Affordable Access

Publisher Website

A spontaneous multiphoton emission induced by inhomogeneous potential in electrically modulated two-dimensional electron gases

Microelectronic Engineering
Publication Date
DOI: 10.1016/s0167-9317(98)00203-2
  • Spontaneous Optical Emission
  • Inhomogeneous Potential Distribution
  • Electrically Modulated 2Deg
  • Thz Multiphoton Emission
  • Boltzmann Equation
  • Physics


Abstract A theoretical study is presented for spontaneous optical emission from a two-dimensional electron gas (2DEG) in the presence of a unidirectional spatially periodic modulation at low temperatures. The results obtained indicate that: (1) in an electrically modulated 2DEG at low temperatures, a strong electromagnetic radiation emission up to W/cm 2 can be generated by applying a d.c. driving electric field; (2) the radiation emission is generated indirectly in the occupied subbands through electronic transitions around the Fermi level; (3) the frequency of the radiation generated is at about 0.1 THz; (4) in the low frequency regime, spontaneous multiphoton emissions can be observed; and (5) this type of optical emission depends strongly on the sample parameters such as the electron density of the 2DEG and the modulation length.

There are no comments yet on this publication. Be the first to share your thoughts.