiation

Rogl

Renk

Stahl

et al. 2008

Int J Infrared Milli Waves

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We report on a subterahertz superlattice parametric oscillator that operated simultaneously at two different harmonic frequencies of a microwave pump field. A pump field (frequency near 100 GHz) was coupled to a GaAs/AlAs superlattice in a resonator for the third and the fifth harmonic. The pump field produced a third harmonic field and this together with the pump field created a fifth harmonic field. A theoretical analysis indicates that the nonlinearity, which is based on the dynamics of miniband electrons, should allow for the upconversion of pump radiation of higher frequency into the terahertz frequency range.Keywords Semiconductor-superlattice · Parametric gain · Terahertz radiation source PACS 73.21.Cd · 42.65.Ky · 07.57.HmThe confinement of the energy of conduction electrons in a semiconductor superlattice to a miniband is expected to give rise to a strong transport nonlinearity caused by Bragg reflections of the miniband electrons. For creation of a miniband, Keldysh suggested to make use of high frequency ultrasonic waves [1]. Esaki and Tsu proposed to prepare composite superlattices [2]. As a consequence of the nonlinearity, a negative differential conductivity of a superlattice in a static field has been predicted [2] as well as gain for high frequency radiation up to the terahertz (THz) frequency range [3]. Composite superlattices prepared by molecular beam epitaxy made it possible to observe negative differential conductivity [4]. Superlattices have been used as active elements of oscillators [5], up to frequencies around 100 GHz [6]. Evidence for THz

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“…Since the pioneering work of Esaki and Tsu [1], semiconductor superlattices (SLs) have attracted very large interest owing to their vertical transport properties and potential applications at microwave frequencies [2][3][4][5][6]. During the past decade, studies of the interaction of carriers with high-frequency electrical and far infrared fields in SLs have been intensively carried out, and as a result, a number of phenomena have been revealed, including: Bloch gain [7][8][9][10]; quantum cascade lasing [11,12]; parametric THz radiation [13,14]; noise-induced current switching [15]; coherence resonance [16,17]; and high-frequency quasi-periodic and chaos generation [18][19][20][21][22]. In addition, new devices with prospective applications in microwave and THz technologies have been developed, e.g.…”

Section: Introductionmentioning

confidence: 99%

A weakly coupled semiconductor superlattice as a harmonic hypersonic-electrical transducer

et al. 2015

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We study experimentally and theoretically the effects of high-frequency strain pulse trains on the charge transport in a weakly coupled semiconductor superlattice. In a frequency range of the order of 100 GHz such excitation may be considered as single harmonic hypersonic excitation. While travelling along the axis of the SL, the hypersonic acoustic wavepacket affects the electron tunnelling, and thus governs the electrical current through the device. We reveal how the change of current depends on the parameters of the hypersonic excitation and on the bias applied to the superlattice. We have found that the changes in the transport properties of the superlattices caused by the acoustic excitation can be largely explained using the current-voltage relation of the unperturbed system. Our experimental measurements show multiple peaks in the dependence of the transferred charge on the repetition rate of the strain pulses in the train. We demonstrate that these resonances can be understood in terms of the spectrum of the applied acoustic perturbation after taking into account the multiple reflections in the metal film serving as a generator of hypersonic excitation. Our findings suggest an application of the semiconductor superlattice as a hypersonic-electrical transducer, which can be used in various microwave devices.

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Semiconductor-superlattice parametric oscillator for generation of sub-terahertz and terahertz waves

Cited by 13 publications

References 19 publications

Semiconductor-Superlattice Parametric Oscillator as a Subterahertz and Possible Terahertz Radiation Source

Semiconductor-Superlattice Parametric Oscillator as a Subterahertz and Possible Terahertz Radiation Source

Double-resonance Semiconductor Superlattice Parametric Oscillator for Generation of Subterahertz Radiation

A weakly coupled semiconductor superlattice as a harmonic hypersonic-electrical transducer

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