Applications using high-Tc superconducting terahertz emitters

Nakade, K.; Kashiwagi, Takanari; Saiwai, Y.; Minami, Hidetoshi; Yamamoto, Takashi; Klemm, Richard A.; Kadowaki, K.

doi:10.1038/srep23178

Cited by 32 publications

(17 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As compact solid-state devices, intrinsic Josephson-junction (IJJ) stacks made of the high-criticaltemperature (T c ) superconductor Bi 2 Sr 2 CaCu 2 O 8+δ (BSCCO) have attracted much attention due to their potential to radiate especially at subterahertz frequencies [3][4][5], and intensive experimental and theoretical research has been performed. The possibility to perform terahertz imaging [65][66][67][68] and gas detection [69] or to realize an all-high-T c integrated receiver [70] has been demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Compact High- Tc Superconducting Terahertz emitter operating up to 86 K

Sun

Wieland

et al. 2018

Phys. Rev. Applied

View full text Add to dashboard Cite

We report on a Stirling-cooled compact Bi 2 Sr 2 CaCu 2 O 8+δ intrinsic Josephson-junction stack with very high critical current density and improved cooling, operating at bath temperatures T b up to 86 K. The square stand-alone stack is embedded between two sapphire substrates. For bath temperatures between 27.8 and 86 K emission is observed at frequencies from 0.356 to 2.09 THz. The emission power exceeds 1 μW at bath temperatures between 60 and 80 K for emission frequencies between 0.5 and 0.88 THz. A record high value of 0.577 THz is obtained for the emission frequency at T b = 80 K, which is important for potential applications using liquid nitrogen as a coolant. We also compare our experimental results with numerical simulations based on three-dimensional coupled sine-Gordon equations combined with heat diffusion equations.

show abstract

Section: Introductionmentioning

confidence: 99%

Compact High- Tc Superconducting Terahertz emitter operating up to 86 K

Sun

Wieland

et al. 2018

Phys. Rev. Applied

View full text Add to dashboard Cite

show abstract

“…The highest degree of circular polarization (DOCP) recorded in the study proposed herein is 99.7%, which is higher than that recorded by state-of-the-art quantum cascade lasers used for obtaining circular polarization [9,10,27]. As circularly polarized THz waves could be employed in a wide variety of potential applications, the result obtained in this study, along with recently reported packaging [28] and demonstration of THz torch [29], it is believed, will significantly influence and inspire the development of practical applications of IJJ-based THz emission devices [4,30].…”

Section: Introductionmentioning

confidence: 58%

Monolithic Superconducting Emitter of Tunable Circularly Polarized Terahertz Radiation

et al. 2017

View full text Add to dashboard Cite

We propose an approach to control the polarization of terahertz (THz) radiation from intrinsic Josephsonjunction stacks in single crystalline high-temperature superconductor Bi2Sr2CaCu2O8. Monolithic control of the surface high-frequency current distributions in the truncated square mesa structure allows us to modulate the polarization of the emitted THz wave as a result of two orthogonal fundamental modes excited inside the mesa. Highly polarized circular terahertz waves with a degree of circular polarization of more than 99% can be generated using an electrically controlled method. The intuitive results obtained from the numerical simulation based on the conventional antenna theory are consistent with the observed emission characteristics.

show abstract

“…Later Nakade et al demonstrated a compact and userfriendly transmission THz imaging system (see Fig. 11) using a rectangular stand-alone IJJ THz emitter made by Ar milling as the THz source, a Stirling cryo-cooler engine, two THz lenses, an InSb hot-electron bolometer detector, a lock-in amplifier, two-dimensional scanning stage, an analog to digital converter, a function generator, and a temperature controller [91]. The system could be easily operated down to T= 40 K. They have also developed a home-built Michelson type of interferometer for the realization of phase-sensitive imaging systems.…”

Section: -Transmission Type Imagingmentioning

confidence: 99%

“…To demonstrate the performance of the THz transmission imaging system, two samples, (i) an integrated circuit (IC) card [91] and (ii) a thin razor blade placed inside a brown paper envelope, were considered [40] (see Fig. 12).…”

Section: -Transmission Type Imagingmentioning

confidence: 99%

Integrated, Portable, Tunable, and Coherent Terahertz Sources and Sensitive Detectors Based on Layered Superconductors

et al. 2020

Self Cite

View full text Add to dashboard Cite

At terahertz (THz) frequencies, between 0.1-10 THz, current compact emitter and receiver technologies are generally inefficient and impractical. Hence, a gap exists between mature microwave and developed optical technologies. On-chip, integrated broadly tunable and powerful quantum sources that coherently radiate THz waves between 0.1 and 11 THz (potentially extendable to 15 THz) and with potential output power of > 1 mW can be achieved based on quantum tunneling of electron pairs across the stack of intrinsic Josephson junctions (IJJs) naturally present in a single crystal of the layered high-Tc superconducting Bi2Sr2CaCu2O+ (BSCCO). Such devices have been found to be especially promising solid-state THz sources capable of bridging the entire THz gap, as their wide frequency tunability range is superior to that obtained from their semiconducting based rivals, either single resonant tunneling diodes (RTDs) or THz-quantum cascade lasers (QCLs). Due to the unique electrodynamics of BSCCO, they can also be operated as switching current detectors, paving the way for the realization of on-chip THz integrated circuits for applications in ultrahigh-speed telecommunications, quantum information, on-chip spectroscopy, and non-destructive sensing, testing, and imaging. This paper reviews the history and recent advances in THz sources and detectors based on IJJs with a focus on the application of IJJ THz devices in THz spectroscopy, and various types of THz imaging systems such as r eflection, transmission, and computed tomography. We show that compact IJJ THz devices with sub-centimeter-sized modules are easy to use in many applications, as they can be regarded as pocket quantum THz torches.

show abstract

Applications using high-Tc superconducting terahertz emitters

Cited by 32 publications

References 58 publications

Compact High- Tc Superconducting Terahertz emitter operating up to 86 K

Compact High- Tc Superconducting Terahertz emitter operating up to 86 K

Monolithic Superconducting Emitter of Tunable Circularly Polarized Terahertz Radiation

Integrated, Portable, Tunable, and Coherent Terahertz Sources and Sensitive Detectors Based on Layered Superconductors

Contact Info

Product

Resources

About