Purcell enhanced emission and saturable absorption of cavity-coupled CsPbBr$_3$ quantum dots
| Autor: | Purkayastha, Purbita, Gallagher, Shaun, Jiang, Yuxi, Lee, Chang-Min, Shen, Gillian, Ginger, David, Waks, Edo |
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| Rok vydání: | 2023 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | Halide perovskite semiconductors have emerged as promising materials for the development of solution-processed, scalable, high performance optoelectronic devices such as light-emitting diodes (LEDs) as well as coherent single photon emitters. Their integration to nanophotonic cavities for radiative enhancement and strong nonlinearity is underexplored. In this work, we demonstrate cavity-enhanced emission and saturable absorption using colloidal CsPbBr$_3$ perovskite quantum dots coupled to a high-Q cavity mode of a circular Bragg grating structure designed to facilitate integration of solution-processed materials . We achieve an order of magnitude increase in brightness and 8-fold increase in the spontaneous emission rate for the cavity-coupled emitters. This result indicates the possibility of achieving transform-limited photon coherence for the halide perovskites at cryogenic temperatures. We also observe saturable absorption of the emitters through intensity-dependent cavity quality factor. These results pave the way towards achieving improved photon indistinguishability and strong optical nonlinearities for cavity coupled perovskite systems. Comment: 10 pages, 4 figures |
| Databáze: | arXiv |
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