Talk:Surface plasmon

84.175.202.116 (talk) 12:32, 8 May 2012 (UTC)

Untitled
warning!!!!!!!! all contents of this "article" were stollen from Heinz Raether's book "surface plasmons". —Preceding unsigned comment added by 194.190.146.159 (talk) 10:26, 26 November 2009 (UTC)

Comment by Andreas Otto, 8.5.12
I found in wikipedia under "Surface Plasmon"  a scientifically well written article, but I (Prof.em. Andreas Otto) found no reference to my publications, though I received the Walter Schottky price 1974 of the German Physical Society  “in Würdigung seiner Arbeiten zum Verständnis oberflächenspezifischer Anregungszustände fester Körper durch die Methode der verhinderten Totalreflexion” ( in recognition of his work of understanding surface specific excitation states  with the method of attenuated total reflectivity ), The entry under Surface Plasmon is: The existence of surface plasmons was first predicted in 1957 by Rufus Ritchie. [1] In the following two decades, surface plasmons were extensively studied by many scientists, the foremost of whom were Heinz Raether, E. Kretschmann, and A. Otto. However, the historical development, ordered by date of submission of the articles is as follows: To my best knowledge, the dispersion of the SPP at a halfspace of a free electron gas was first presented in [Otto, A.. (1967). Theory of plasmon excitation in thin films by electrons of non-normal incidence. Physica Status Solidi B, 22(2), 401–406., Fig 4] Ordering by date of reception: 1) A.Otto, Eine neue Methode der Anregung nichtstrahlender Oberflächen Plasma-Schwingungen, (A new method to excite nonradiative surface plasma oscillations) phys.stat.sol.26,K99(1968), received February 13(1968) 2) A. Otto, Frühjahrstagung des Regionalverbandes Bayern der DPG, Phys. Verh.19, 144 (1968). (Spring meeting of the regional branch Bavaria of the german physical society. At this meeting in Munich A.O. told Prof. H. Raether from Hamburg, that the excitation of the nonradiative surface plasma wave was not possible for a thin silver film directly on the base plane of a prism, according to his calculations (see also ref 8). This was of course wrong. Raether used this chance, see ref 6). 3) A,Otto, Excitation of Nonradiative Surface Plasma Waves in Silver by the Method of Frustrated Total Reflection, Zeitschrift für Physik 216, 398--410 (1968) , received July 8, 1968 4) A.Otto , Excitation by Light of + and - Surface Plasma Waves in Thin Metal Layers , Z. Physik 219, 227--233 (1969) (Received October 23, 1968) 5) Rechnungen zu einem optischen Polarisator nach dem Prizip der der verhinderten Totalreflexion, (Calculations for an optical polarizer following the principle of prevented total reflectivity) Optik 29(3)(1969) 246-259, received October 23 (1968) 6) E. Kretschmann, H. Raether, Z. Naturforsch. 23 a,2135-2136, (1968) ; received 15 November 1968. Citation from this article: "The experiments described here shall demonstrate that the non-radiative mode excited by light can also radiate. The non-radiative mode is produced by the inhomogeneous light wave obtained by total reflexion inside a quartz prism as proposed in [ A. Otto, Z. Physik 216, 398 (1968)]. His measurements are analogous to the plasma resonance absorption whereas ours correspond to the plasma resonance emission of the radiative modes. " 7) A. Otto (1969). Wechselwirkungen elektromagnetischer Oberflächenwellen, (interactions of electromagnetic surface waves). Z. Angewandte Physik, 27(3), 207–209., received 19 February 1969. This paper erroneously excludes the Kretschmann-Configuration.    — Preceding unsigned comment added by 84.175.202.116 (talk) 12:23, 8 May 2012 (UTC)

I have written 2 review articles before any of H.Raether Otto, A., Experimental investigation of surface polaritons on plane interfaces, vol. Festkörperprobleme XIV, chap. 13, Pergamon, Vieweg. 1975, 1–37.  Otto, A., Spectroscopy of surface polaritons by attenuated total reflection in Optical Properties of Solids: New Developments, chap. 13, North Holland, Amsterdam. 1975, 677–729.

The entry "Surface plasmon" should be changed into: The existence of surface plasmons was first predicted in 1957 by Rufus Ritchie.[1] In the following two decades, surface plasmons were extensively studied by many scientists, the foremost of whom were Andreas Otto, Erwin Kretschmann and Heinz Raether. The first dispersion cuve of a surface plasmon at a surface of a free electron gas was first presented in [Otto, A.. (1967). Theory of plasmon excitation in thin films by electrons of non-normal incidence. Physica Status Solidi B, 22(2), 401–406., Fig 4] The priority to the invention of the excitation of surface plasmons, (now called surface plasmon polaritons) is held by Andreas Otto, See references 1)     A.Otto A.Otto, Eine neue Methode der Anregung nichtstrahlender Oberflächen Plasma- Schwingungen, (A new method to excite nonradiative surface plasma oscillations) phys.stat.sol.26,K99(1968), received February 13(1968) 2)       A.Otto, Excitation of Nonradiative Surface Plasma Waves in Silver by the Method of Frustrated Total Reflection, Zeitschrift für Physik 216, 398--410 (1968) , received July 8, 1968 3)     A.Otto, Excitation by Light of ω +  and ω -  Surface Plasma Waves in Thin Metal Layers , Z. Physik 219, 227--233 (1969) (Received October 23, 1968) 4)      E. Kretschmann, H. Raether, Z. Naturforsch. 23 a,2135-2136, (1968) ; received 15 November 1968] Citation from from this article: “The experiments described here shall demonstrate that the non-radiative mode excited by light can also radiate. The non-radiative mode is produced by the inhomogeneous light wave obtained by total reflexion inside a quartz prism as proposed in [Z. Physik 216, 398 (1968)]. His measurements are analogous to the plasma resonance absorption whereas ours correspond to the plasma resonance emission of the radiative modes.”

Further coomment by A.Otto The authors write : The surface plasma frequency is given by omega(p)/ squareroot of epsailon 1+epsilon2 In the case of air, this result simplifies to omega(p)/ squareroot of epsailon 1+1 Please wreite to otto@uni-duesseldorf.de when you have made the changes of your entry.

The figure 4 the Surface Plasmon energy is given as omega p /squareroot 2 This implies ε2=1. Therefore the equation given in Fig 4 should be changed. It is surprising, that k is given in arbitrary units. They can easily be given quantitatively in units of ωp/c  Please look at Fig 4 from Otto, A.. (1967). Theory of plasmon excitation in thin films by electrons of non-normal incidence. Physica Status Solidi B, 22(2), 401–406. (Prof.Dr. Andreas Otto)

= Did the author mean to use absorption in the section "Experimental appllications?" ==

Note the use of "molecular adsorption" in the beginning of the discussion, and then the claim at the end that the sensor works by detecting changes in the *absorption* of the gold:

> Position and intensity of plasmon absorption and emission peak is affected by > molecular adsorption, which can be used in molecular sensors. For example, a fully > operational prototype device detecting casein in milk has been fabricated. The devices is > based on detecting change in absorption of a gold layer.[8]

I was curious if the author might have made a typographical error in the last part, stating "detecting change in absorption of a gold layer" when they meant to say "detecting change in adsorption of a gold layer" or perhaps "detecting changes in plasmon absorption of a gold layer induced by molecular adsorption".

I am not a subject matter expert, and would prefer not to edit the page, but it struck me as a possible point of contention.

Cheers —Preceding unsigned comment added by Techgrrl (talk • contribs) 00:36, 18 August 2009 (UTC)
 * It was I :-) but long time ago. The phrase does means absorption (not "ad"), but I agree the formulation is a bit unclear and will change it in a moment. Thanks. Materialscientist (talk) 02:43, 18 August 2009 (UTC)

I'm not an expert either on this issue, and therefore I don't feel confident in making any correction, but I think there is an error when you say "Since the dispersion curve lies to the right of the light line, ω = k·c, the SPP has a longer wavelength than free-space radiation....". I think you mean "has a shorter wavelength" or "longer wavector", isn't it? (Juniocruz (talk) 13:16, 26 October 2009 (UTC))
 * The article is correct. You can think about the graph this way: we usually take ω = k·c, but the actual plasmon dispersion curve bends down, so that if we take a (higher-k) datapoint, and approximate it by kc' line, we have to take c' smaller than the initial (near the 0,0 origin) c0 value, that means the propagation speed is smaller in the material than in vacuum. Materialscientist (talk) 22:44, 26 October 2009 (UTC)
 * I agree with Juniocruz. Check reference WL Barnes, A Dereux, TW Ebbesen - Nature, 2003, Surface plasmon subwavelength optics Box 1, Figure c. --Arjen Dijksman (talk) 21:06, 5 November 2009 (UTC)
 * My memory is getting weak and I forgot the universal relation λ=2π/k :-( Too bad. Materialscientist (talk) 00:30, 6 November 2009 (UTC)

Acoustic surface plasmon
Recently were observed also the acoustic surface plasmons, although these waves do not manifest strongly. The article should mention this phenomena, too. They are supposed to be bound to the Shockley-Tamm states on the metal surface. See e. g. Pohl, K. et al, Acoustic surface plasmon on Cu(111), EPL, 90 (2010). --FDominec (talk) 22:36, 1 March 2011 (UTC)

A Help Desk post about this article.
Please see Help desk where an IP editor who is apparently Andreas Otto, has posted a question about adding certain material to this article. Roger (talk) 20:59, 10 April 2012 (UTC)

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