Patent ID: 7092421

Claim:
A unipolar optoelectronic transducer comprising: an active region in which unipolar carriers undergo intraband optoelectronic transitions in response to the application of energy thereto, said active region exhibiting a frequency spectrum of an optoelectronic parameter, characterized in that a 2D array of essentially equally spaced regions exhibits resonant modes at particular frequencies, each of said spaced regions has a depth that extends through said active region, each of said spaced regions has an average refractive index different from that of said active region, thereby defining a refractive index contrast between said spaced regions and said active region, and said refractive index contrast, the dimensions of each of said spaced regions, and the spacing of said spaced regions are mutually adapted so that said array is a micro-cavity resonator having its axis along a first direction and so that at least one frequency of said modes of said 2D array falls within said parameter spectrum of said active region.