Figure 4

(a) PL mapping of slanted positioned Y_1.94O₃:Ho³⁺_0.02/Yb³⁺_0.04 nanorod bundle. (b) PL mapping along the length of slant positioned Y_1.94O₃:Ho³⁺_0.02/Yb³⁺_0.04 nanorod bundle, inset shows the intensity distribution from position A to B. (c) PL mapping along the diameter of slant positioned Y_1.94O₃:Ho³⁺_0.02/Yb³⁺_0.04 nanorod bundle, inset shows the intensity distribution from position A to B. (d) PL mapping vertically positioned Y_1.94O₃:Ho³⁺_0.02/Yb³⁺_0.04 nanorod bundle. (e) PL mapping along the length of vertically positioned Y_1.94O₃:Ho³⁺_0.02/Yb³⁺_0.04 nanorod bundle, inset shows the intensity distribution from position A to B. (f) PL mapping along the diameter of vertically positioned Y_1.94O₃:Ho³⁺_0.02/Yb³⁺_0.04 nanorod bundle, inset shows the intensity distribution from position A to B.