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CONFIDENTIAL CoE, Scientific Advisory Board Meeting, 9th September, Heikki Seppä Applied Quantum Electronics Heikki Seppä and Panu Helistö Technical Research.

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Presentation on theme: "CONFIDENTIAL CoE, Scientific Advisory Board Meeting, 9th September, Heikki Seppä Applied Quantum Electronics Heikki Seppä and Panu Helistö Technical Research."— Presentation transcript:

1 CONFIDENTIAL CoE, Scientific Advisory Board Meeting, 9th September, Heikki Seppä Applied Quantum Electronics Heikki Seppä and Panu Helistö Technical Research Centre of Finland, Sensors/Quantronics TEA (ThermoElectric Avalance)

2 CONFIDENTIAL CoE, Scientific Advisory Board Meeting, 9th September, Heikki Seppä Basic Research Future Needs and Customers Applied Research DevelopmentNeeds and Customers Enterprises Univeristies Research Centres Innovations Proactive Innovations Motivation - Proactive Inventions and Innovations Facts Real needs Future real needs Visions and imagination Virtual needs

3 CONFIDENTIAL CoE, Scientific Advisory Board Meeting, 9th September, Heikki Seppä Research Examples (2006) Towards quantum computer Teraherts imaging Invisible printable electric codes, carbon nanotubes Thermoelectric avalance in metalic nano arrays Recent projects and submitted project applications Patent applications (2006) Other results Future plans Contents

4 CONFIDENTIAL CoE, Scientific Advisory Board Meeting, 9th September, Heikki Seppä Towards quantum computing with superconducting solid state qubits Main problem: decoherence due to thermal noise and fluctuators in junctions and their neighborhood RSFQubit results 2006 high quality JJ junctions => reduced JJ noise e-ph coupling 'cooling fins' to achieve record low base temperature of shunt resistors RC shunts to isolate qubit from RSFQ dissipations Decoherence times ~5 us achieved Maria Gabriella Castellano, Leif Grönberg, Pasquale Carelli, Fabio Chiarello, Carlo Cosmelli, Roberto Leoni, Stefano Poletto, Guido Torrioli, Juha Hassel, Panu Helistö, Superconducting Science and Technology 19, (2006). J. Hassel, H. Seppä, P. Helistö, J. Kunert, L. Fritzsch and H.G. Meyer, Appl. Phys. Lett., accepted (2006)

5 CONFIDENTIAL CoE, Scientific Advisory Board Meeting, 9th September, Heikki Seppä Passive imaging with superconducting bolometers NIST - VTT collaboration 1-pixel Nb bolometer THz RT readout Linear scanning (2005) Background (reflected by concealed objects) at room temperature Skin at body temperature

6 CONFIDENTIAL CoE, Scientific Advisory Board Meeting, 9th September, Heikki Seppä NbN bolometer arrays fabricated at VTT NbN - higher normal state resistance => lower thermal conductance than Nb (lower noise), easier matching to antenna Tc can be tailored to optimize performance K 8-pixel subarrays developed => goal 128-pixel linear array P. Helistö, A. Luukanen, L. Grönberg, J.S. Penttilä, H. Seppä, H. Sipola, C.R. Dietlein and E.N. Grossman, Antenna-coupled microbolometers for passive THz direct detection imaging arrays, 36th European Microwave Conference 2006, Manchester 1015 September 2006.

7 CONFIDENTIAL CoE, Scientific Advisory Board Meeting, 9th September, Heikki Seppä The VTT room-temperature readout A novel readout method developed by VTT utilizes ETF Simple low noise JFET amplifier reads out the voltage across the bolometer With feedback through Z fb, voltage across bolometer is set to V At high frequencies, Z x maintains stability Bias point set at the bottom of the IV curve  large R d allows for easy noise matching H Seppä and P Helistö, pat. pend.

8 CONFIDENTIAL CoE, Scientific Advisory Board Meeting, 9th September, Heikki Seppä Electrical noise of a NbN microbolometer + RT readout First run of NbN test detectors Smooth IV curve - good quality bolometer wire Electrical NEP ~ 9 fW/sqHz (lowest measured at 4 K) NEP (fW/rtHz) V [mV] J.S. Penttilä, A. Luukanen, L. Grönberg, P. Helistö, H. Sipola, and H. Seppä, Seventh International Workshop on Low Temperature Electronics, WOLTE 7, WPP264, 2123 June 2006, ESTEC, Noordwijk, The Netherlands, (2006).

9 CONFIDENTIAL CoE, Scientific Advisory Board Meeting, 9th September, Heikki Seppä Printable nanotube based invisible electric code Utilizes proberties of single walled proberties nanotubes Near completely invisible Sufficient condactivity to electric detection (100 MHz) Applications: Invisible electric codes Printable active components NC2 24 nm 103,4 k Ω/□ 32,7 k Ω/□ NC 35 nm 18,1 k Ω/□ 3,79 kΩ/□ Ag 500 nm 4,93 Ω/□ 695 Ω/□ NC 2,93 μm 630 Ω/□ 354 Ω/□ Sheet resistance at 10 kHz

10 CONFIDENTIAL CoE, Scientific Advisory Board Meeting, 9th September, Heikki Seppä Nanoparticle TEM visualization thin polymer shell ~ 5 Å time

11 CONFIDENTIAL CoE, Scientific Advisory Board Meeting, 9th September, Heikki Seppä SEM before electrical sintering SEM after electrical sintering Electric Sintering Condactivity via tunneling (inelastic or elastic cotunneling ?), strong temperature dependence Room temperature sintering process Metallic coductivity

12 CONFIDENTIAL CoE, Scientific Advisory Board Meeting, 9th September, Heikki Seppä Thermoelectric Avalance 100  m self-organized creation of sintered or melted metallic wire - uniform width, - large aspect ratio not sintered nanoparticle array melted wire SEM AFM Click Video

13 CONFIDENTIAL CoE, Scientific Advisory Board Meeting, 9th September, Heikki Seppä Projects Quantronix (Panu Helistö) Submm Scanner, Tekes, Companies, (NIST), Printag, Tekes/FinNano, Companies, RSFQubit, EU FP6, Low-temperature Spectrometer Array, ESA GSTP G204-06M (SRON, ) Superconducting Read Out for Microcalorimeters, ESA TRP SCI-X10.a (SRON, ) Quantum Metrology Rriangle, Technology Industries of Finland, (MIKES, TKK, ). TeraEye, EU FP6, THz imaging based on quantum dot detectors, in negotiation, ITI, Thermoplexer, submitted (ESA) Printable Sensors (Ari Alastalo) Printable Electronics …, VTT, Printed RFID Sensor Solutions, Nordite/Tekes, Printable Functional Nano Structures, submitted to Teknologiateollisuuden säätiölle, Metallic and semiconducting nanoparticles for printable electronics, planning phase, EU-7 Biosensors (Kirsti Tappura) Biosystems, VTT, MEMS Based Later Bulk Acoustic Waves for Biosensors, Tekes, Companies, ( MEMS based Biosensors, planning phase, EU7, Terahertz Biospectrometer, planning phase, EU7,

14 CONFIDENTIAL CoE, Scientific Advisory Board Meeting, 9th September, Heikki Seppä Recent Patent Applications Directly linked to CeO Bolometer Amplifier based on the Thermoelectric Feedback, 2006 Multiplexing Scheme based on Thermoelectric Power Amplification and SIN-Junctions, 2006 Invisible Ink for Electric Coding based on Carbon Nanotubes, 2006 Sintering of Nanoparticles using Thermoelectric Avalance, 2006 Indirectly linked to CeO Several patent applications (2006, about 15) related to sensors, materials, telecommunication, patents are lisenced or sold during 2006

15 CONFIDENTIAL CoE, Scientific Advisory Board Meeting, 9th September, Heikki Seppä Other Results 1.New Research Team (Dr. Ari Alastalo) 2.Two Doctoral Thesis: Ari Alastalo and Anu Kärkkäinen 3.Two Spin-off Companies and one Join Company Directly Related to CeO Aivon Ltd, 2006, cryogenic detectors, dc and hg SQUIDs for Electa- Neuromag, Dr. Jari Penttilä (Shares: three Finns and VTT) Indirectly Related to CeO FennoID Ltd, 2006, RFID sollutions, Heikki Mamia (Shares: two Finns, German, Chinese, Indonesian and VTT) ReadTeck (Chína), 2006, Joint Company between FennoID (Finland) and TeckTop (China/Wuhan), RFID for China Markets (Traffic Customs) and Electric Codes

16 CONFIDENTIAL CoE, Scientific Advisory Board Meeting, 9th September, Heikki Seppä Future Plans Directly Related to CeO Teraherts Imiging Systems Teraherts Spectroscopy New Realisation for Quantum Triangle Sluice, BOT, unSQUID / Calorimetric detection of electrons Detectors and Electronics for Quantum Computing RFSQ Modified un SQUID (Quantum Limited Amplifier) Prediction: 12 times lower energy resolution than dc SQUID Indirectly Related to CeO Electric conductivity in 3D nano arrays Inorganic nanoparticles (metalic, semiconductive and ferroelectric) for printable electronics Terahertz spectroscopy for biotechnolgy


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