Kyoto University · 공학
Zhenghao Chen 교수의 연구실은 반도체 나노구조에서의 비선형 광학 현상, 특히 인터서브밴드 전이에 기반한 2차 고조파 발진을 중심으로 연구를 진행하고 있습니다. GaAs/AlGaAs 단계형 양자우물 및 다중 양자우물 구조를 활용한 파장 조절 가능한 표면 발광형 비선형 광소자 개발에 초점을 맞추고 있으며, 높은 변환 효율을 달성한 응용 기술 개발도 함께 진행하고 있습니다. 또한, 유전자 기반의 암 생물학 및 환경 독소가 대사질환에 미치는 영향에 대한 생물의학적 연구도 병행하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Second-harmonic generation due to intersubband transitions in GaAs/AlxGa1−xAs step quantum well structures has been studied with a tunable TEA CO2 laser. The maximum value of χ(2)(2ω) is found to be ∼9×10−7 m/V. Using a multipass or ‘‘waveguide’’ structure, a conversion efficiency of more than 3×10−4 has been obtained.
We report the first experimental evidence of second-harmonic generation due to intersubband transitions in GaAs-Ga1−xAlxAs step multiquantum wells with a waveguiding surface-emitting structure. The second-harmonic generation signal obeys wave vector conservation and propagates perpendicular to the waveguiding surface. As high as 3×10−3 power conversion efficiency has been obtained. The experimental analysis and the severalfold benefit of this novel technique have been given in detail.
Our study elucidated the possible role of TRP family genes in cancer progression and provided insights for further studies on TRP family genes as potential pan-cancer targets to develop diagnostic and therapeutic strategies.
Serum cadmium was negatively associated diabetes among the representative samples of the whole population in the United States under the normal level of serum cadmium exposure. However, there was no association between serum cadmium level and the occurrence of diabetes in the high serum cadmium exposure group. This study promoted an update of new preventative strategy targeting environment for the prevention and control of diabetes in the future.
