Positive and negative phototunability of chalcogenide (AMTIR-1) microdisk resonator

We demonstrate externally photo-induced partially-reversible tuning of the resonance of a microdisk made of AMTIR-1 (Ge(33)As(12)Se(55)). We have achieved for the first time, to the best of our knowledge, both positive and negative shift in a microresonator with external tuning. A positive resonance...

Full description

Saved in:
Bibliographic Details
Published in:Optics express 2015-04, Vol.23 (7), p.8681-8686
Main Authors: Singh, Neetesh, Hudson, Darren D, Wang, Rongping, Mägi, Eric C, Choi, Duk-Yong, Grillet, Christian, Luther-Davies, Barry, Madden, Stephen, Eggleton, Benjamin J
Format: Article
Language:English
Subjects:
Physics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We demonstrate externally photo-induced partially-reversible tuning of the resonance of a microdisk made of AMTIR-1 (Ge(33)As(12)Se(55)). We have achieved for the first time, to the best of our knowledge, both positive and negative shift in a microresonator with external tuning. A positive resonance shift of 1 nm and a negative resonance shift of 0.5 nm on a single microdisk has been measured. We have found that this phenomenon is due to initial photo-expansion of the microdisk followed by the photo-bleaching of the AMTIR-1. The observed shifts and the underlying phenomenon is controllable by varying the illumination power (i.e. the low power illumination suppresses the photobleaching process). We measure a loaded quality factor of 1.2x10(5) at 1550nm (limited by the measuring instrument). This holds promise for non-contact low power reversible-tunning of photonic circuit elements.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.23.008681