► For example, the hetero-PBG structure film is opaque for forward propagation, whereas it is transparent for backward propagation at 500nm
► Phase retarder layer affects the non- reciprocal transmission property.
► As refractive index anisotropy(Δn) is
Increased, hetero-PBG film has the non-reciprocal transmission property.
But, Δn is reduced, the non-reciprocal transmi
2. Thermal Equilibrium
Fermi level for the first time (Figure 3(c)) of the dash-dot line) is drawn.
Semiconductor conduction band and valence band of the neutral zone draw. To display the semiconductor doping level of Fermi level for the proper placement of the band (as shown in Figure 3-a in the neutral zone - energy band diagram, the same must be present.
In depletion layer
heterojunction field effect-transister)라고도 부른다. 이들은 게이트 산화막이 소자의 나머지 부분보다 더 큰 밴드갭을 갖는 반도체로 대체된 것을 제외하고는 MOSFET와 동일한 구조를 가지고 있다. 이는 더 빠른 고속화와 보다 높은 주파수의 밀리파를 처리할 수 있고, 보통의 MOSFET에 비해 저전압, 고속 동작이 가
1. What’s HEMT?
- High electron mobility with heterojunction structure
(Prevent Coulomb scattering with no doping materials)
- High thermal stability
- High Breakdown voltage
2. 2DEG
- Discontinuity through the conduction band of the two semiconductors determines a charge transfer,
creating a triangular potential.
3. Polarization
- AlGaN/GaN HEMTs tra