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Controlled tuning of whispering gallery modes of GaN/InGaN microdisk cavities

Igor Aharonovich, Nan Niu, Fabian Rol, Kasey J. Russell, Alexander Woolf, Haitham A. R. El-Ella, Menno J. Kappers, Rachel A Oliver, Evelyn L. Hu
2011 Applied Physics Letters  

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2011 pre-print
arXiv:1108.4743v1 fatcat:wwgnsetcozbyrlfgc5cjdjvxeu
Controlled tuning of the whispering gallery modes of GaN/InGaN μ-disk cavities is demonstrated. The whispering gallery mode (WGM) tuning is achieved at room temperature by immersing the μ-disks in water and irradiating with ultraviolet (UV) laser. The tuning rate can be controlled by varying the laser excitation power, with a nanometer precision accessible at low excitation power ( several μW). The selective oxidation mechanism is proposed to explain the results and supported by theoretical
more » ... ysis. The tuning of WGMs in GaN/InGaN μ-disk cavities may have important implication in cavity quantum electrodynamics and the development of efficient light emitting devices.
doi:10.1063/1.3640211 fatcat:vzzzpgts7verzc3x4lebdu6qo4
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Igor Aharonovich, Nan Niu, Fabian Rol, Kasey J. Russell, Alexander Woolf, Haitham A. R. El-Ella, Menno J. Kappers, Rachel A Oliver, Evelyn L. Hu. "Controlled tuning of whispering gallery modes of GaN/InGaN microdisk cavities." Applied Physics Letters 99.11 (2011) 111111