Novel diffractive feedback structures for semiconducting polymer lasers

A. E. Vasdekis; G. A. Turnbull; I. D. W. Samuel; G. E. Town

doi:10.1117/12.616863

9 October 2005 Novel diffractive feedback structures for semiconducting polymer lasers

A. E. Vasdekis, G. A. Turnbull, I. D. W. Samuel, G. E. Town

Proceedings Volume 5937, Organic Light-Emitting Materials and Devices IX; 59371O (2005) https://doi.org/10.1117/12.616863
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

Semiconducting conjugated polymers have recently attracted significant interest as amplifying media for solid-state lasers due to their functional photo-physical properties and simple fabrication. Distributed feedback (DFB) cavities are proving to be the most attractive for polymer lasers, since they can combine the properties of transverse optical pumping, low threshold and practical output beams. To date, in most polymer DFB lasers the feedback is provided by second order diffraction. This has the advantage of surface emission, though it also imposes extensive scattering losses. In this work, we present the use of alternative structures that attempt to reduce the threshold of polymer DFB lasers, and also achieve dual wavelength operation. The former was addressed with cavities formed by alternative symmetries of the Brillouin zone of a square lattice. Using the diagonal ΓM symmetry first order feedback was attained. The threshold energy was thus reduced by almost an order of magnitude as compared with the more commonly used ΓX symmetry of second order square gratings. Finally, we show that two lasing wavelengths may be set independently in a semiconducting polymer laser by using a doubly periodic (i.e. Moiré) DFB grating.

Citation Download Citation

A. E. Vasdekis, G. A. Turnbull, I. D. W. Samuel, and G. E. Town "Novel diffractive feedback structures for semiconducting polymer lasers", Proc. SPIE 5937, Organic Light-Emitting Materials and Devices IX, 59371O (9 October 2005); https://doi.org/10.1117/12.616863

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available