Conception, fabrication and characterization of devices dedicated to identification and autthentication applications in THz domain

Master 2 internship topic

Conception, fabrication and characterization of devices dedicated to identification and
autthentication applications in THz domain

Subject :
THz spectroscopy (1 THz = 10¹² Hz), born in the 80s, makes it possible to probe, thanks to the use offemtosecond lasers (1 fs = 10-¹5s), the electromagnetic properties of materials between 100 GHz and 3500 GHz typically. IMEP-LAHC, with more than 20 years of experience, is today the leading French laboratory in
the field and has acquired international recognition.
This internship subject is offered as part of two research contracts funded by the AURA region (AUTHANTIC and PLATERA projects). These projects aim to provide solutions for identification and authentication in theTHz domain. The Master 2 internship will focus on the design of THID (TeraHertz Identification) tag structures based on 1D periodic structures of the diffraction grating type (see Fig. 1), which will have been previously simulated.

The project consists of:

1.  Simulate 1D periodic structures such as diffraction gratings in order to identify patterns and dimensions of interest. For this, digital tools developed in the laboratory (Modal Fourier Method or Differential Method) will be available and used during the course.
2.  Manufacture by 3D printing in-house (3D wire printer and UV polymerization) and by subcontracting the identified structures.
3. Characterize the fabricated structures using the laboratory’s THz spectrometers. To do this, we use technology of the “THz time domain spectroscopy” and “CW” (continuous waves) type which allow the former to obtain the signature of a device in a very wide range of frequencies, typically between 0.1 and 5-6 THz via a single measurement and for the latter to perform measurements with a much higher spectral resolution, of the order of 0.1 GHz.
4.  Analyze the simulated and measured signatures to be able to propose “optimized” structural patterns.

This subject has a strong experimental component as well as a theoretical component related to the modeling and identification of structures of interest.

Supervisors :
F. GARET, IMEP-LAHC, tél. 04 79 75 86 78 (frederic.garet@univ-smb.fr)
M. BERNIER, IMEP-LAHC, tél. 04 79 75 87 48 (maxime.bernier@univ-smb.fr)

Training place :
IMEP-LAHC ( Chambery and Grenoble sites / Minatec)

Grant:
About  550 €/month during the  stage (5 months)

Students mail area of expertise:
Optics, Optoelectronics, electromagnetism

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