NOVELTY - The photonic nanostructure (200) comprises photonic nanobars (210) configured to collectively absorb light over an excitation wavelength range. The photonic nanobars: have different lengths; are configured in an array, where neighboring photonic nanobars vary in length; are arranged in a diamond-shaped group and/or a triangle-shaped group in the array; and are rectangular in cross-sectional shape along the lengths of the photonic nanobars. Each of the photonic nanobars has a smaller width relative to the different lengths.    USE - The photonic nanostructure is useful: as a light absorbing apparatus; in a device such as a light bulb, an image sensor and a solar cell; and in a stamp (all claimed).    ADVANTAGE - The photonic nanostructure can be efficiently manufactured with improved strength.    DETAILED DESCRIPTION - The photonic nanostructure (200) comprises photonic nanobars (210) configured to collectively absorb light over an excitation wavelength range. The photonic nanobars: have different lengths; are configured in an array, where neighboring photonic nanobars vary in length; are arranged in a diamond-shaped group and/or a triangle-shaped group in the array; and are rectangular in cross-sectional shape along the lengths of the photonic nanobars. Each of the photonic nanobars has a smaller width relative to the different lengths. One row of the array includes the photonic nanobars having lengths that are substantially identical to one another. Each of the width and a height of the photonic nanobars is sized to exhibit a dipolar enhancement effect that is outside the excitation wavelength range. The excitation wavelength range includes wavelengths of 400-800 nm. The metal comprises a metal film formed over a substrate defining shapes of the photonic nanobars. INDEPENDENT CLAIMS are included for:    (1) a light absorbing apparatus;    (2) a device comprising a photonic nanostructure;    (3) a method for forming a photonic nanostructure; and    (4) a stamp.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic perspective view of a photonic nanostructure.    Photonic nanostructure (200)    Rows (201, 202, 203)    Photonic nanobars (210)    Distances. (220, 222)