Journal Articles

L. Chen, W. Gao, C. Fumeaux, and W. Withayachumnankul, “Ultra-compact waveguide couplers for all-silicon terahertz platform,” Advanced Photonics Research, 2026. 

(Accepted)

Invited for a special issue on on On-chip Terahertz Photonic Manipulation for Future Communications

L. Chen, W. Gao, M. Abdullah, J. Hesler, C. Fumeaux, and W. Withayachumnankul, “All-dielectric bandpass filters for IEEE 802.15.3d terahertz communications,” IEEE Transactions on Terahertz Science and Technology, 2026.

(Accepted)

S. Quader, M. Abdullah, E. He, C. Fumeaux, and W. Withayachumnankul, "3D-printed frequency-diverse metasurface for camera-based terahertz frequency analyzer," IEEE Microwave and Wireless Technology Letters, 2026. 

(Accepted)

Selected by the committee for Special Issue on Asia-Pacific Microwave Conference 2025

X. You, V. Pagay, and W. Withayachumnankul, “Non-contact monitoring of plant leaf water status using terahertz waves,” Journal of Infrared, Millimeter, and Terahertz Waves, vol. 46, no. 8, art. no. 53, 2025.

D. Headland, H. Lees, W. Withayachumnankul, G. Carpintero, “Broadband point source for terahertz silicon guides,” IEEE Antennas and Wireless Propagation Letters, vol. 24, no. 11, pp. 4393–4397, 2025.

Special Cluster on Terahertz Antennas for 6G and Beyond: Innovative Design, Manufacturing, and Advanced Applications

M. Sun, H. Lees, and W. Withayachumnankul, "All-dielectric tapered rod antenna with sub-wavelength grating for terahertz waves," IEEE Antennas and Wireless Propagation Letters, vol. 24, no. 11, pp. 4368–4372, 2025. 

Special Cluster on Terahertz Antennas for 6G and Beyond: Innovative Design, Manufacturing, and Advanced Applications

L. Chen, W. Gao, C. Fumeaux, and W. Withayachumnankul, "Terahertz integrated polarization filter based on slotted Bragg grating," IEEE Transactions on Terahertz Science and Technology, vol. 15, no. 3, pp. 473–480, 2025.

X. You, R. T. Ako, S. Sriram, and W. Withayachumnankul, "3D terahertz confocal imaging with chromatic metasurface," Laser & Photonics Reviews, vol. 19. no. 7 art. no. 2401011, 2025.

B. Chung, H. Lees, M. Ibrahim, D. Headland, and W. Withayachumnankul, “Highly efficient terahertz dark-field imaging system with 3D-printed components,” Journal of Physics: Photonics, vol. 7, no. 2, art. no. 025012, 2025.

Invited

M. Abdullah, E. He, M. Shehata, K. Wang, and W. Withayachumnankul, "Nonlinearity compensation for terahertz communications through neural networks," Optics Express, vol. 33, no. 5, pp. 11178–11191, 2025.

W. Gao, M. Fujita, S. Murakami, T. Nagatsuma, C. Fumeaux, and W. Withayachumnankul, “Ultra-wideband terahertz integrated polarization multiplexer,” Laser & Photonics Reviews, vol. 19, no. 1, art. no. 2400270, 2025.

Covered by IEEE Spectrum, EurekAlert and other online scientific news media

H. Lees, M. Sakaki, D. Headland, N. Benson, J. C. Balzer, and W. Withayachumnankul, "Terahertz stepped-height waveguide with 3D-printing," IEEE Transactions on Microwave Theory and Techniques, vol. 73, no. 9, pp. 5876–5884, 2025.

Special Issue on Emerging Materials and Processing Technologies for RF/Microwave Applications and Wireless Systems

D. Headland, P. Dechwechprasit, and W. Withayachumnankul, “Monolithically integrated mode converter from terahertz substrateless silicon guide to conductive slotline” Applied Physics Letters, vol. 125, art. no. 071101, 2024.

Invited

Special Collection: Hybrid and Heterogeneous Integration in Photonics: From Physics to Device Applications

H. Lees, D. Headland, and W. Withayachumnankul, “Terahertz extreme skin-depth waveguides,” IEEE Transactions on Terahertz Science and Technology, vol. 14, no. 5, pp. 758–767, 2024.

B. Chung, D. Headland, W. Withayachumnankul, “Terahertz imaging with 3D-printed Risley-prism and telecentric objective,” IEEE Transactions on Terahertz Science and Technology, vol. 14, no. 4, pp. 446–454, 2024.

S. Quader, R.-T. Ako, S. Sriram, C. Fumeaux, and W. Withayachumnankul, “Mechanically reconfigurable polarization converter for terahertz waves,” IEEE Transactions on Terahertz Science and Technology, vol. 14, no. 4, pp. 502–509, 2024.

H. Lees, D. Headland, S. Murakami, M. Fujita, and W. Withayachumnankul, “Terahertz radar with all-dielectric leaky-wave antenna,” APL Photonics, vol. 9, no. 3, art. no. 036107, 2024.

D. Headland, A. Kumar, H. Lees, W. Withayachumnankul, G. Carpintero, “Matched dielectric slot waveguide as all-dielectric terahertz magnetic dipole,” Optics Letters, vol. 49, no. 5, pp. 1361–1364, 2024.

Editor's pick

M. Li, M. Abdullah, J. He, K. Wang, C. Fumeaux, and W. Withayachumnankul, “Frequency-diverse antenna with convolutional neural networks for direction of arrival estimation in terahertz communications,” IEEE Transactions on Terahertz Science and Technology, vol. 14, no. 3, pp. 354–363, 2024.

Featured article 

M. Li, R.-T. Ako, S. Sriram, C. Fumeaux, and W. Withayachumnankul, “Terahertz planar cavity antenna based on effective medium for wireless communications,” IEEE Transactions on Terahertz Science and Technology,  vol. 14, no. 2, pp. 248–257, 2024.

One of the top 5 most popular papers of the transactions in 2024

P. Dechwechprasit, H. Lees, D. Headland, C. Fumeaux, and W. Withayachumnankul, “1-to-N terahertz integrated switches enabling multi-beam antennas,” Optica, vol. 10, no. 11, pp. 1551–1558, 2023.

J. Carter, H. Lees, Q. Wang, S. Chen, S. Atakaramians, and W. Withayachumnankul, “Terahertz properties of common microwave dielectric materials,” Journal of Infrared, Millimeter, and Terahertz Waves, vol. 44, pp. 873–884, 2023.

M. Shehata, K. Wang, and W. Withayachumnankul, "Carrierless amplitude and phase modulation for terahertz communications," IEEE Journal of Selected Topics in Quantum Electronics, vol. 29, no. 5, art. no. 8600714, 2023.

Special Issue on Terahertz Photonics

D. Headland, M. Fujita, G. Carpintero, T. Nagatsuma, and W. Withayachumnankul, "Tutorial: Terahertz integration platforms using substrateless all-silicon microstructures," APL Photonics,  vol. 8, art. no. 091101, 2023.

Invited

Featured article 

P. Dechwechprasit, R. T. Ako, S. Sriram, C. Fumeaux, and W. Withayachumnankul, "Terahertz disk resonator on substrateless dielectric waveguide platform," Optics Letters, vol. 48, no. 17, pp. 4685–4688, 2023.

H. Lees, C. Hayes, and W. Withayachumnankul, "Terahertz coherence tomography for in-container liquid characterization," IEEE Journal of Selected Topics in Quantum Electronics,  vol. 29, no. 5, art. no. 8600408, 2023.

Special Issue on Terahertz Photonics

Featured by IEEE Photonics Society

M. Li, R.-T. Ako, S. Sriram, C. Fumeaux, and W. Withayachumnankul, "Terahertz metasurface for near-field beam conversion," Optics Letters,  vol. 48, no. 8, pp. 2202–2205, 2023.

Editor's pick

M. Li, T. V. Mai, C. Fumeaux, S. Suzuki, and W. Withayachumnankul, "Terahertz resonant-tunneling diode with series-fed patch array antenna," IEEE Transactions on Terahertz Science and Technology, vol. 13, no. 2, pp. 178–187, 2023.

Among top 5 popular articles March 2023

X. You, R. T. Ako, M. Bhaskaran, S. Sriram, C. Fumeaux, and W. Withayachumnankul, "Mechanically tunable terahertz circular polarizer with versatile functions," Laser & Photonics Reviews, art. no. 2200305, 2023.

J. C. Balzer, C. J. Saraceno, M. Koch, P. Kaurav, U. R. Pfeiffer, W. Withayachumnankul, T. Kürner, A. Stöhr, M. El-absi, A. Al-haj Abbas, T. Kaiser, and A. Czylwik, "THz systems exploiting photonics and communications technologies," IEEE Journal of Microwaves, vol. 3, no. 1, pp. 268–288, 2023.

Invited

D. Headland and W. Withayachumnankul, "News and Views—In the shadow of the laser phantom needle cross: Dynamic air-plasma aperture sheds light on terahertz microscopy," Light: Science & Applications, vol. 11, art. no. 147, 2022.

X. You, C. Fumeaux, and W. Withayachumnankul, “Tutorial on broadband transmissive metasurfaces for wavefront and polarization control of terahertz waves,” Journal of Applied Physics,  vol. 131, art. no. 061101, 2022.

Invited for Special Topic Collection "Metasurfaces for Photonic Devices", guest edited by I. Staude, H.-T. Chen, A. Miroshnichenko, J. Takahara, and W. J. Padilla.

Editor's pick;  Among most-read editor's picks; 2022 Early Career Investigator Selection

X. Lv, R. T. Ako, M. Bhaskaran, S. Sriram, C. Fumeaux, and W. Withayachumnankul, “Frequency-selective surface based mechanically reconfigurable terahertz bandpass filter,” IEEE Transactions on Terahertz Science and Technology,  vol 12, no. 3, pp 257–266, 2022.

Highlighted in IEEE MTT-S Newsletter, March 2022

One of the top 6 most popular papers of the transactions in 2022

M. Shehata, K. Wang, J. Webber, M. Fujita, T. Nagatsuma, and W. Withayachumnankul, “Timing-jitter tolerant Nyquist pulse for terahertz communications,” Journal of Lightwave Technology,  vol. 40, no. 2, pp. 557–564, 2022.

Special Issue on Optical Systems and Technologies for 6G Mobile Networks

H. Lees, W. Gao, and W. Withayachumnankul, "All-silicon, low-crosstalk terahertz waveguide crossing based on effective medium," Optics Letters, vol. 46, no. 21, pp. 5469–5472, 2021.

M. Shehata, K. Wang, J. Webber, M. Fujita, T. Nagatsuma, and W. Withayachumnankul, "IEEE 802.15.3d-compliant waveforms for terahertz wireless communications," Journal of Lightwave Technology, vol. 39, no. 24, pp. 7748–7760, 2021.

Special Issue on Microwave Photonics

X. You, R. T. Ako, W. S.-L. Lees, M. Bhaskaran, S. Sriram, C. Fumeaux, and W. Withayachumnankul, "Terahertz transmissive half-wave metasurface with enhanced bandwidth," Optics Letters,  vol. 46, no. 17, 4164–4167, 2021.

W. Gao, W. S.-L. Lees, C. Fumeaux, and W. Withayachumnankul, "Effective-medium-clad Bragg grating filters," APL Photonics, vol. 6, no. 7, art. no. 076105, 2021.

J. Liang, W. Gao, H. Lees, and W. Withayachumnankul, "All-silicon terahertz planar horn antenna," IEEE Antennas and Wireless Propagation Letters, vol. 20, no. 11, pp. 2181–2185, 2021.

Special Cluster on "Antenna Considerations for Future Millimeter-Wave and Terahertz Wireless Systems"

D. Headland, W. Withayachumnankul, M. Fujita, and T. Nagatsuma, "Gratingless integrated tunneling multiplexer for terahertz waves," Optica, vol. 8, no. 5, pp. 621–629, 2021. 

Covered by ARC, OSA Optics & Photonics News, Phys.org, and other online scientific news media; Special collection of standout research in integrated photonics

M. E. Ibrahim, D. Headland, W. Withayachumnankul, and C. H. Wang, "Nondestructive testing of defects in polymer-matrix composite materials for marine applications using terahertz waves," Journal of Nondestructive Evaluation, vol. 40, art. no. 37, 2021.

W. Gao, W. S.-L. Lee, X. Yu, M. Fujita, T. Nagatsuma, C. Fumeaux, and W. Withayachumnankul, "Characteristics of effective-medium-clad dielectric waveguides," IEEE Transactions on Terahertz Science and Technology, vol. 11, no. 1, pp. 28–41, 2021.

One of the top 4 most popular papers of the transactions in 2021

W. S.-L. Lee, A. Ferrante, W. Withayachumnankul, and J. A. Able, "Assessing frost damage in barley using terahertz imaging," Optics Express, vol. 28, no. 21, pp. 30644–30655, 2020.

Covered by Optics & Photonics News, Phys.org, and other online scientific news media

D. Headland, W. Withayachumnankul, X. Yu, M. Fujita, and T. Nagatsuma, “Unclad microphotonics for terahertz waveguides and systems,” Journal of Lightwave Technology, vol. 38, no. 24, pp. 6853–6862, 2020.

X. You, R. T. Ako, W. S.-L. Lee, M. Bhaskaran, S. Sriram, C. Fumeaux, and W. Withayachumnankul, “Broadband terahertz transmissive quarter-wave metasurface," APL Photonics, vol. 5, no. 9, art. no. 096108, 2020.

2020 Future Luminary Award Finalists

H. Li, M. X. Low, R. T. Ako, M. Bhaskaran, S. Sriram, W. Withayachumnankul, B. T. Kuhlmey, and S. Atakaramians, “Broadband single-mode hybrid photonic crystal waveguides for terahertz integration on a chip,” Advanced Materials Technologies, vol. 5, no. 7, art. no. 2000117, 2020.

Inside front cover

R. T. Ako, W. S. L. Lee, S. Atakaramians, M. Bhaskaran, S. Sriram, and W. Withayachumnankul, “Ultra-wideband tri-layer transmissive linear polarization converter for terahertz waves,” APL Photonics, vol. 5, no. 4, art. no. 046101, 2020.

Editor’s pick

2020 Future Luminary Award Finalists

X. You, A. Upadhyay, Y. Cheng, M. Bhaskaran, S. Sriram, C. Fumeaux, and W. Withayachumnankul, “Ultra-wideband far-infrared absorber based on anisotropically-etched doped silicon,” Optics Letters, vol. 45, no. 5, pp. 1196–1199, 2020.

A. Ebrahimi. R. T. Ako, W. S. L. Lee, M. Bhaskaran, S. Sriram, and W. Withayachumnankul, “High-Q terahertz absorber with stable angular response,” IEEE Transactions on Terahertz Science and Technology, vol. 10, no. 2, pp. 204–211, 2020. 

R. T. Ako, A. Upadhyay, W. Withayachumnankul, M. Bhaskaran, and S. Sriram, “Dielectrics for terahertz metasurfaces: Material selection and fabrication techniques,” Advanced Optical Materials, vol. 8, no. 3, 1900750, 2020.

Invited

W. Gao, X. Yu, M. Fujita, T. Nagatsuma, C. Fumeaux, and W. Withayachumnankul, “Effective-medium-cladded dielectric waveguides for terahertz waves,” Optics Express, vol. 27, no. 26, pp. 38721–38734, 2019.

Supplementary video

Among top downloads in terahertz optics and imaging 

R. T. Ako, W. S.-L. Lee, M. Bhaskaran, S. Sriram, and W. Withayachumnankul, “Broadband and wide-angle reflective linear polarization converter for terahertz waves,” APL Photonics, vol. 4, no. 9, art. no. 096104, 2019.

Editor’s pick

X. You, R. T. Ako, W. S.-L. Lee, M. X. Low, M. Bhaskaran, S. Sriram, C. Fumeaux, and W. Withayachumnankul, “Terahertz reflectarray with enhanced bandwidth,” Advanced Optical Materials, vol. 7, no. 20, art. no. 1900791, 2019.

Inside front cover

D. Headland, W. Withayachumnankul, R. Yamada, M. Fujita, and T. Nagatsuma, “Terahertz multi-beam antenna using photonic crystal waveguide and Luneburg lens,” APL Photonics, vol. 3, art. no. 126105, 2018.

Featured article

W. Withayachumnankul, M. Fujita, and T. Nagatsuma, “Integrated silicon photonic crystals towards terahertz communications,” Advanced Optical Materials. vol. 6, art. no. 1800401, 2018. 

Invited

W. S.-L. Lee, R. T. Ako, M. X. Low, M. Bhaskaran, S. Sriram, C. Fumeaux, and W. Withayachumnankul, “Dielectric-resonator metasurfaces for broadband terahertz quarter- and half-wave mirrors,” Optics Express, vol. 26, no. 11, pp. 14392–14406, 2018. 

W. Withayachumnankul, R. Yamada, M. Fujita, and T. Nagatsuma, “All-dielectric rod antenna array for terahertz communications,” APL Photonics, vol. 3, no. 5, art. no. 051707, 2018. 

Featured article

The design was mentioned in ‘News & Views: Terahertz surprises’, Nature Photonics, 12, 128–130, 2018; http://rdcu.be/HQrO 

D. Headland, Y. Monnai, D. Abbott, C. Fumeaux, and W. Withayachumnankul, “Tutorial: Terahertz beamforming, from concepts to realizations,” APL Photonics, vol. 3, art. no. 051101, 2018. 

Invited for special issue on Frontiers on THz Photonic Devices

W. S.-L. Lee, S. Nirantar, D. Headland, M. Bhaskaran, S. Sriram, C. Fumeaux, and W. Withayachumnankul, “Broadband terahertz circular-polarization beam splitter,” Advanced Optical Materials, vol. 6, no. 3, art. no. 1700852, 2018. 

Front cover

Among the Best of Advanced Optical Materials 2018