Prospects for InP-based integrated photonics
Meint K. SMIT
COBRA Research Institute, Eindhoven University of Technology,
Photonic Integration is making rapid progress. InP PICs play an increasingly important role in telecommunications and data communications, and novel appIications are emerging in other fields, like fibre sensing technology, medical diagnostics and metrology. InP-based foundry processes offer low-cost access to mature integration processes with high performance, and wafer-scale integration of InP-based photonic circuits with silicon electronics is emerging. In the presentation an overview will be given of recent developments with emphasis on future prospects.
Plasmonics – a Technology for Microscale High-Speed Integrated Optics
Juerg LEUTHOLD, Wolfgang HENI, Claudia HOESSBACHER, Christian HAFFNER, Yannick SALAMIN, Ueli KOCH, Yuriy FEDORYSHYN, Romain BONJOUR, Arne JOSTEN, Benedikt BAEUERLE, David HILLERKUSS,
ETH Zurich, 8091 Zurich, Switzerland
Plasmonics is increasingly attracting the attention of the optical community [1-4]. The new field promises novel ultra-compact devices in combination with speed only limited by the RC constants of the attached driver circuits. This talk will review key aspects of plasmonics and will discuss opportunities and challenges of plasmonic communications. Plasmonic communication is an emerging field that promises the generation, processing, transmission, sensing and detection of signals at optical frequencies along a surface of a tiny metal. The term “plasmonics” has been brought to the spotlight by H.A. Atwater and other pioneers in anticipation for an entirely new class of devices with ultra-compact dimensions operating up to highest bandwidths. Meanwhile more than 50’000 scientific articles pop up when searching the web for “plasmonics”.
Monolithically integrated coupled-cavity quantum cascade lasers
M. BUGAJSKI1, K. PIERŚCIŃSKI1, D. PIERŚCIŃSKA1, P. GUTOWSKI1, I. SANKOWSKA1, O. SEREBRENNIKOVA1, P. KARBOWNIK1, M. PLUSKA1, A. CZERWINSKI1, M. KUC2, R. SARZAŁA2, T. CZYSZANOWSKI2, G. HAŁDAŚ3, A. KOLEK3
1Institute of Electron Technology, Al. Lotników 32/46,
02 668 Warsaw, Poland
2Institute of Physics, Łódź University of Technology, Wólczańska 219,
90 924 Łódź, Poland
3Department of Electronics, Rzeszów University of Technology, W. Pola 2,
35 959 Rzeszów, Poland
Single mode, room-temperature quantum cascade lasers emitting in the 9.5 µm range have been produced by focused ion beam (FIB) etching. Modification of the resonator geometry by dividing the cavity into two sections separated by a small gap, of the order of emission wavelength, results in strong optical coupling of the sections and consequently leads to a strong modification of spectral properties of the emitted radiation. Additional possibilities of influencing the mode structure of coupled-cavity quantum cascade laser (CC QCL) are provided by the feasibility of independent current injection into each section. The long section provides gain and can be operated in pulse or continuous mode. The short section provides the possibility to fine tune its refractive index, through injection of carriers. The stable, single mode emission was observed within temperature tuning range, with a side mode suppression ratio of 43 dB. The paper will review our recent results on design, technology and fabrication of aAs and InP based mid-IR CC QCLs. We will also discuss a new type of two section, coupledcavity QCLs with monolithically integrated heater (CC IH QCL), designed for extended temperature tuning.