Ultrabroadband etalon-free detection of infrared transients by van-der-Waals contacted sub-10-µm GaSe detectors

URN to cite this document:: urn:nbn:de:bvb:355-epub-379646
DOI to cite this document:: 10.5283/epub.37964

Knorr, Matthias ; Steinleitner, Philipp ; Raab, Jürgen ; Gronwald, Imke ; Merkl, Philipp ; Lange, Christoph ; Huber, Rupert

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Date of publication of this fulltext: 15 Nov 2018 07:01

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Abstract

We demonstrate ultrabroadband electro-optic detection of multi-THz transients using mechanically exfoliated flakes of gallium selenide of a thickness of less than 10 mu m, contacted to a diamond substrate by van-der-Waals bonding. While the low crystal thickness allows for extremely broadband phase matching, the excellent optical contact with the index-matched substrate suppresses multiple ...