- Prof. Markku Kuittinen
- Prof. Yuri Svirko
- PhD, Associate Professor Matthieu Roussey (Design & Characterization)
- PhD Markus Häyrinen (Fabrication)
- PhD Janne Laukkanen (Fabrication)
- PhD Ismo Vartiainen (Fabrication)
- MSc Leila Ahmadi (Replicated nanophotonics)
- MSc Arijit Bera (Silicon photonics)
- MSc Somnath Paul (Silicon photonics)
- Prof. Seppo Honkanen
- PhD Petri Stenberg
High speed, low power consumption, low loss, mass production, low cost, disposable, and portable are nowadays the requirements for the photonic components we will use in everyday life in the near future. Based on highly integrated waveguide optics our activity find applications mainly in sensing and telecommucations.
The most common nanostructure on which we are working are the nano-waveguides, slot waveguides, ring resonators, and photonic crystals. The main materials we are using are silicon, lithium niobate, and titanium dioxide.
Using well established and reliable calculation methods we are designing and optimizing micro and nano-photonic devices. The two principal methods used are the Finite Difference Time Domain method and the Fourier Modal Method.
The clean room of the Institute of Photonics offers unique facilities allowing us to realize the tiny structures we have imagined. Electron Beam Lithography (EBL), Atomic Layer Deposition (ALD), Reactive Ion Etching (RIE), Nano-Imprint Lithography (NIL) are examples of techniques used to fabricate our devices.
The broad area of application of our structures requires several techniques of characterization and a well-equipped laboratory. We have the possibility to measure the propagation losses in waveguides using three techniques (Fabry-Pérot, cut-back, and ring resonator), to measure transmission and reflection spectra of nano-structures integrated on waveguides, to work in free space or totally in-fiber. Some of the equipment available is: Optical Spectrum Analyzer (400 nm < λ < 1700 nm), C-band tunable laser sources (centered at λ=1550 nm), Erbium Doped Fiber Amplifier (EDFA, 18 dBm and 30 dbm), Visible fibered lasers, Supercontinuum source (100 mW, 400 nm < λ < 2400 nm), Piezo-electric actuators (30 nm resolution over 1.2 cm travel), Polarization management, cameras (visible and IR), Fiber splicer, and Prism Coupler (λ=532 nm , λ=635 nm , λ=1550 nm) for refractive index, propagation loss, dn/dT, and SPR measurements .
ALD for nano