Abstract
The ability to manipulate microlaser performance is highly desirable so as to promote on-chip classical and quantum information-processing technology. Here, we demonstrate that mode manipulation of bottle microresonators is enabled by precise deposition of single gold nanoparticles in a reconfigurable and selective manner. Numerical investigation reveals the mechanism of introducing optical loss via single Au NP scattering. Experimental results show that the lasing action of cavity modes could be efficiently suppressed, and single mode lasing is successfully achieved with a high side mode suppression factor ∼13 dB.
Highlights
Microlasers, which are microscale coherent light sources, have attracted worldwide interest due to their intriguing prospects in on-chip optical communication, sensing, information processing, and so on.1–9 Since the first microlaser was realized by InGaAs quantum wells in the 1980s,10 the pace of laser miniaturization has never stopped
Whispering gallery modes (WGMs) exist in bottle microresonators with features such as high Q-factor, small mode volume, especially favorable tunability stemming from their bottle resonator geometry, and spatial structure of the cavity modes
By taking advantage of large fractions of evanescent fields and spatial distribution of cavity modes, efforts have been taken in order to achieve a single mode operation of lasing
Summary
Microlasers, which are microscale coherent light sources, have attracted worldwide interest due to their intriguing prospects in on-chip optical communication, sensing, information processing, and so on.1–9 Since the first microlaser was realized by InGaAs quantum wells in the 1980s,10 the pace of laser miniaturization has never stopped. It is noted that bottle microresonators have attracted much attention with various applications in optical delay line, optomechanics, frequency conversion, microlaser, and so on.20–26 Theoretically, whispering gallery modes (WGMs) exist in bottle microresonators with features such as high Q-factor, small mode volume, especially favorable tunability stemming from their bottle resonator geometry, and spatial structure of the cavity modes.27 By taking advantage of large fractions of evanescent fields and spatial distribution of cavity modes, efforts have been taken in order to achieve a single mode operation of lasing.28–30
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