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		题名	作者	年代	出处	被引量
	1	Shape-tailored whispering gallery microcavity lasers designed by transformation optics显示文摘Semiconductor microdisk lasers have great potential as low-threshold,high-speed,and small-form-factor light sources required for photonic integrated circuits because of their high-Q factors associated with long-lived whispering gallery modes(WGMs).Despite these advantages,the rotational symmetry of the disk shape restricts practical applications of the photonic devices because of their isotropic emission,which lacks directionality in far-field emission and difficulty in free-space out coupling.To overcome this problem,deformation of the disk cavity has been mainly attempted.However,the approach cannot avoid significant Q degradation owing to the broken rotational symmetry.Here,we first report a deformed shape microcavity laser based on transformation optics,which exploits WGMs free from Q degradation.The deformed cavity laser was realized by a spatially varying distribution of deep-sub-wavelength-scale(60 nm diameter)nanoholes in an InGaAsP-based multi-quantum-well heterostructure.The lasing threshold of our laser is one-third of that of the same shaped homogeneous laser and quite similar to that of a homogeneous microdisk laser.The results mean that Q spoiling caused by the boundary shape deformation is recovered by spatially varying nanohole density distribution designed by transformation optics and effective medium approximation.	YONG-HOON LEE HONGHWI PARK INBO KIM SANG-JUN PARK SUNGHWAN RIM BYOUNG JUN PARK MOOHYUK KIM YUSHIN KIM MYUNG-KI KIM WON SEOK HAN HOSUNG KIM HONGSIK PARK MUHAN CHOI	2023	Photonics Research2023，11，9：	0

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