Dear Prof. Steven Johnson and meep users,
At each time step, meep calculate modal volume proportional to field profile at
that time step.
Since at the next time step, field profile is changed thus the modal volume
changes.
I would like to know how we can obtain the correct value of the this quantity?
Regards,
Taimaz,
Date: Tue, 4 Sep 2012 01:34:26 +0800
From: [email protected]
To: [email protected]; [email protected]
Subject: Re: [Meep-discuss] definition of "meep-fields-modal-volume-in-box "
Does V is a time average value? or calculate in each step in meep?
V = integral (epsilon * |E|^2) / maximum (epsilon * |E|^2) or
integral ( ( integral (epsilon * |E|^2) )/ maximum (epsilon * |E|^2) *
dt ) / (delta T), where T= 1/f.
which is the calculation in meep?
------------------------------
At 2012-09-02 05:01:49,"Steven G. Johnson" <[email protected]> wrote:
On Aug 26, 2012, at 12:33 PM, liu wrote:
I have not found the definition of meep-fields-modal-volume-in-box in
meep. Can anyone give us the definition?
It computes
V = integral (epsilon * |E|^2) / maximum (epsilon * |E|^2)
in the box. This is a typical definition of modal volume used e.g. for Purcell
enhancement (because it appears in the local density of states computed at the
point of maximum E energy density, for a resonant mode).
Are there any other meep functions that have not descripted in meep
Reference ?
Plenty.
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