| 摘要 |
A light source is based on a combination of silicon and calcium fluoride (CaF<SUB>2</SUB>). The silicon and the calcium fluoride need not be pure, but may be doped, or even alloyed, to control their electrical and /or physical properties. Preferably the light source employs interleaved portions, e.g., arranged as a multilayer structure, of silicon (109) and calcium fluoride (107, 111 ) and operates using intersubband transitions in the conduction band so as to emit light in the near infrared spectral range. The light source may be arranged so as to form a quantum cascade laser, a ring resonator laser, a waveguide optical amplifier. |
