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Published July 5, 2013 | public
Journal Article

Self-aligned active quantum nanostructures in photonic crystals via selective wet-chemical etching


We propose a method of forming quantum-size emitters within a pre-defined photonic crystal in a self-aligned fashion through controlled removal of quantum well layers via selective wet-chemical etching. To demonstrate the effectiveness of our method, we take the example of a two-dimensional photonic crystal slab containing multiple quantum wells at its center. We successfully fabricate vertically stacked quantum nanostructures (or quantum dots) well aligned with respect to the photonic crystal backbone. Micro-photoluminescence measurements performed at 78 K reveal that the radiative transition energy blue-shifts when the lateral dimension reaches less than 100 nm, which is compared with a simple model based on the 'particle-in-a-box' picture. The proposed method may find a broad range of applications in photonics and quantum optics, where the coupling between an emitter and an optical mode needs to be maximized.

Additional Information

© 2013 IOP Publishing Ltd. Received 20 February 2013, in final form 7 May 2013 Published 3 June 2013. This work was supported by the Air Force Office of Scientific Research under Grant No. FA-9550-12-1-0052, the National Science Foundation under NSF CIAN ERC (EEC-0812072), and the Defense Advanced Research Projects Agency under the Nanoscale Architecture for Coherent Hyperoptical Sources program (W911NF-07-1-0277).

Additional details

August 19, 2023
March 5, 2024