Plasmonic semiconductor nanogroove array enhanced broad spectral band millimetre and terahertz wave detection

Tong, Jianhua; Suo, Fei; Zhang, Tianning; Huang, Zhiming; Chu, Junhao; Zhang, Dao Hua

doi:10.1038/s41377-021-00505-w

Cited by 39 publications

(24 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, the photocurrent was recorded with the modulation frequency f from 150 Hz to 100 kHz at 0.172 THz. The detector demonstrated a 3 dB bandwidth of 3.4 × 10 4 Hz, corresponding to a response time of 4.68 μs according to 𝜏 = 1 2𝜋f −3 dB , [5] which is consistent with the measurement result of the pulse in Figure 3f. We recorded the waveforms of the detector at 5 and 10 kHz in Figure 4f.…”

Section: Resultssupporting

confidence: 87%

“…However, it was observed that under the THz and MMW radiation, the resistance of the detector increases, which is the opposite of the result caused by the thermal effect. In addition, the thermal response speed is relatively slow, generally on the order of ≈ms, [ 5 ] which is much longer than the response time (≈2.5 µs) of the detector in THz and MMW bands. As a consequence, the contribution from the thermal effect can be excluded.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, thermal detectors generally suffer from a slow response. [ 5 ] Therefore, it is extremely urgent to explore new strategies for realizing high‐sensitivity broadband photodetection.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ultrabroadband Tellurium Photoelectric Detector from Visible to Millimeter Wave

Gao

Shang

et al. 2021

Advanced Science

Self Cite

View full text Add to dashboard Cite

Ultrabroadband photodetection is of great significance in numerous cutting-edge technologies including imaging, communications, and medicine. However, since photon detectors are selective in wavelength and thermal detectors are slow in response, developing high performance and ultrabroadband photodetectors is extremely difficult. Herein, one demonstrates an ultrabroadband photoelectric detector covering visible, infrared, terahertz, and millimeter wave simultaneously based on single metal-Te-metal structure. Through the two kinds of photoelectric effect synergy of photoexcited electron-hole pairs and electromagnetic induced well effect, the detector achieves the responsivities of 0.793 A W −1 at 635 nm, 9.38 A W −1 at 1550 nm, 9.83 A W −1 at 0.305 THz, 24.8 A W −1 at 0.250 THz, 87.8 A W −1 at 0.172 THz, and 986 A W −1 at 0.022 THz, respectively. It also exhibits excellent polarization detection with a dichroic ratio of 468. The excellent performance of the detector is further verified by high-resolution imaging experiments. Finally, the high stability of the detector is tested by long-term deposition in air and high-temperature aging. The strategy provides a recipe to achieve ultrabroadband photodetection with high sensitivity and fast response utilizing full photoelectric effect.

show abstract

Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Ultrabroadband Tellurium Photoelectric Detector from Visible to Millimeter Wave

Gao

Shang

et al. 2021

Advanced Science

Self Cite

View full text Add to dashboard Cite

show abstract

“…With the voltage of 25 V, the NEP of the QD microwheel array and QD film are 1.88 × 10 –14 and 6.6 × 10 –13 W Hz –1/2 , respectively. The rather lower NEP is just 1/7000 than a commercial Golay cell (140 pW Hz –1/2 ) and could be compared with the best results (2 × 10 –14 W Hz –1/2 ) obtained by the InSb nano grooves devices based on the same mechanism to our knowledge . The D * reaches 1.6 × 10 11 m Hz 1/2 W –1 which is 3 orders than the commercial thermal-type detector (1.9 × 10 8 m Hz 1/2 W –1 ) .…”

Section: Resultsmentioning

confidence: 50%

Terahertz Detectors for 6G Technology Using Quantum Dot 3D Concave Convergence Microwheel Arrays

Song

Zhou

et al. 2022

ACS Photonics

View full text Add to dashboard Cite

The 6G technology has defined 0.1–0.28 THz as the communication band. However, high-performance detectors in large areas at room temperature are still an enormous challenge. To greatly improve the performance of the THz detector, a room-temperature terahertz (THz) detector based on PbS quantum dot (QD) microwheel arrays have been designed and fabricated. The QD microwheel array was fabricated on a thin GaN/Si substrate and with the engraved periodic wheel. In addition, the concave convergence of the microwheel further improves the interaction between the terahertz wave and the device. The detector has been tested under the 6G communication frequencies of 0.14 and 0.28 THz and showed current responsivities of 3.12 and 4.67 A/W. The detector based on the QD microwheel array has shown a current responsivity up to 9 times higher compared with the signal QD film. The noise equivalent power valuesof the devices for 0.14 and 0.28 THz are 6.61 × 10–13 and 1.88 × 10–14 W/Hz1/2. The results give a chance to develop the large-area, high-performance THz detector based on QDs, which could provide a reliable alternative for 6G communication equipment at room temperature.

show abstract

“…Bolometers, pyroelectrics, and thermopiles are among the most used thermal detectors. Some notable methods to improve the moderate responsivity of thermal detectors are the membrane-suspended bolometer structure to reduce thermal conduction [ 12 , 13 , 14 , 15 ], a novel THz antenna-coupled bolometer to optimize THz wave collection [ 16 , 17 ], an optical focusing lens [ 18 , 19 ], a metal grating absorber structure [ 20 , 21 , 22 ], and utilization of a highly sensitive thin film material [ 23 , 24 ]. Further performance enhancement is still widely possible by enabling state-of-the-art fabrication and measurement technologies.…”

Section: Introductionmentioning

confidence: 99%

Responsivity and NEP Improvement of Terahertz Microbolometer by High-Impedance Antenna

Aji

Satoh

Apriono

et al. 2022

Sensors

View full text Add to dashboard Cite

The antenna-coupled microbolometer with suspended titanium heater and thermistor was attractive as a terahertz (THz) detector due to its structural simplicity and low noise levels. In this study, we attempted to improve the responsivity and noise-equivalent power (NEP) of the THz detector by using high-resistance heater stacked on the meander thermistor. A wide range of heater resistances were prepared by changing the heater width and thickness. It was revealed that the electrical responsivity and NEP could be improved by increasing the heater’s resistance. To make the best use of this improvement, a high-impedance folded dipole antenna was introduced, and the optical performance at 1 THz was found to be better than that of the conventional halfwave dipole antenna combined with a low-resistance heater. Both the electrical and optical measurement results indicated that the increase in heater resistance could reduce the thermal conductance in the detector, thus improved the responsivity and NEP even if the thermistor resistance was kept the same.

show abstract

Plasmonic semiconductor nanogroove array enhanced broad spectral band millimetre and terahertz wave detection

Cited by 39 publications

References 70 publications

Ultrabroadband Tellurium Photoelectric Detector from Visible to Millimeter Wave

Ultrabroadband Tellurium Photoelectric Detector from Visible to Millimeter Wave

Terahertz Detectors for 6G Technology Using Quantum Dot 3D Concave Convergence Microwheel Arrays

Responsivity and NEP Improvement of Terahertz Microbolometer by High-Impedance Antenna

Contact Info

Product

Resources

About