CAJ | 학술논문

1947年Goos和H?nchen发现,当电磁波束在玻璃/空气界面全反射时,在返回玻璃内部时有一项发生在入射面内的纵向位移；我们称之为正位移。实际上,稳态相位法的计算表明,位移可以为正、为零,甚至为负。由于界面上的表面波可以是前向型的和后向型的,携带的功率向着不同方向；故当激发起后向型表面波时就可获得入射波束的负位移。在多层结构中,当入射波束波矢的切向分量与表面波传播常数一致时,会发生类谐振现象并导致位移增大。<br>　　在一般情况下,当光束入射到金属表面,TM极化时GHS为负,并且绝对值比TE极化时大得多。但我们在微波的实验研究表明,在使用金属时可以在TE极化时发生负位移。实验时在全反射界面处为纳米级金属膜,是厚度30nm和60nm的铝膜,它蒸镀在厚18μm聚乙烯膜上。实验还发现,当改变入射角θ1并使之达到约qθ1c(θ1c为全反射临界角,q>1)出现类谐振现象,GHS的绝对值可达(5~7)cm。目前尚缺少对这些结果的理论解释。
1947년Goos화H?nchen발현,당전자파속재파리/공기계면전반사시,재반회파리내부시유일항발생재입사면내적종향위이；아문칭지위정위이。실제상,은태상위법적계산표명,위이가이위정、위령,심지위부。유우계면상적표면파가이시전향형적화후향형적,휴대적공솔향착불동방향；고당격발기후향형표면파시취가획득입사파속적부위이。재다층결구중,당입사파속파시적절향분량여표면파전파상수일치시,회발생류해진현상병도치위이증대。<br>　　재일반정황하,당광속입사도금속표면,TM겁화시GHS위부,병차절대치비TE겁화시대득다。단아문재미파적실험연구표명,재사용금속시가이재TE겁화시발생부위이。실험시재전반사계면처위납미급금속막,시후도30nm화60nm적려막,타증도재후18μm취을희막상。실험환발현,당개변입사각θ1병사지체도약qθ1c(θ1c위전반사림계각,q>1)출현류해진현상,GHS적절대치가체(5~7)cm。목전상결소대저사결과적이론해석。
It has been shown by Goos and H?nchen in 1947 that electro-magnetic wave beam totally re-flected from a glass-air interface suffers a longitudinal displacement in the plane of incidence before re-entry into the glass,we say this situation to be positive GH shifts. In fact,the longitudinal displacement as computed by the application of the stationary phase method can be positive,zero or negative. The sur-face waves may be of the forward or the backward type and they carry power in opposite directions in the interface. And then,a negative shift of the incident beam is obtained when the backward surface waves are excited. In a layered structure,when the tangential component of the wave vector of incident beam co-incides with the propagation constant of the surface wave,the resonance-like phenomenon leading to a large enhancement of the beam shift. <br> In common cases when a light beam incident on a metal surface,the GHS for TM polarized light in metals is negative and much bigger than the positive shift for TE polarized light. But a experimental re-search of the GHS was performed by our team with microwaves,the result was that the shifts for TE polar-ized wave in metals is negative---dataes of the total reflection influenced by nano metal-films deposite on the total reflecting surface,and the Al-films were 30nm and 60nm thick and were vapor deposited on polyethylene films of 18μm thickness. When the incidence angleθ1 near the value of qθ1c (θ1c is the critical angle of total reflection,q>1),it show a resonance-like behavior,the GHS has a strong maximum of (5~7)cm absolute-ly. There is no exact theory for explain these effects,now.