Dr. Hou-Tong Chen Profile

Dr. Hou-Tong Chen

at Los Alamos National Lab

SPIE Involvement:

Conference Program Committee | Author

Publications (19)

SPIE Journal Paper | 30 August 2023 Open Access

Making and breaking terahertz waves with fluid plasmas

Jacob Pettine, Hou-Tong Chen

PI, Vol. 2, Issue 03, C05, (August 2023) https://doi.org/10.1117/12.10.3788/PI.2023.C05

KEYWORDS: Terahertz radiation, Plasmas, Ultrafast phenomena, Spectroscopy, Laser frequency, Imaging spectroscopy, Polarization, Gas lasers, Transient nonlinear optics, Solid state electronics

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Proceedings Article | 20 August 2020 Presentation + Paper

Near-field probing of strong light-matter coupling in single IR antennae

O. Mitrofanov, C.-F. Wang, T. Habteyes, T. S. Luk, J. Klem, I. Brener, H.-T. Chen

Proceedings Volume 11499, 114990A (2020) https://doi.org/10.1117/12.2568033

KEYWORDS: Antennas, Quantum wells, Polaritons, Near field, Nanoantennas, Spectroscopy, Microscopes, Quantum cascade lasers

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Proceedings Article | 18 September 2018 Presentation

Broadband terahertz polarization conversion using metasurfaces (Conference Presentation)

Hou-Tong Chen, Chun-Chieh Chang

Proceedings Volume 10756, 107560C (2018) https://doi.org/10.1117/12.2322496

KEYWORDS: Polarization, Resonators, Reflectivity, Metamaterials, Optical properties, Terahertz radiation, Terahertz spectroscopy, Circular dichroism spectroscopy

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Proceedings Article | 14 May 2018 Presentation

Narrowband terahertz bandpass filters based on metasurfaces (Conference Presentation)

Hou-Tong Chen, Chun-Chieh Chang, Li Huang, John Nogan

Proceedings Volume 10656, 1065616 (2018) https://doi.org/10.1117/12.2301006

KEYWORDS: Bandpass filters, Terahertz radiation, Imaging spectroscopy, Gold, Molecular spectroscopy, Antireflective coatings, Silicon, Optical filters, Image filtering, Spectroscopy

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Proceedings Article | 9 June 2017 Presentation

Highly efficient terahertz metasurface flat lenses (Conference Presentation)

Hou-Tong Chen

Proceedings Volume 10209, 1020903 (2017) https://doi.org/10.1117/12.2266427

KEYWORDS: Lenses, Terahertz spectroscopy, Electromagnetic radiation, Visible radiation, Microwave radiation, Polarization, Terahertz radiation, Spectroscopes, Digital imaging, Image compression

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Proceedings Article | 19 April 2017 Presentation

High-performance terahertz metasurface lenses (Conference Presentation)

Hou-Tong Chen

Proceedings Volume 10103, 101031G (2017) https://doi.org/10.1117/12.2257949

KEYWORDS: Wavefronts, Microwave radiation, Lenses, Polarization, Integrated optics, Integrated photonics, Wave propagation, Absorption, Optical design, Optical components

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Proceedings Article | 9 November 2016 Presentation

Electrically switchable metamaterials and devices (Conference Presentation)

Hou-Tong Chen

Proceedings Volume 9920, 992020 (2016) https://doi.org/10.1117/12.2238905

KEYWORDS: Metamaterials, Graphene, Terahertz metamaterials, Electromagnetism, Temperature metrology, Semiconductors, Resonators, Diffraction gratings, Mid-IR, Current controlled current source

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Proceedings Article | 13 May 2015 Paper

Tuning of terahertz metamaterials’ resonances via near field coupling

Abul Azad, Dibakar Roy Chowdhury, Hou-Tong Chen, Antoinette Taylor

Proceedings Volume 9483, 94830G (2015) https://doi.org/10.1117/12.2182969

KEYWORDS: Metamaterials, Terahertz radiation, Resonators, Near field, Ultrafast phenomena, Inductance, Silicon, Electromagnetism, Near field optics, Picosecond phenomena

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Proceedings Article | 1 May 2012 Paper

Thermal and ultrafast optical tuning of ultrathin high-temperature superconducting terahertz metamaterials

Ranjan Singh, Jie Xiong, Dibakar Roy Chowdhury, Hao Yang, Abul Azad, Stuart Trugman, Q. X. Jia, Antoinette Taylor, Hou-Tong Chen

Proceedings Volume 8423, 84230Y (2012) https://doi.org/10.1117/12.922161

KEYWORDS: Metamaterials, Superconductors, Terahertz radiation, Ultrafast phenomena, Thermography, Temperature metrology, Technetium, Switching, Metals, Picosecond phenomena

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Proceedings Article | 21 February 2011 Paper

Ultrafast optical control of terahertz surface plasmons in subwavelength hole-arrays at room temperature

Abul Azad, Hou-Tong Chen, Antoinette Taylor, Weili Zhang, John O'Hara

Proceedings Volume 7937, 79370B (2011) https://doi.org/10.1117/12.873488

KEYWORDS: Terahertz radiation, Gallium arsenide, Surface plasmons, Silicon, Switching, Ultrafast phenomena, Dielectrics, Metals, Superlattices, Modulation

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Extraordinary optical transmission through subwavelength metallic hole-arrays has been an active research area since its first demonstration. The frequency selective resonance properties of subwavelength metallic hole arrays, generally known as surface plasmon polaritons, have potential use in functional plasmonic devices such as filters, modulators, switches, etc. Such plasmonic devices are also very promising for future terahertz applications. Ultrafast switching or modulation of the resonant behavior of the 2-D metallic arrays in terahertz frequencies is of particular interest for high speed communication and sensing applications. In this paper, we demonstrate ultrafast optical control of surface plasmon enhanced resonant terahertz transmission in two-dimensional subwavelength metallic hole arrays fabricated on gallium arsenide based substrates. Optically pumping the arrays creates a thin conductive layer in the substrate reducing the terahertz transmission amplitude of both the resonant mode and the direct transmission. Under low optical fluence, the terahertz transmission is more greatly affected by resonance damping than by propagation loss in the substrate. An ErAs:GaAs nanoisland superlattice substrate is shown to allow ultrafast control with a switching recovery time of ~10 ps. We also present resonant terahertz transmission in a hybrid plasmonic film comprised of an integrated array of subwavelength metallic islands and semiconductor hole arrays. Optically pumping the semiconductor hole arrays favors excitation of surface plasmon resonance. A large dynamic transition between a dipolar localized surface plasmon mode and a surface plasmon resonance near 0.8 THz is observed under near infrared optical excitation. The reversal in transmission amplitude from a stop-band to a pass-band and up to π/ 2 phase shift achieved in the hybrid plasmonic film make it promising in large dynamic phase modulation, optical changeover switching, and active terahertz plasmonics.

Proceedings Article | 23 February 2010 Paper

Metamaterial based devices for terahertz imaging

Xomalin Peralta, Michael Wanke, Igal Brener, Jerry Waldman, William Goodhue, J. Li, Abul Azad, Hou-Tong Chen, Antoinette Taylor, John O'Hara

Proceedings Volume 7562, 75620I (2010) https://doi.org/10.1117/12.846823

KEYWORDS: Terahertz radiation, Metamaterials, Polarization, Modulators, Attenuators, Quantum cascade lasers, Modulation, Wave plates, Millimeter wave imaging, Control systems

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Proceedings Article | 7 February 2009 Paper

Terahertz metamaterials

Hou-Tong Chen, John O'Hara, Abul Azad, Willie Padilla, Richard Averitt, Antoinette Taylor

Proceedings Volume 7214, 721417 (2009) https://doi.org/10.1117/12.812052

KEYWORDS: Terahertz radiation, Metamaterials, Modulation, Semiconductors, Picosecond phenomena, Silicon, Split ring resonators, Switching, Metals, Gallium arsenide

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Proceedings Article | 7 February 2009 Paper

Terahertz spectroscopy of two-dimensional subwavelength plasmonic structures

Abul Azad, Hou-Tong Chen, Antoinette Taylor, John O'Hara, Jiaguang Han, Xinchao Lu, Weili Zhang

Proceedings Volume 7214, 72140Z (2009) https://doi.org/10.1117/12.811194

KEYWORDS: Terahertz radiation, Surface plasmons, Metals, Silicon, Dielectrics, Plasmonics, Lead, Terahertz spectroscopy, Semiconductors, Skin

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Proceedings Article | 8 January 2008 Paper

Opto-electronic control of terahertz metamaterials

Willie Padilla, Hou-Tong Chen, John O'Hara, Antoinette Taylor, Richard Averitt

Proceedings Volume 6801, 68010H (2008) https://doi.org/10.1117/12.759163

KEYWORDS: Metamaterials, Terahertz radiation, Dielectrics, Semiconductors, Electromagnetism, Picosecond phenomena, Switching, Magnetism, Optoelectronics, Control systems

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Proceedings Article | 26 September 2007 Paper

Terahertz metamaterial devices

R. D. Averitt, W. J. Padilla, H. T. Chen, J. F. O'Hara, A. J. Taylor, C. Highstrete, M. Lee, J. M. O. Zide, S. R. Bank, A. C. Gossard

Proceedings Volume 6772, 677209 (2007) https://doi.org/10.1117/12.751613

KEYWORDS: Metamaterials, Terahertz radiation, Electromagnetism, Dielectrics, Modulation, Gallium arsenide, Semiconductors, Terahertz metamaterials, Physics

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Proceedings Article | 21 May 2007 Paper

Terahertz metamaterials for active, tunable, and dynamic devices

Nathan Landy, Hou-Tong Chen, John O'Hara, Joshua Zide, Arthur Gossard, Clark Highstrete, Mark Lee, Antoinette Taylor, Richard Averitt, Willie Padilla

Proceedings Volume 6581, 65810P (2007) https://doi.org/10.1117/12.724394

KEYWORDS: Metamaterials, Terahertz radiation, Dielectrics, Control systems, Electromagnetism, Semiconductors, Terahertz spectroscopy, Diodes, Gallium arsenide, Spectroscopes

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Proceedings Article | 29 December 2004 Paper

Terahertz near-field microscopy

Hou-Tong Chen, Gyu Cheon Cho, Roland Kersting

Proceedings Volume 5593, (2004) https://doi.org/10.1117/12.571300

KEYWORDS: Terahertz radiation, Near field, Gold, Signal detection, Dielectrics, Mie scattering, Capacitance, Near field scanning optical microscopy, Silicon, Spatial resolution

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Proceedings Article | 20 September 2002 Paper

Comparison of trap stiffness between a solid-mode optical trap and a donut-mode optical trap

H. Chen, Zan Gong, Y. M. Li, L. R. Lou, D. Zhang, L. Yin

Proceedings Volume 4927, (2002) https://doi.org/10.1117/12.471436

KEYWORDS: Optical tweezers, Particles, Microscopes, Laser scattering, Scattering, Solids, Wavefronts, Yeast, Semiconductor lasers, Biology

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Proceedings Article | 12 April 2002 Paper

High-precision measurements in an optical tweezers for studying single-biomolecule motion

H. Chen, Y. M. Li, L. R. Lou, H. Wang

Proceedings Volume 4536, (2002) https://doi.org/10.1117/12.462528

KEYWORDS: Optical tweezers, Charge-coupled devices, Photodiodes, Motion measurement, Optical testing, Precision measurement, Ferroelectric materials, Particles, Sensors, CCD image sensors

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