audio_part1
May 18, 2026 07:21
· 6:54
· English
· Whisper Turbo
· 1 Speaker
Transkrip ini tamat tempoh hari ini.
Naik taraf untuk storan kekal →
Papar sahaja
0:06
S…
Speaker 1 (audio_part1)
Hi, my name is Partha Mondol.
0:09
S…
Speaker 1 (audio_part1)
I am working as a postdoc researcher at King Abdullah University
0:13
S…
Speaker 1 (audio_part1)
of Science and Technology.
0:14
S…
Speaker 1 (audio_part1)
I am working under Professor Hakan Bakhi.
0:17
S…
Speaker 1 (audio_part1)
I am going to present our work titled as
0:22
S…
Speaker 1 (audio_part1)
Polarization Independent Dual -Band Quasi -Basey in All
0:26
S…
Speaker 1 (audio_part1)
Dielective Metasurfaces.
0:29
S…
Speaker 1 (audio_part1)
Here is the outline of my talk.
0:31
S…
Speaker 1 (audio_part1)
At first,
0:32
S…
Speaker 1 (audio_part1)
I will give very brief introduction of Bernstein continuum and
0:36
S…
Speaker 1 (audio_part1)
quasi -BIC.
0:37
S…
Speaker 1 (audio_part1)
Then I will highlight the advantages of dielectric metasurface
0:41
S…
Speaker 1 (audio_part1)
over plasmonic metasurface.
0:43
S…
Speaker 1 (audio_part1)
Then I will mainly focus on symmetry -protected BIC,
0:47
S…
Speaker 1 (audio_part1)
which we have employed in our structure,
0:49
S…
Speaker 1 (audio_part1)
then motivation,
0:51
S…
Speaker 1 (audio_part1)
design methodology,
0:52
S…
Speaker 1 (audio_part1)
reformatric simulation and result,
0:54
S…
Speaker 1 (audio_part1)
multipolar analysis,
0:55
S…
Speaker 1 (audio_part1)
and then conclusion.
1:00
S…
Speaker 1 (audio_part1)
BIC are the localized state that exists in
1:04
S…
Speaker 1 (audio_part1)
the
1:09
S…
Speaker 1 (audio_part1)
continuum of radiation spectrum.
1:11
S…
Speaker 1 (audio_part1)
It characterized by very high
1:16
S…
Speaker 1 (audio_part1)
Q factor and very low dissipative loss.
1:20
S…
Speaker 1 (audio_part1)
and it was first theorized by Newman and
1:24
S…
Speaker 1 (audio_part1)
Wagner in 1929 in the field of quantum mechanical
1:28
S…
Speaker 1 (audio_part1)
systems.
1:29
S…
Speaker 1 (audio_part1)
Then the idea was extended to the photonic system
1:33
S…
Speaker 1 (audio_part1)
and it founds in waveguide,
1:36
S…
Speaker 1 (audio_part1)
photonic crystal,
1:36
S…
Speaker 1 (audio_part1)
metal surface optical waveguide and it finds due to
1:40
S…
Speaker 1 (audio_part1)
its high Q factor and very extreme light confinement,
1:45
S…
Speaker 1 (audio_part1)
it has been utilized into many applications.
1:49
S…
Speaker 1 (audio_part1)
So there are different types of BIC based on their
1:57
S…
Speaker 1 (audio_part1)
formation.
1:59
S…
Speaker 1 (audio_part1)
So mainly it is divided by
2:03
S…
Speaker 1 (audio_part1)
accidental BIC which occurs due to
2:07
S…
Speaker 1 (audio_part1)
the cancellation of radiation,
2:09
S…
Speaker 1 (audio_part1)
due to the specific structural
2:13
S…
Speaker 1 (audio_part1)
parameter,
2:14
S…
Speaker 1 (audio_part1)
due to the continuous tuning of structural
2:18
S…
Speaker 1 (audio_part1)
parameter.
2:19
S…
Speaker 1 (audio_part1)
And it can be divided into it.
2:23
S…
Speaker 1 (audio_part1)
The Frederick Winton BIC or every pair of BIC comes
2:27
S…
Speaker 1 (audio_part1)
under this accidental BIC.
2:29
S…
Speaker 1 (audio_part1)
Another very popular kind of BIC is symmetry protected BIC
2:33
S…
Speaker 1 (audio_part1)
where the mode,
2:35
S…
Speaker 1 (audio_part1)
the radiation cancels out due to the symmetry mismatch between
2:40
S…
Speaker 1 (audio_part1)
the mode and the radiation.
2:42
S…
Speaker 1 (audio_part1)
So, for perfect VSE,
2:44
S…
Speaker 1 (audio_part1)
Q -factor is infinite,
2:46
S…
Speaker 1 (audio_part1)
but for quasi -VSE,
2:49
S…
Speaker 1 (audio_part1)
which is not possible because
2:54
S…
Speaker 1 (audio_part1)
it has zero line width,
2:56
S…
Speaker 1 (audio_part1)
so it is not possible to access externally.
2:59
S…
Speaker 1 (audio_part1)
So,
3:00
S…
Speaker 1 (audio_part1)
quasi -VSE,
3:03
S…
Speaker 1 (audio_part1)
which actually...
3:07
S…
Speaker 1 (audio_part1)
mix for practical application which is characterized by
3:11
S…
Speaker 1 (audio_part1)
high Q factor and VAC
3:15
S…
Speaker 1 (audio_part1)
is applied in biosensing in nonlinear optics and harmonic generation
3:20
S…
Speaker 1 (audio_part1)
and laser laser filtering and entangled
3:24
S…
Speaker 1 (audio_part1)
photon generation so plasmonic
3:28
S…
Speaker 1 (audio_part1)
matter surface which
3:32
S…
Speaker 1 (audio_part1)
support very strong resonant response and strong
3:37
S…
Speaker 1 (audio_part1)
air philic confinement but it due to it has very high absorption
3:41
S…
Speaker 1 (audio_part1)
loss and weak magnetic response so that's
3:45
S…
Speaker 1 (audio_part1)
why it limited q factor the other hand dialectic
3:49
S…
Speaker 1 (audio_part1)
structure which
3:53
S…
Speaker 1 (audio_part1)
like silicon titanium oxide gallium
3:58
S…
Speaker 1 (audio_part1)
nitride etc so which support both electric
4:03
S…
Speaker 1 (audio_part1)
and magnetic resonance by me resonance and a
4:08
S…
Speaker 1 (audio_part1)
very low dissipative loss and it
4:13
S…
Speaker 1 (audio_part1)
is used for metal lens beam steering many practical applications
4:17
S…
Speaker 1 (audio_part1)
and it is comfortable with also cmos portland platform
4:23
S…
Speaker 1 (audio_part1)
So symmetry protected BIC which comes
4:29
S…
Speaker 1 (audio_part1)
due to the symmetry mismatch and the symmetry
4:33
S…
Speaker 1 (audio_part1)
mismatch can be done by reducing the volume like
4:38
S…
Speaker 1 (audio_part1)
or by changing the orientation like if
4:42
S…
Speaker 1 (audio_part1)
we see this silicon
4:46
S…
Speaker 1 (audio_part1)
structure so by reducing the
4:50
S…
Speaker 1 (audio_part1)
If we make the system pattern,
4:52
S…
Speaker 1 (audio_part1)
so if we reduce certain length,
4:56
S…
Speaker 1 (audio_part1)
so there is Q factor QBIC
5:00
S…
Speaker 1 (audio_part1)
can generate and it gives rise to second harmonic generation.
5:05
S…
Speaker 1 (audio_part1)
or we can tune the angle or we can make
5:09
S…
Speaker 1 (audio_part1)
the system the whole like asymmetry right
5:13
S…
Speaker 1 (audio_part1)
or without any breaking we can without
5:17
S…
Speaker 1 (audio_part1)
breaking the structure we can just make the translational
5:21
S…
Speaker 1 (audio_part1)
symmetry like the species between these and
5:26
S…
Speaker 1 (audio_part1)
make the while the
5:30
S…
Speaker 1 (audio_part1)
mirror symmetry is
5:33
S…
Speaker 1 (audio_part1)
keep the mirror symmetry,
5:34
S…
Speaker 1 (audio_part1)
but breaking the transillational symmetry.
5:37
S…
Speaker 1 (audio_part1)
So we see two symmetry breaking mirror symmetry,
5:41
S…
Speaker 1 (audio_part1)
we see four symmetry.
5:42
S…
Speaker 1 (audio_part1)
But there are
5:46
S…
Speaker 1 (audio_part1)
main two challenges.
5:47
S…
Speaker 1 (audio_part1)
So one is that on the most of the
5:51
S…
Speaker 1 (audio_part1)
BIC, that is this challenge,
5:54
S…
Speaker 1 (audio_part1)
it becomes most of the BIC,
5:56
S…
Speaker 1 (audio_part1)
that is symmetry protected BIC,
5:58
S…
Speaker 1 (audio_part1)
that they are
6:02
S…
Speaker 1 (audio_part1)
dependent on the polarization of the system which
6:07
S…
Speaker 1 (audio_part1)
makes the limitation for practical
6:13
S…
Speaker 1 (audio_part1)
application and another key challenge is to
6:17
S…
Speaker 1 (audio_part1)
make the resonant
6:21
S…
Speaker 1 (audio_part1)
wavelength fixed against the robust
6:25
S…
Speaker 1 (audio_part1)
perturbation
6:27
S…
Speaker 1 (audio_part1)
so these two challenge and also very simple
6:31
S…
Speaker 1 (audio_part1)
design structure and high Q factor so in
6:35
S…
Speaker 1 (audio_part1)
that work we have proposed we propose amorphous silicon based
6:39
S…
Speaker 1 (audio_part1)
dielectric structure which support polarize an independent stable resonance
6:44
S…
Speaker 1 (audio_part1)
for CBSA which is applicable for
6:48
S…
Speaker 1 (audio_part1)
advanced volcanic application
Transkripsi ini dijana oleh AI (pengenalan percakapan automatik). Mungkin mengandungi ralat - semak dengan audio asal untuk penggunaan kritikal. Polisi AI
Ringkasan
Klik Ringkasan untuk mencipta ringkasan AI transkripsi ini.
Menyatakan...
Tanya AI Tentang Transkrip Ini
Tanya apa-apa tentang transkripsi ini — AI akan cari bahagian yang berkaitan dan menjawab.