Questions tagged [photonics]
Photonics is the science of creating, moving, and detecting photons
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What happens to the non-axial photons of a laser cavity?
When a laser cavity is pumped, the axial photons are reflected back and forth by the cavity mirrors and so contribute to stimulated emission, but the non-axial photons do not have this opportunity. ...
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Band theory of Photonic crystals
I have a basic question about the band structure of photonic crystals.
If I have a periodic potential, then Bloch-theory tells me that the bands yield the energy spectrum of the Hamilonian which is ...
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Iridescent duck and photonics in nature. Why duck's head is only green?
We all know and adore pure beauty of mallard male:
I know that such iridescent colours are usually a result of feathers forming a photonic crystal with layers of air sandwiched between layers of ...
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Books recommendation to understand Quantum Confined Stark Effect
I am starting a PhD on a photonic component involved with QCSE. The problem is that I have a Master degree in electronical engineering, not in fundamental physics, and I need to understand the QCSE in ...
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Homogeneous gain saturation and single-longitudinal-mode lasing
I am currently studying Laser Systems Engineering by Keith Kasunic. Chapter 1.2.1 Temporal Coherence says the following:
Whether or not multiple axial modes will lase depends, in part, on the cavity-...
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Are two localized single-photon states always invariant under the particle exchange?
In a text book for quantum communication, I learned that one generates optical pulses (wavepackets), each of which contains only one photon. For instance, the state of two wavepackets are described by ...
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Scattering vs Stimulated Emission
I am currently reading Practical Flow Cytometry, fourth edition, by Howard M. Shapiro. The author says the following when discussing scattering:
Scattering, which explains both reflection and ...
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Why is TE mode preferred to TM mode in the optical waveguide in silicon photonics?
I recently started learning about silicon photonics, focusing on its usage in the high-speed interconnect.
Most papers I've been reading so far use optical waveguides choosing TE00 as the dominant ...
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Non-monochromatic (multi-wavelength?) lasers
I was recently doing some reading on lasers, and I came across the fact that truly monochromatic light is impossible, which then obviously implies that truly monochromatic lasers are impossible. But ...
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What is a good introductory textbook to Laser Safety?
I was looking for a good textbook about Laser Safety (e.g. protection glasses design, distance of risk calculation, laser classification...). I can't find a complete book with these informations, ...
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What happens if obstacles (walls) been put where destructive interference occurs in double slit experiment?
If photon doesn't have probability to be in dark (destructive interference) area, what will be the effect of adding obstacles (walls) in the dark (destructive interference) area for the double slit ...
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What is up and down conversion in photonics?
I have heard the terms up and down conversion in photonics/photovoltaics articles. What do the terms mean?
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Can there be two different physical units (or dimensions) for a same physical quantity?
I was going through this book "Nonlinear optics" by Robert W. Boyd for my postgraduate subject in Nonlinear optics and I came across the different orders of nonlinear susceptibilities. From ...
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Photon as a qubit
I am studying Quantum Key Distribution which relies on photonic qubits, the photon.
Indeed, this one is viewed as a qubit, that is a two state system, just like the
spin of an electron, an atom with ...
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Why light radiates out of the bend in dielectric waveguides?
Why EM wave radiates out of the waveguide. Is this similar to centrifugal force?
