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Instrumentation, characterization and measurements


11:00: High Sensitivity SSR Based Sensor Used for Permittivity Measurement

Youness Zaarour (1), Mohammed Ali Ennasar (2), Otman El Mrabet (2), Hafid Griguer (1), M'Hamed Drissi (3)
(1)Mohammed VI Polytechnic University (Morocco) , (2)University of Abdelmalek Essaadi (Morocco) , (3)INSA Rennes (France)

The proposed compact sensor is based on a Split Square Resonator (SRR) to improve the detection. The dimensions of the SRR have been chosen to provide a mutual coupling with a high sensitivity. The material under test (MUT) is placed in the near-field region of the sensor. This design exhibits a high sensitivity close to 58% as the relative permittivity of MUT's changes from 1 to 10. The proposed sensor can measure the permeability and losses.
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11:15 Invited talk: Real-time measurement system using multi-wavelength THz-wave parametric generation and detection

online, live

Kosuke Murate, Kodo Kawase
Nagoya University (Japan)

In this study, we achieved real-time identification of reagents using combination of machine learning and simultaneous generation and detection of multiwavelength terahertz (THz) waves by injection seeded terahertz wave parametric generator (is-TPG).
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11:35 Keynote talk: Generating topological states with non-Hermiticity and symmetry breaking

online, on-demand

Masaya Notomi
Tokyo Institute of Technology (Japan)

We present our recent theoretical and experimental works regarding ways to generate photonic topological states in photonic crystals, by breaking the crystal symmetry, with adding phase-change materials / non-Hermitian periodic modulation. We also show various interplays of polarization singular points and exceptional points in non-Hermitian photonic crystals, leading to interesting chiral properties.
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12:05 Invited talk: Backward Terahertz-wave parametric oscillator and its application in nondestructive testing

online, on-demand

Hiroaki Minamide
RIKEN center for Advanced Photonics (Japan)

We demonstrated backward terahertz-wave parametric oscillation and generated terahertz-wave pulses with a high peak intensity of about 200 W at 0.3 THz. And Terahertz-wave imaging was performed using the source for nondestructive testing applications. Due to the long-time stability of terahertz-wave oscillation, transmission images with good visibility and inside information were obtained by point scanning imaging. As a result of measuring various materials, we found that the system is applicable to versatile nondestructive inspection applications.
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