Integration, photostability and spontaneous emission rate enhancement of colloidal PbS nanocrystals for Si-based photonics at telecom wavelengths | Zendy

Markus Humer | Zendy; Romain Guider | Zendy; W. Jantsch | Zendy; Thomas Fromherz | Zendy

Open Access

Integration, photostability and spontaneous emission rate enhancement of colloidal PbS nanocrystals for Si-based photonics at telecom wavelengths

Author(s) -

Markus Humer,

Romain Guider,

W. Jantsch,

Thomas Fromherz

Publication year - 2013

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.21.018680

Subject(s) - materials science , nanocrystal , photoluminescence , wavelength , emission intensity , photonics , resonator , optoelectronics , optics , polymer , purcell effect , amplified spontaneous emission , waveguide , spontaneous emission , laser , nanotechnology , physics , composite material

We experimentally investigate PbS nanocrystal (NC) photoluminescence (PL) coupled to all-integrated Si-based ring resonators and waveguides at telecom wavelengths. Dissolving the NCs into Novolak polymer significantly improves their stability in ambient atmosphere. Polymer-NC blends of various NC concentrations can be applied to and removed from the same device. For NC concentrations up to 4vol%, the spontaneous emission rate into ring-resonator modes is enhanced by a factor of ~13 with respect to that into a straight waveguide. The PL intensity shows a linear dependence on the excitation intensity up to 1.64kW/cm(2) and stable quality factors of ~2500.

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