Journal
OPTICS LETTERS
Volume 42, Issue 8, Pages 1572-1575Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.42.001572
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Funding
- National Natural Science Foundation of China (NSFC)
- National Basic Research Program of China (973 program) [91423102, 61590930, 91323301, 2014CB921302, 61435005]
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In this Letter, we report a suspended whispering gallery mode microdisk with a hole pierced through its surface. The novel disk is made up of Rhodamine B-doped resin, which is fabricated by femtosecond laser direct writing technology. The pierced microcavity achieves highly directional emission of single-mode lasing with a far field divergence angle of about 10 deg, and its high Q factor exceeds 2.6 x 10(3). The excellent properties are confirmed by numerical simulation based on the finite-difference time-domain method. The effect of the pierced hole on the microcavity performance is discussed in detail. The method is easy to implement and has a guiding significance for improving the characteristics of an existing microcavity by simple modification. (C) 2017 Optical Society of America
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