Fig. 4: Polarization-dependent Berry phase as a function of the cross-section geometry, T/W.
From: Experimental observation of Berry phases in optical Möbius-strip microcavities
a, An increasing Berry phase is demonstrated by comparing the resonant-mode offsets between Möbius- and curved-strip cavities with decreasing T/W. The dashed lines and arrows are used to denote the wavelength offsets. b, Berry phase occurring in Möbius-strip cavities as a function of T/W. Circles and diamonds represent data extracted from experimental and simulated spectra, respectively. Dotted lines guide the eyes.
