Basic diffraction phenomena in time domain.
نویسندگان
چکیده
Using a recently developed technique (SEA TADPOLE) for easily measuring the complete spatiotemporal electric field of light pulses with micrometer spatial and femtosecond temporal resolution, we directly demonstrate the formation of theo-called boundary diffraction wave and Arago's spot after an aperture, as well as the superluminal propagation of the spot. Our spatiotemporally resolved measurements beautifully confirm the time-domain treatment of diffraction. Also they prove very useful for modern physical optics, especially in micro- and meso-optics, and also significantly aid in the understanding of diffraction phenomena in general.
منابع مشابه
Discretized Adjoint State Time and Frequency Domain Full Waveform Inversion: A Comparative Study
This study derives the discretized adjoint states full waveform inversion (FWI) in both time and frequency domains based on the Lagrange multiplier method. To achieve this, we applied adjoint state inversion on the discretized wave equation in both time domain and frequency domain. Besides, in this article, we introduce reliability tests to show that the inversion is performing as it should be ...
متن کاملIntroduction to Schramm-Loewner evolution and its application to critical systems
In this short review we look at recent advances in Schramm-Loewner Evolution (SLE) theory and its application to critical phenomena. The application of SLE goes beyond critical systems to other time dependent, scale invariant phenomena such as turbulence, sand-piles and watersheds. Through the use of SLE, the evolution of conformally invariant paths on the complex plane can be followed; hence a...
متن کاملInstantaneous Spectral Analysis for a Quantitative Measurement of Ultrasonic Attenuation in Biological Tissue*
The aim of quantitative echography is to provide numerical estimates of biological tissue parameters, such as attenuation, scattering strength, sound velocity, which can be clinically significant. In this domain, it has become clear that a careful modelling of the echogram formation process is necessary because, as the probing ultrasonic pulse propagates and interacts with biological structures...
متن کاملPhase-shift anomaly caused by subwavelength-scale metal slit or aperture diffraction.
Terahertz time-domain spectroscopy probes anomalous phase-shift caused by wave diffraction from a subwavelength-scale metal slit or aperture. Carrier frequency phase measurements in the far-field region reveals that nearly 30° phase advance is induced from a subwavelength slit diffraction and that 180° phase-advance from a subwavelength aperture. These results indicate that the conventional 90°...
متن کاملsance of an almost forgotten alternative interpretation of diffraction by the notion of the “boundary wave;” and the recent possibility of ultrashort pulsed illumi
By making use of a new technique for measuring the complete spatiotemporal electric field of light with micrometer spatial and femtosecond temporal resolution, we directly demonstrate the formation of the so called boundary diffraction wave and Arago’s spot, as well as the superluminal propagation of a “diffrac tion free” pulse. We believe that such spatiotemporally resolved measurements and th...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Optics express
دوره 18 11 شماره
صفحات -
تاریخ انتشار 2010