Conformal Organohalide Perovskites Enable Lasing on Spherical Resonators

Brandon R. Sutherland, Sjoerd Hoogland, Michael M. Adachi, Chris T. O. Wong, Edward H. Sargent

Research output: Contribution to journalArticlepeer-review

328 Scopus citations


© 2014 American Chemical Society. Conformal integration of semiconductor gain media is broadly important in on-chip optical communication technology. Here we deploy atomic layer deposition to create conformally deposited organohalide perovskites-an attractive semiconducting gain medium-with the goal of achieving coherent light emission on spherical optical cavities. We demonstrate the high quality of perovskite gain media fabricated with this method, achieving optical gain in the nanosecond pulse regime with a threshold for amplified spontaneous emission of 65 ± 8 μJ cm-2. Through variable stripe length measurements, we report a net modal gain of 125 ± 22 cm-1 and a gain bandwidth of 50 ± 14 meV. Leveraging the high quality of the gain medium, we conformally coat silica microspheres with perovskite to form whispering gallery mode optical cavities and achieve lasing.
Original languageEnglish (US)
Pages (from-to)10947-10952
Number of pages6
JournalACS Nano
Issue number10
StatePublished - Oct 17 2014
Externally publishedYes


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