Heterogeneous integration of KY(WO4)2-on-glass: A bonding study

Carlijn I. van Emmerik*, Raimond Frentrop, Meindert Dijkstra, Frans Segerink, Roy Kooijman, Muhammad Muneeb, Gunther Roelkens, Elise Ghibaudo, Jean-Emmanuel Broquin, Sonia M. Garcia-blanco

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

5 Citations (Scopus)
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Rare-earth ion doped potassium yttrium double tungstate, RE:KY(WO4)2, is a promising candidate for small, power-efficient, on-chip lasers and amplifiers. There are two major bottlenecks that complicate the realization of such devices. Firstly, the anisotropic thermal expansion coefficient of KY(WO4)2 makes it challenging to integrate the crystal on glass substrates. Secondly, the crystal layer has to be, for example, <1 µm to obtain single mode, high refractive index contrast waveguides operating at 1550 nm. In this work, different adhesives and bonding techniques in combination with several types of glass substrates are investigated. An optimal bonding process will enable further processing towards the manufacturing of integrated active optical KY(WO4)2 devices.
Original languageEnglish
Pages (from-to)2065-2076
Number of pages12
JournalOSA Continuum
Issue number6
Publication statusPublished - 15 Jun 2019

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