Prof. Jian Chen Profile

Prof. Jian Chen

at Nanjing University

SPIE Involvement:

Conference Program Committee | Author

Publications (18)

Proceedings Article | 9 October 2021 Poster

Poster

High sensitivity mid-infrared superconducting single-photon detector with Mo0.8Si0.2 nanowire

Qi Chen, Rui Ge, Labao Zhang, Feiyan Li, Biao Zhang, Feifei Jin, Hang Han, Yue Dai, Guanglong He, Yue Fei, Xiaohan Wang, Hao Wang, Xiaoqing Jia, Qingyuan Zhao, Xuecou Tu, Lin Kang, Jian Chen, Peiheng Wu

Proceedings Volume 11906, 1190617 (2021) https://doi.org/10.1117/12.2602573

KEYWORDS: Mid-IR, Superconductors, Single photon detectors, Nanowires, Single photon, Spectroscopy, Sensors, Photons, Oxygen, Nitrous oxide

Proceedings Article | 14 May 2019 Presentation

Presentation

Terahertz (THz) direct detectors based on superconducting HEBs with thermal, THz and microwave biasing methods (Conference Presentation)

Jian Chen

Proceedings Volume 10983, 109830N (2019) https://doi.org/10.1117/12.2518196

KEYWORDS: Terahertz radiation, Sensors, Superconductors, Microwave radiation, Medium wave, Double sideband modulation, Bolometers, Heterodyning, Receivers, Biology

Read Abstract +

Superconducting hot electron bolometers (HEBs) are widely used as terahertz (THz) heterodyne detectors (mixers) and becoming the most advantageous candidate for low noise receiver at frequencies above 1.2 THz. However, there is still lack of accurate theoretical modeling which explains the complex mechanism of different aspects of superconducting HEBs. These difficulties do not prevent researchers around the world from making experimental progress. In the last few years, superconducting HEBs are also used as THz direct detectors to develop the array for the applications in biology, medicine and security systems. Recently, a noise equivalent power (NEP) of 0.2 pW/√Hz at 2.5 THz is reported for the superconducting HEBs with thermal biasing. Instead of thermal one, microwave (MW) which was first used to stabilize the HEB mixer is also applied to bias the device as a direct detector. Furthermore, THz can be used to bias the HEBs, if THz sources can be provided easy. Although MW biasing can improve sensitivity of the superconducting HEB direct detectors, little work has been done to compare the responsivity and NEP among the THz direct detectors with thermal, THz and MW biasing. To find a best biasing method, we have studied the similarities and differences of the direct detectors based on the superconducting HEBs with three different biasing methods. The fabricated NbN HEB detectors consist of a complementary logarithmic-spiral antenna made of gold and an NbN film (bridge) connecting across the antenna’s inner terminals. We have fabricated the niobium nitride (NbN) superconducting HEB mixers with the system double sideband (DSB) noise temperature better than 8 times of the quantum limit: hf/kB (where h is the Planck constant, kB is the Boltzmann constant and f is the operating frequency) at the frequencies higher than 1 THz. Here, the mixer chips with the system DSB noise temperature of about 400 K and the intermediate frequency (IF) gain bandwidth (GBW) of larger than 5 GHz at 4.2 K and 0.65 THz have been used. As the direct detectors, the current responsivity of 290 A/W and 105 A/W are obtained for MW and THz biasing, which about one order higher than that of thermal biasing. The NEP of 2.7 pW/√Hz is obtained with MW biasing, which can be expected to be improved in the future.

Proceedings Article | 5 March 2018 Paper

Paper

The design of Nb5N6 microbolometer detector for 0.3 THz detector

Chengtao Jiang, Xuecou Tu, Peng Xiao, Shimin Zhai, Xiaoqing Jia, Lin Kang, Jian Chen, Peiheng Wu

Proceedings Volume 10531, 1053123 (2018) https://doi.org/10.1117/12.2292539

KEYWORDS: Terahertz radiation, Antennas, Niobium, Sensors, Microbolometers, Silicon, Bolometers, Vanadium, Oxides, Bismuth

Read Abstract +

Proceedings Article | 9 June 2017 Presentation

Presentation

Terahertz direct detectors based on superconducting hot electron bolometers (Conference Presentation)

Jian Chen, Shoulu Jiang, Lin Kang, Pei Heng Wu

Proceedings Volume 10209, 1020909 (2017) https://doi.org/10.1117/12.2264878

KEYWORDS: Sensors, Terahertz radiation, Superconductors, Bolometers, Heterodyning, Resistance, Astronomy, Microwave radiation, Niobium, Ultrafast phenomena

Read Abstract +

Proceedings Article | 24 February 2017 Paper

Paper

A sensitive coupling structure for terahertz detectors array

Peng Xiao, Xuecou Tu, Chengtao Jiang, Chao Wan, Zhou Jiang, Shimin Zhai, Min Gu, Xiaoqing Jia, Lin Kang, Jian Chen, Peiheng Wu

Proceedings Volume 10103, 101031R (2017) https://doi.org/10.1117/12.2251387

KEYWORDS: Microbolometers, Terahertz radiation, Microlens, Sensors, Gold, Reflectors, Silicon, Semiconducting wafers, Composites, Terahertz detection, Fabry–Perot interferometers, Refractive index, Finite-difference time-domain method, Optical design, Structural design, Detector arrays

Read Abstract +

Proceedings Article | 24 February 2017 Presentation + Paper

Presentation + Paper

A low noise readout integrated circuit for Nb5N6 microbolometer array detector

Zhou Jiang, Chao Wan, Peng Xiao, Chengtao Jiang, Xuecou Tu, Xiaoqing Jia, Lin Kang, Jian Chen, Peiheng Wu

Proceedings Volume 10103, 101030A (2017) https://doi.org/10.1117/12.2251400

KEYWORDS: Sensors, Terahertz radiation, Detector arrays, Microbolometers, Image sensors, Amplifiers, Imaging systems, Imaging arrays, Multiplexers, Readout integrated circuits, Niobium, Interference (communication), Detector development

Read Abstract +

Proceedings Article | 25 February 2016 Paper

Paper

Characterizations of diffractive microlens in Nb5N6 microbolometers array for THz detection

X. C. Tu, Y. F. Pei, P. Xiao, C. T. Jiang, C. Wan, L. Kang, J. Chen, P. H. Wu

Proceedings Volume 9747, 97470G (2016) https://doi.org/10.1117/12.2209078

KEYWORDS: Microbolometers, Sensors, Microlens array, Microlens, Terahertz detection, Terahertz radiation, Thin films, Homeland security, Aerospace engineering, Detector development, Silicon, Finite-difference time-domain method, Staring arrays, Diffraction

Read Abstract +

SPIE Journal Paper | 26 March 2014

Quasioptical terahertz detector based on the series connection of Nb5N6 microbolometers

Xuecou Tu, Lei Xu, Qingkai Mao, Chao Wan, Lin Kang, Biaobing Jin, Jian Chen, Peiheng Wu

JARS, Vol. 8, Issue 01, 084992, (March 2014) https://doi.org/10.1117/12.10.1117/1.JRS.8.084992

KEYWORDS: Sensors, Microbolometers, Terahertz radiation, Niobium, Antennas, Millimeter wave sensors, Signal detection, Modulation, Silicon, Staring arrays

Read Abstract +

Proceedings Article | 7 March 2014 Paper

Paper

Nb5N6 microbolometer array for a compact THz imaging system

X. Tu, Q. Mao, C. Wan, L. Xu, L. Kang, J. Chen, P. Wu

Proceedings Volume 8985, 89850V (2014) https://doi.org/10.1117/12.2038332

KEYWORDS: Microbolometers, Terahertz radiation, Imaging systems, Silicon, Finite-difference time-domain method, Antennas, Diffraction, Terahertz detection, Electromagnetic radiation, Mirrors

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SPIE Journal Paper | 27 February 2014

Effective receiving area of the antenna-coupled terahertz detector

Qingkai Mao, Xuecou Tu, Lei Xu, Chao Wan, Lin Kang, Jian Chen, Peiheng Wu

OE, Vol. 53, Issue 02, 023103, (February 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.2.023103

KEYWORDS: Terahertz radiation, Sensors, Niobium, Microbolometers, Antennas, Signal detection, Deconvolution, Millimeter wave sensors, Gaussian beams, Detection and tracking algorithms

Read Abstract +

Proceedings Article | 31 May 2013 Paper

Paper

Antenna-coupled uncooled Nb5N6 microbolometers for terahertz imaging

X. Tu, Q. Mao, L. Xu, C. Wan, Z. L. Sun, L. Kang, J. Chen, P. H. Wu

Proceedings Volume 8716, 871605 (2013) https://doi.org/10.1117/12.2014414

KEYWORDS: Microbolometers, Terahertz radiation, Silicon, Sensors, Receivers, Polarization, Antennas, Millimeter wave imaging, Imaging systems, Resistance

Read Abstract +

Proceedings Article | 29 March 2013 Paper

Paper

Spectral properties of ultra-broadband entangled photons generated from chirped-MgSLT crystal towards monocycle entanglement generation

Akira Tanaka, Ryo Okamoto, Hwan Hong Lim, Shanthi Subashchandran, Masayuki Okano, Labao Zhang, Lin Kang, Jian Chen, Peiheng Wu, Toru Hirohata, Sunao Kurimura, Shigeki Takeuchi

Proceedings Volume 8635, 86350X (2013) https://doi.org/10.1117/12.2003390

KEYWORDS: Photons, Crystals, Luminescence, Phase compensation, Terahertz radiation, Superconductors, Single photon detectors, Indium gallium arsenide, Monochromators, Photomultipliers

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Proceedings Article | 21 January 2012 Paper

Paper

Spectral dependence of ultra-low dark count superconducting single photon detector for the evaluation of broadband parametric fluorescence

Shanthi Subashchandran, Ryo Okamoto, Akira Tanaka, Masayuki Okano, Labao Zhang, Lin Kang, Jian Chen, Peiheng Wu, Shigeki Takeuchi

Proceedings Volume 8268, 82681V (2012) https://doi.org/10.1117/12.906534

KEYWORDS: Luminescence, Single photon detectors, Superconductors, Fiber couplers, Linear filtering, Signal detection, Mid-IR, Single mode fibers, Absorption, Nanowires

Read Abstract +

Proceedings Article | 24 February 2011 Paper

Paper

Nb5N6 bolometer operated at room temperature for detecting at 100 GHz

L. Kang, X. Lu, J. Chen, C. Cao, W. Xu, B. Jin, P. H. Wu, Q. Yao, S. C. Shi

Proceedings Volume 7938, 79380F (2011) https://doi.org/10.1117/12.874578

KEYWORDS: Bolometers, Modulation, Thin films, Resistance, Antennas, Receivers, Silicon, Signal detection, Niobium, Temperature metrology

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Proceedings Article | 25 January 2011 Paper

Paper

Fiber-coupled superconducting nanowire single photon detector for quantum key distribution

Labao Zhang, Qingyuan Zhao, Lin Kang, Jian Chen, Chunhai Cao, Peiheng Wu

Proceedings Volume 7960, 79600R (2011) https://doi.org/10.1117/12.874604

KEYWORDS: Superconductors, Quantum key distribution, Single photon detectors, Photodetectors, Quantum efficiency, Protactinium, Electron beam lithography, Reactive ion etching, Telecommunications, Nanowires

Read Abstract +

Proceedings Article | 8 October 2004 Paper

Paper

A high-temperature superconducting millimeter wave detecting system based on pulse tube cryocooler

Jian Chen, Peiheng Wu, Kensuke Nakajima, Tsutomu Yamashita

Proceedings Volume 5498, (2004) https://doi.org/10.1117/12.552448

KEYWORDS: Antennas, Cryocoolers, Superconductors, Video, Extremely high frequency, Sensors, Liquids, Helium, Superconducting detectors, Signal detection

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Proceedings Article | 13 November 1998 Paper

Paper

Submillimeter-wave detection and mixing experiments using high-temperature Josephson junctions

Jian Chen, Estuko Kobayashi, Hiroaki Myoren, Kensuke Nakajima, Tsutomu Yamashita, Sven Linzen, Frank Schmidl, Paul Seidel

Proceedings Volume 3465, (1998) https://doi.org/10.1117/12.331166

KEYWORDS: Silicon, Extremely high frequency, Antennas, Far infrared lasers, Spectroscopy, Magnetism, Polarization, Signal detection, Microwave radiation, Electromagnetic radiation

Read Abstract +

Proceedings Article | 10 August 1994 Paper

Paper

Fabrication and properties of field effect device based on bi-crystal grain boundary junction of YBa2Cu3O7-delta films

Kensuke Nakajima, Kazuki Yokota, Jian Chen, Hiroaki Myoren, Tsutomu Yamashita

Proceedings Volume 2158, (1994) https://doi.org/10.1117/12.182686

KEYWORDS: Dielectrics, Resistance, Superconductors, Modulation, Temperature metrology, Oxygen, Capacitance, Electrodes, Field effect transistors, Metals

Read Abstract +

Showing 5 of 18 publications

Conference Committee Involvement (9)

Infrared, Millimeter-Wave, and Terahertz Technologies XI

12 October 2024 | Nantong, Jiangsu, China

Infrared, Millimeter-Wave, and Terahertz Technologies X

15 October 2023 | Beijing, China

Infrared, Millimeter-Wave, and Terahertz Technologies IX

5 December 2022 | Online Only, China

Infrared, Millimeter-Wave, and Terahertz Technologies VIII

10 October 2021 | Nantong, JS, China

Infrared, Millimeter-Wave, and Terahertz Technologies VII

12 October 2020 | Online Only, China

Showing 5 of 9 Conference Committees

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