1. University of Siegen Institute of High Frequency and Quantum Electronics (HQE) Peter Haring Bolívar Gunnar Spickermann H Y P E R I A S – WP2 The HYPERIAS project has received funding from the European Community’s Seventh Framework Programme under Grant Agreement No. 324445

2. WP2 - Objectives Goal: Development of Imaging and Hyper- Spectral Sensing Approaches – Development on Sensor, Data processing and System level required Efficient and robust material identification The HYPERIAS project has received funding from the European Community’s Seventh Framework Programme under Grant Agreement No. 324445

3. WP2 - Objectives Study of artefacts in typical application situations and their influences Optimise sensing concepts Development of data processing algorithms Realisation of real-time processing solution Preparation of implementation into controller The HYPERIAS project has received funding from the European Community’s Seventh Framework Programme under Grant Agreement No. 324445

4. WP2 - Schedule The HYPERIAS project has received funding from the European Community’s Seventh Framework Programme under Grant Agreement No. 324445 Milestones: – M12: First revision of material recognition algorithms in a transmission geometry – M24: First revision of material recognition algorithms in a transmission geometry – M36: Final revision of algorithms

5. WP2 - Deliverables M12: Definition of algorithm requirements M24: Report on spectral artefacts for material identification M36: Final algorithm report M36: Final test results of algorithms M42: Algorithms applied to hyper-spectral imager The HYPERIAS project has received funding from the European Community’s Seventh Framework Programme under Grant Agreement No. 324445

6. WP2 - State of the art The HYPERIAS project has received funding from the European Community’s Seventh Framework Programme under Grant Agreement No. 324445 Dependency of explosives spectra on surface roughness [van Rheenen et al, Proc. SPIE 8017, 801719 (2011)] Standing waves create reflectivity peaks exceeding unity [Choi et al, Phil. Trans. R. Soc. Lond. A 362, 337 (2004)]

7. WP2 - State of the art The HYPERIAS project has received funding from the European Community’s Seventh Framework Programme under Grant Agreement No. 324445 [Zurk et al, Proc. SPIE 6949, 694907 (2008)] Spectra are influenced by – Standing waves – Setup geometry – Surface roughness – Illumination angle – …

8. WP2 - State of the art Photoconductive THz-Time Domain Spectroscopy (Broadband) The HYPERIAS project has received funding from the European Community’s Seventh Framework Programme under Grant Agreement No. 324445 [Fischer et al, Proc IEEE 95, 1592 (2007)]

9. WP2 - State of the art The HYPERIAS project has received funding from the European Community’s Seventh Framework Programme under Grant Agreement No. 324445 [Kawase et al, Opt. Expr. 11, 2549 (2003)] [Zhang et al, Ppl. Phys. Lett. 92, 091117 (2008)] b) 1.80 THz, c) 0.82 THz, d) 1.08 THz Broadband EO-TDS

10. Material spectra depend on matrix – Absorption and reflectivity may change depending on surrounding matrix WP2 - Preliminary work The HYPERIAS project has received funding from the European Community’s Seventh Framework Programme under Grant Agreement No. 324445

11. WP2 - Preliminary work Crystallisation modifies spectra – Manufacturer 1: More monoclinic – Manufacturer 2: More Orthorhombic The HYPERIAS project has received funding from the European Community’s Seventh Framework Programme under Grant Agreement No. 324445

12. WP2 – Other approaches Antenna-coupled thermo-elements: NEP: 170pW per pixel (8 elements) The HYPERIAS project has received funding from the European Community’s Seventh Framework Programme under Grant Agreement No. 324445 [Huhn et al, APL 102, 121102 (2013)]

13. WP2 – Other approaches Heterodyne detection – Need for LO – Synchronisation can be challenging The HYPERIAS project has received funding from the European Community’s Seventh Framework Programme under Grant Agreement No. 324445 [Boppel et al., Opt. Lett. 37, 536 (2012)]

14. WP2 – Other approaches Consider coherent electro-optical detection? The HYPERIAS project has received funding from the European Community’s Seventh Framework Programme under Grant Agreement No. 324445 [Friederich et al, IEEE Trans. THz Sci. Tech. 1, 183 (2011)] [See Friederich et al, IEEE Trans. Microw. Theo. Tech. 58, 2022 (2010)]

15. [PhD-Thesis Gunnar Spickermann 2012, Schwarte et al., Proc. SPIE, 3100, 245 (1997)] WP2 – Other approaches Electro-optic detection - Preliminary work: – Detection limit: ~1pW average THz-Power per pixel or ~100mV/cm electric field strength The HYPERIAS project has received funding from the European Community’s Seventh Framework Programme under Grant Agreement No. 324445

16. WP2 – First issues Which detection principles to investigate? – CMOS! Thermo-couples? Electro-optics? Identification of spectral artefacts – Emphasis on materials relevant for security applications Exchange of research staff for knowledge transfer (Source – Detector – Analysis) The HYPERIAS project has received funding from the European Community’s Seventh Framework Programme under Grant Agreement No. 324445

17. Thank you for your attention The HYPERIAS project has received funding from the European Community’s Seventh Framework Programme under Grant Agreement No. 324445 Prof. Peter Haring Bolívar Dr. Gunnar Spickermann