Abstract
Herein, a highly sensitive stress probe is reported based on pyrromethene 597 (PM597) doped elastic polydimethylsiloxane films. By sandwiching the dye doped elastic film with two plano dichromatic mirrors, a solid-sate microcavity laser with low laser threshold () is presented as a straightforward probing method for mechanical stress, which is monitored by the laser output spectra, demonstrating a resolution limit higher than 0.01 MPa. The photostability of PM597 doped into the microcavity laser is higher than , which is among the highest record ever reported to our knowledge and a fast self-recovery on the laser output in less than 1 h, attributed to diffusion of dye molecules is observed, indicating a practical durability for such stress probes.
© 2013 Optical Society of America
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