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In this paper, we propose a microcavity supported by a designed photoniccrystal structure (PhC) that supplies both tunability of cavity modes andquality factor of cavity. Low symmetric defect region provides a trigger effectfor the frequency shifting by means of rotational manipulation of smallsymmetry elements. Deviation of effective filling ratio as a result ofrotational modification within the defect region results in the emanation ofcavity modes at different frequencies. Here, we numerically demonstrate thefrequency shifting for each obtained mode with respect to defect regionarchitecture. In addition to wavelength tunability, quality factor, modevolume, and Purcell factors are analyzed for the slightly modified structures.Also, electric field distributions of each mode that emerge at distinctfrequencies have been also studied at adjusted frequency modes which areobserved for all rotational modification scenarios as $\theta_{rot}=[0^\circ,15^\circ,30^\circ, 40^\circ] $. After the investigations in 2D ofsilicon material ($\epsilon_r=12$), 3D simulations are performed and thecollected data is used for the stacking approximation of 3D structures to getthe 2D, thus the cross-checking of the quality factor that acquired from the 2Dsimulation can be executed by comparison with 3D. Limited 3D results areprojected to approximate 2D ones step by step and get an exponential trendwhich reaches in the limit to the $10^8$ value for Q-factor. Besides, 2D and 3Dsimulations of alumina ($\epsilon_r=9.61$) in terms of mode analysis andquality factor have been repeated considering the microwave experiments.Therefore, experimental analysis is compared with the numerical results andgood agreement between the two is found.

Reduced Symmetric 2D Photonic Crystal Cavity with Wavelength Tunability