Gain Spectroscopy of Solution‐Based Semiconductor Nanocrystals in Tunable Optical Microcavities. Issue 2 (24th November 2015)

• Record Type: Journal Article
• Authors: Patel, Robin K.; Trichet, Aurélien A. P.; Coles, David M.; Dolan, Philip R.; Fairclough, Simon M.; Leontiadou, Marina A.; Tsang, S. C. Edman; Binks, David J.; Jang, Eunjoo; Jang, Hyosook; Taylor, Robert A.; Smith, Jason M.
• Is Part Of: Advanced optical materials. Volume 4:Issue 2(2016:Feb.)
• Page Start: 285
• Page End: 290
• Publication Date: 2015-11-24
• Subjects: lasing -- microcavities -- quantum dots -- spectroscopy; Optical materials -- Periodicals; Photonics -- Periodicals; 620.11295
• DOI: 10.1002/adom.201500363
• Languages: English
• ISSNs: 2195-1071

Abstract

Abstract : The lasing behavior of solution‐based colloidal quantum dots within an open microcavity is reported. The small size and wide tunability of the cavity provide single mode lasing over a wavelength range in excess of 25 nm. By extracting the lasing threshold and differential gain for the fundamental cavity mode over this spectral range, gain spectroscopy of the quantum dot solution is demonstrated. This new approach could help in the optimization of laser gain media and provides a way of constructing miniature laser arrays for on‐chip integration. Abstract : Optical gain spectroscopy of colloidal nanocrystals is performed using a tunable open access microcavity with an ultra‐small mode volume. By tuning the cavity mode energy across the nanocrystal ensemble emission band while performing lasing threshold measurements, information on the material gain characteristics can be extracted.