Optical properties of thin films

Heavens, O.S.

doi:10.1088/0034-4885/23/1/301

Cited by 315 publications

(156 citation statements)

References 161 publications

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“…The complex transmittance of the two-layer system was computed by the transfer matrix formalism method including interference effects. 35 The complex dielectric function expressed as the sum of damped quasi-harmonic oscillators has the form 36…”

Section: Resultsmentioning

confidence: 99%

Soft and central mode behaviour in PbMg_1/3Nb_2/3O₃relaxor ferroelectric

Kamba¹,

Kempa²,

Bovtun³

et al. 2005

J. Phys.: Condens. Matter

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The relaxor ferroelectric PbMg 1/3 Nb 2/3 O3 was investigated by means of broad-band dielectric and Fourier Transform Infrared (FTIR) transmission spectroscopy in the frequency range from 1 MHz to 15 THz at temperatures between 20 and 900 K using PMN films on infrared transparent sapphire substrates. While thin film relaxors display reduced dielectric permittivity at low frequencies, their high frequency intrinsic or lattice response is shown to be the same as single crystal/ceramic specemins. It was observed that in contrast to the results of inelastic neutron scattering, the optic soft mode was underdamped at all temperatures. On heating, the TO1 soft phonon followed the Cochran law with an extrapolated critical temperature equal to the Burns temperature of 670 K and softened down to 50 cm −1 . Above 450 K the soft mode frequency leveled off and slightly increased above the Burns temperature. A central mode, describing the dynamics of polar nanoclusters appeared below the Burns temperature at frequencies near the optic soft mode and dramatically slowed down below 1 MHz on cooling below room temperature. It broadened on cooling, giving rise to frequency independent losses in microwave and lower frequency range below the freezing temperature of 200 K. In addition, a new heavily damped mode appeared in the FTIR spectra below the soft mode frequency at room temperature and below. The origin of this mode as well as the discrepancy between the soft mode damping in neutron and infrared spectra is discussed.

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Section: Resultsmentioning

confidence: 99%

Soft and central mode behaviour in PbMg_1/3Nb_2/3O₃relaxor ferroelectric

Kamba¹,

Kempa²,

Bovtun³

et al. 2005

J. Phys.: Condens. Matter

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“…따라서 여기서는 전달행렬(transfer matrix) 방법을 사용하여 구체적인 구조를 가진 BS의 투과계 수와 반사계수를 수치적으로 계산하였다. 여기서 사용한 행 렬법은 Heavens의 논문에 정리된 방식이며 [9] , 흔히 광학 교 과서에 소개된 방법 .) 이제 다음 두 종류의 BS에 대해 이 방법을 적용하여 반사 계수와 투과계수를 수치적으로 구하고, 이들 사이에 일반적 인 Stokes 관계식(식 (2), (4))을 검증해 보자.…”

Section: 전달행렬unclassified

A Study of the Phase Relations Between the Reflected and Transmitted Light Waves at a Beam Splitter and Their Application to Interferometers

Son¹,

Choi²,

Park³

et al. 2015

Korean Journal of Optics and Photonics

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In an amplitude-splitting interferometer, a beam splitter divides an input beam into two parts, which are superposed after propagating along separate paths, producing an interference effect. We have investigated the phase relation between the reflected and transmitted light waves at BS's made of lossless dielectric stacks. If we define the phases with proper reference planes, a definite phase relation exists, irrespective of the detailed structure of the layers in the BS. Although this results from the generalized Stokes relations, we have verified it numerically for two representative BS's with symmetric and asymmetric layer structures respectively. When we applied the phase relation to interferometers, we could determine the superposition state of the output beam (either constructive or destructive interference) for a general BS, and could verify that the light's energy was conserved. (Fig. 2) [2] . BS는 입력광을 분할하기도 하지만 되돌아오는 두 빔을 결합시켜 Fig. 2(b)와 같이 두 개의 출력광을 생성한

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“…Interferences can therefore be ignored. In the opposite case, the film would be considered as a thin film and its interaction with light should be described by wave optics [40]. When the incoming pencil strikes the front surface, it splits into reflected and refracted pencils.…”

Section: Reflectance and Transmittance Of An Absorbing Filmmentioning

confidence: 99%

Fundamentals of Optics and Radiometry for Color Reproduction

Hébert

Hersch

Emmel³

2014

Handbook of Digital Imaging

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Visual appearance of objects comes from the interpretation by the human visual system of a light signal issued from the objects. Describing or predicting appearance is therefore a question of light and requires notions about light propagation and measurement. In this paper, we introduce basic laws of optics, the science of light, and radiometry, the science of light measurement, in the context of colored surfaces. We address light spectrum and illuminants, polarization, notions of reflectance and transmittance based on radiometric definitions, gloss, absorption, scattering, fluorescence and models for light reflection and transmission by flat and rough surfaces, by slabs of nonscattering media and diffusing layers. Throughout the paper, we present the most current methods to assess the different physical quantities by measurement.

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Optical properties of thin films

Cited by 315 publications

References 161 publications

Soft and central mode behaviour in PbMg_1/3Nb_2/3O₃relaxor ferroelectric

Soft and central mode behaviour in PbMg_1/3Nb_2/3O₃relaxor ferroelectric

A Study of the Phase Relations Between the Reflected and Transmitted Light Waves at a Beam Splitter and Their Application to Interferometers

Fundamentals of Optics and Radiometry for Color Reproduction

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Optical properties of thin films

Cited by 315 publications

References 161 publications

Soft and central mode behaviour in PbMg1/3Nb2/3O3relaxor ferroelectric

Soft and central mode behaviour in PbMg1/3Nb2/3O3relaxor ferroelectric

A Study of the Phase Relations Between the Reflected and Transmitted Light Waves at a Beam Splitter and Their Application to Interferometers

Fundamentals of Optics and Radiometry for Color Reproduction

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Soft and central mode behaviour in PbMg_1/3Nb_2/3O₃relaxor ferroelectric

Soft and central mode behaviour in PbMg_1/3Nb_2/3O₃relaxor ferroelectric